From 19004a003b3e4387de43f8c399971187156f3d54 Mon Sep 17 00:00:00 2001
From: Nicolas Capponi <nicolas.capponi@forgerock.com>
Date: Mon, 30 May 2016 10:43:11 +0000
Subject: [PATCH] OPENDJ-2987 Remove object class parsing in ObjectClassSyntax class - now responsability of Schema class

---
 opendj-server-legacy/src/main/java/org/opends/guitools/controlpanel/util/RemoteSchemaLoader.java |    3 
 opendj-server-legacy/src/main/java/org/opends/server/backends/SchemaBackend.java                 |   89 +-
 opendj-server-legacy/src/main/java/org/opends/server/schema/ObjectClassSyntax.java               | 1184 -------------------------------------------
 opendj-server-legacy/src/test/java/org/opends/server/schema/GenericSchemaTestCase.java           |   41 
 opendj-server-legacy/src/main/java/org/opends/server/types/Schema.java                           |  231 ++++++--
 opendj-server-legacy/src/main/java/org/opends/server/core/SchemaConfigManager.java               |   69 -
 opendj-server-legacy/src/messages/org/opends/messages/schema.properties                          |    2 
 7 files changed, 268 insertions(+), 1,351 deletions(-)

diff --git a/opendj-server-legacy/src/main/java/org/opends/guitools/controlpanel/util/RemoteSchemaLoader.java b/opendj-server-legacy/src/main/java/org/opends/guitools/controlpanel/util/RemoteSchemaLoader.java
index fcf0f19..d1cc4f2 100644
--- a/opendj-server-legacy/src/main/java/org/opends/guitools/controlpanel/util/RemoteSchemaLoader.java
+++ b/opendj-server-legacy/src/main/java/org/opends/guitools/controlpanel/util/RemoteSchemaLoader.java
@@ -39,7 +39,6 @@
 import org.opends.server.core.ServerContext;
 import org.opends.server.replication.plugin.HistoricalCsnOrderingMatchingRuleImpl;
 import org.opends.server.schema.AciSyntax;
-import org.opends.server.schema.ObjectClassSyntax;
 import org.opends.server.schema.SchemaConstants;
 import org.opends.server.schema.SubtreeSpecificationSyntax;
 import org.opends.server.types.DirectoryException;
@@ -174,7 +173,7 @@
             schema.registerAttributeType(sb.toString(), null, true);
             break;
           case ConfigConstants.ATTR_OBJECTCLASSES_LC:
-            schema.registerObjectClass(ObjectClassSyntax.decodeObjectClass(sb, schema, false), true);
+            schema.registerObjectClass(sb.toString(), null, true);
             break;
           }
           registered.add(definition);
diff --git a/opendj-server-legacy/src/main/java/org/opends/server/backends/SchemaBackend.java b/opendj-server-legacy/src/main/java/org/opends/server/backends/SchemaBackend.java
index f2f2874..2f59cf4 100644
--- a/opendj-server-legacy/src/main/java/org/opends/server/backends/SchemaBackend.java
+++ b/opendj-server-legacy/src/main/java/org/opends/server/backends/SchemaBackend.java
@@ -16,6 +16,7 @@
  */
 package org.opends.server.backends;
 
+import static org.forgerock.opendj.ldap.ResultCode.*;
 import static org.forgerock.util.Reject.*;
 import static org.opends.messages.BackendMessages.*;
 import static org.opends.messages.ConfigMessages.*;
@@ -48,6 +49,7 @@
 import java.util.TreeSet;
 
 import org.forgerock.i18n.LocalizableMessage;
+import org.forgerock.i18n.LocalizableMessageDescriptor.Arg2;
 import org.forgerock.i18n.slf4j.LocalizedLogger;
 import org.forgerock.opendj.config.server.ConfigChangeResult;
 import org.forgerock.opendj.config.server.ConfigException;
@@ -85,7 +87,6 @@
 import org.opends.server.schema.DITStructureRuleSyntax;
 import org.opends.server.schema.GeneralizedTimeSyntax;
 import org.opends.server.schema.NameFormSyntax;
-import org.opends.server.schema.ObjectClassSyntax;
 import org.opends.server.schema.ServerSchemaElement;
 import org.opends.server.schema.SomeSchemaElement;
 import org.opends.server.types.Attribute;
@@ -762,22 +763,8 @@
           {
             for (ByteString v : a)
             {
-              ObjectClass oc;
-              try
-              {
-                oc = ObjectClassSyntax.decodeObjectClass(v, newSchema, false);
-              }
-              catch (DirectoryException de)
-              {
-                logger.traceException(de);
-
-                LocalizableMessage message = ERR_SCHEMA_MODIFY_CANNOT_DECODE_OBJECTCLASS.
-                    get(v, de.getMessageObject());
-                throw new DirectoryException(
-                    ResultCode.INVALID_ATTRIBUTE_SYNTAX, message, de);
-              }
-
-              addObjectClass(oc, newSchema, modifiedSchemaFiles);
+              ObjectClass objectClass = newSchema.parseObjectClass(v.toString());
+              addObjectClass(objectClass, newSchema, modifiedSchemaFiles);
             }
           }
           else if (at.equals(nameFormsType))
@@ -900,21 +887,7 @@
           {
             for (ByteString v : a)
             {
-              ObjectClass oc;
-              try
-              {
-                oc = ObjectClassSyntax.decodeObjectClass(v, newSchema, false);
-              }
-              catch (DirectoryException de)
-              {
-                logger.traceException(de);
-
-                LocalizableMessage message = ERR_SCHEMA_MODIFY_CANNOT_DECODE_OBJECTCLASS.
-                    get(v, de.getMessageObject());
-                throw new DirectoryException(
-                    ResultCode.INVALID_ATTRIBUTE_SYNTAX, message, de);
-              }
-
+              ObjectClass oc = newSchema.parseObjectClass(v.toString());
               removeObjectClass(oc, newSchema, mods, pos, modifiedSchemaFiles);
             }
           }
@@ -1194,7 +1167,7 @@
       String schemaFile = replaceExistingSchemaElement(
           modifiedSchemaFiles, new SomeSchemaElement(attributeType), new SomeSchemaElement(existingType));
       schema.registerAttributeType(attributeType, schemaFile, false);
-      schema.rebuildDependentElements(new SomeSchemaElement(existingType));
+      schema.rebuildDependentElements(existingType);
     }
   }
 
@@ -1545,15 +1518,14 @@
     // Otherwise, we're replacing an existing one.
     if (existingClass.isPlaceHolder())
     {
-      schema.registerObjectClass(objectClass, false);
-      addNewSchemaElement(modifiedSchemaFiles, objectClass);
+      String schemaFile = addNewSchemaElement(modifiedSchemaFiles, new SomeSchemaElement(objectClass));
+      schema.registerObjectClass(objectClass, schemaFile, false);
     }
     else
     {
-      schema.deregisterObjectClass(existingClass);
-      schema.registerObjectClass(objectClass, false);
-      schema.rebuildDependentElements(existingClass);
-      replaceExistingSchemaElement(modifiedSchemaFiles, objectClass, existingClass);
+      final String schemaFile = replaceExistingSchemaElement(
+          modifiedSchemaFiles, new SomeSchemaElement(objectClass), new SomeSchemaElement(existingClass));
+      schema.replaceObjectClass(objectClass, existingClass, schemaFile);
     }
   }
 
@@ -1618,7 +1590,7 @@
         ObjectClass oc;
         try
         {
-          oc = ObjectClassSyntax.decodeObjectClass(v, schema, true);
+          oc = schema.parseObjectClass(v.toString());
         }
         catch (DirectoryException de)
         {
@@ -3448,7 +3420,7 @@
       {
         // It IS important here to allow the unknown elements that could
         // appear in the new config schema.
-        ObjectClass newObjectClass = ObjectClassSyntax.decodeObjectClass(v, newSchema, true);
+        ObjectClass newObjectClass = newSchema.parseObjectClass(v.toString());
         String schemaFile = getSchemaFile(newObjectClass);
         if (CONFIG_SCHEMA_ELEMENTS_FILE.equals(schemaFile))
         {
@@ -3458,10 +3430,8 @@
           continue;
         }
 
-        // Now we know we are not in the config schema, let's check
-        // the unknown elements ... sadly but simply by redoing the
-        // whole decoding.
-        newObjectClass = ObjectClassSyntax.decodeObjectClass(v, newSchema, false);
+        // Now we know we are not in the config schema, let's check the unknown elements ...
+        validateNoUnknownElements(newObjectClass);
         oidList.add(newObjectClass.getOID());
         try
         {
@@ -3517,6 +3487,35 @@
     }
   }
 
+  private void validateNoUnknownElements(ObjectClass oc) throws DirectoryException
+  {
+    validateNoUnknownElements(oc.getDeclaredOptionalAttributes(), oc.getOID(),
+        WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_OPTIONAL_ATTR);
+    validateNoUnknownElements(oc.getDeclaredRequiredAttributes(), oc.getOID(),
+        WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_REQUIRED_ATTR);
+    for (ObjectClass superiorClass : oc.getSuperiorClasses())
+    {
+      if (superiorClass.isPlaceHolder())
+      {
+        LocalizableMessage message =
+            WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_SUPERIOR_CLASS.get(oc.getOID(), superiorClass.getOID());
+        throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION, message);
+      }
+    }
+  }
+
+  private void validateNoUnknownElements(Set<AttributeType> attributeTypes, String oid, Arg2<Object, Object> msg)
+      throws DirectoryException
+  {
+    for (AttributeType attributeType : attributeTypes)
+    {
+      if (attributeType.isPlaceHolder())
+      {
+        throw new DirectoryException(CONSTRAINT_VIOLATION, msg.get(oid, attributeType.getOID()));
+      }
+    }
+  }
+
   @Override
   public void createBackup(BackupConfig backupConfig) throws DirectoryException
   {
diff --git a/opendj-server-legacy/src/main/java/org/opends/server/core/SchemaConfigManager.java b/opendj-server-legacy/src/main/java/org/opends/server/core/SchemaConfigManager.java
index 086c3cf..adf6089 100644
--- a/opendj-server-legacy/src/main/java/org/opends/server/core/SchemaConfigManager.java
+++ b/opendj-server-legacy/src/main/java/org/opends/server/core/SchemaConfigManager.java
@@ -35,7 +35,6 @@
 import org.opends.server.schema.DITContentRuleSyntax;
 import org.opends.server.schema.DITStructureRuleSyntax;
 import org.opends.server.schema.NameFormSyntax;
-import org.opends.server.schema.ObjectClassSyntax;
 import org.opends.server.types.Attribute;
 import org.opends.server.types.DITContentRule;
 import org.opends.server.types.DITStructureRule;
@@ -45,7 +44,6 @@
 import org.opends.server.types.LDIFImportConfig;
 import org.opends.server.types.Modification;
 import org.opends.server.types.NameForm;
-import org.forgerock.opendj.ldap.schema.ObjectClass;
 import org.opends.server.types.Schema;
 import org.opends.server.util.LDIFReader;
 import org.opends.server.util.StaticUtils;
@@ -671,62 +669,43 @@
   {
     if (ocList != null)
     {
+      List<String> definitions = new ArrayList<>();
       for (Attribute a : ocList)
       {
         for (ByteString v : a)
         {
-          // Parse the objectclass.
-          ObjectClass oc;
-          try
-          {
-            oc = ObjectClassSyntax.decodeObjectClass(v, schema, false);
-            setExtraProperty(oc, SCHEMA_PROPERTY_FILENAME, null);
-            setSchemaFile(oc, schemaFile);
-          }
-          catch (DirectoryException de)
-          {
-            logger.traceException(de);
+          definitions.add(v.toString());
+        }
+      }
+      try
+      {
+        schema.registerObjectClasses(definitions, schemaFile, !failOnError);
+      }
+      catch (DirectoryException de)
+      {
+        logger.traceException(de);
 
-            LocalizableMessage message = WARN_CONFIG_SCHEMA_CANNOT_PARSE_OC.get(
-                    schemaFile,
-                    de.getMessageObject());
-            reportError(failOnError, de, message);
-            continue;
-          }
-          catch (Exception e)
-          {
-            logger.traceException(e);
-
-            LocalizableMessage message = WARN_CONFIG_SCHEMA_CANNOT_PARSE_OC.get(
-                    schemaFile, v + ":  " + getExceptionMessage(e));
-            reportError(failOnError, e, message);
-            continue;
-          }
-
-          // Register it with the schema.  We will allow duplicates, with the
+        if (de.getResultCode().equals(ResultCode.CONSTRAINT_VIOLATION))
+        {
+          // Register it with the schema. We will allow duplicates, with the
           // later definition overriding any earlier definition, but we want
           // to trap them and log a warning.
+          logger.warn(WARN_CONFIG_SCHEMA_CONFLICTING_OC, schemaFile, de.getMessageObject());
           try
           {
-            schema.registerObjectClass(oc, failOnError);
+            schema.registerObjectClasses(definitions, schemaFile, true);
           }
-          catch (DirectoryException de)
+          catch (DirectoryException e)
           {
-            logger.traceException(de);
-
-            logger.warn(WARN_CONFIG_SCHEMA_CONFLICTING_OC, schemaFile, de.getMessageObject());
-
-            try
-            {
-              schema.registerObjectClass(oc, true);
-            }
-            catch (Exception e)
-            {
-              // This should never happen.
-              logger.traceException(e);
-            }
+            // This should never happen
+            logger.traceException(e);
           }
         }
+        else
+        {
+          LocalizableMessage message = WARN_CONFIG_SCHEMA_CANNOT_PARSE_OC.get(schemaFile, de.getMessageObject());
+          reportError(failOnError, de, message);
+        }
       }
     }
   }
diff --git a/opendj-server-legacy/src/main/java/org/opends/server/schema/ObjectClassSyntax.java b/opendj-server-legacy/src/main/java/org/opends/server/schema/ObjectClassSyntax.java
index 57b50fd..83d20e1 100644
--- a/opendj-server-legacy/src/main/java/org/opends/server/schema/ObjectClassSyntax.java
+++ b/opendj-server-legacy/src/main/java/org/opends/server/schema/ObjectClassSyntax.java
@@ -16,33 +16,12 @@
  */
 package org.opends.server.schema;
 
-import static org.opends.messages.SchemaMessages.*;
-import static org.opends.server.config.ConfigConstants.*;
 import static org.opends.server.schema.SchemaConstants.*;
-import static org.opends.server.util.ServerConstants.*;
-import static org.opends.server.util.StaticUtils.*;
 
-import java.util.LinkedHashMap;
-import java.util.LinkedHashSet;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
-import org.forgerock.i18n.LocalizableMessage;
-import org.forgerock.i18n.LocalizableMessageDescriptor.Arg2;
-import org.forgerock.opendj.ldap.ByteSequence;
-import org.forgerock.opendj.ldap.ResultCode;
-import org.forgerock.opendj.ldap.schema.AttributeType;
-import org.forgerock.opendj.ldap.schema.ObjectClassType;
+import org.forgerock.opendj.ldap.schema.Schema;
 import org.forgerock.opendj.ldap.schema.Syntax;
 import org.forgerock.opendj.server.config.server.AttributeSyntaxCfg;
 import org.opends.server.api.AttributeSyntax;
-import org.opends.server.core.DirectoryServer;
-import org.opends.server.types.CommonSchemaElements;
-import org.opends.server.types.DirectoryException;
-import org.forgerock.opendj.ldap.schema.ObjectClass;
-import org.opends.server.types.Schema;
 
 /**
  * This class implements the object class description syntax, which is used to
@@ -52,1191 +31,36 @@
 public class ObjectClassSyntax
        extends AttributeSyntax<AttributeSyntaxCfg>
 {
-
   /**
    * Creates a new instance of this syntax.  Note that the only thing that
-   * should be done here is to invoke the default constructor for the
-   * superclass.  All initialization should be performed in the
-   * <CODE>initializeSyntax</CODE> method.
+   * should be done here is to invoke the default constructor for the superclass.
    */
   public ObjectClassSyntax()
   {
     super();
   }
 
-  /** {@inheritDoc} */
   @Override
-  public Syntax getSDKSyntax(org.forgerock.opendj.ldap.schema.Schema schema)
+  public Syntax getSDKSyntax(Schema schema)
   {
     return schema.getSyntax(SchemaConstants.SYNTAX_OBJECTCLASS_OID);
   }
 
-  /** {@inheritDoc} */
   @Override
   public String getName()
   {
     return SYNTAX_OBJECTCLASS_NAME;
   }
 
-  /** {@inheritDoc} */
   @Override
   public String getOID()
   {
     return SYNTAX_OBJECTCLASS_OID;
   }
 
-  /** {@inheritDoc} */
   @Override
   public String getDescription()
   {
     return SYNTAX_OBJECTCLASS_DESCRIPTION;
   }
-
-  /**
-   * Decodes the contents of the provided ASN.1 octet string as an objectclass
-   * definition according to the rules of this syntax.  Note that the provided
-   * octet string value does not need to be normalized (and in fact, it should
-   * not be in order to allow the desired capitalization to be preserved).
-   *
-   * @param  value                 The ASN.1 octet string containing the value
-   *                               to decode (it does not need to be
-   *                               normalized).
-   * @param  schema                The schema to use to resolve references to
-   *                               other schema elements.
-   * @param  allowUnknownElements  Indicates whether to allow values that
-   *                               reference a superior class or required or
-   *                               optional attribute types which are not
-   *                               defined in the server schema.  This should
-   *                               only be true when called by
-   *                               {@code valueIsAcceptable}.
-   *
-   * @return  The decoded objectclass definition.
-   *
-   * @throws  DirectoryException  If the provided value cannot be decoded as an
-   *                              objectclass definition.
-   */
-  public static ObjectClass decodeObjectClass(ByteSequence value, Schema schema,
-                                              boolean allowUnknownElements)
-         throws DirectoryException
-  {
-    // Get string representations of the provided value using the provided form
-    // and with all lowercase characters.
-    String valueStr = value.toString();
-    String lowerStr = toLowerCase(valueStr);
-    boolean allowExceptions = DirectoryServer.isRunning()?
-                        DirectoryServer.allowAttributeNameExceptions():true;
-    // We'll do this a character at a time.  First, skip over any leading
-    // whitespace.
-    int pos    = 0;
-    int length = valueStr.length();
-    while (pos < length && valueStr.charAt(pos) == ' ')
-    {
-      pos++;
-    }
-
-    if (pos >= length)
-    {
-      // This means that the value was empty or contained only whitespace.  That
-      // is illegal.
-      LocalizableMessage message = ERR_ATTR_SYNTAX_OBJECTCLASS_EMPTY_VALUE.get();
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // The next character must be an open parenthesis.  If it is not, then that
-    // is an error.
-    char c = valueStr.charAt(pos++);
-    if (c != '(')
-    {
-      LocalizableMessage message = ERR_ATTR_SYNTAX_OBJECTCLASS_EXPECTED_OPEN_PARENTHESIS.
-          get(valueStr, pos-1, c);
-      throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Skip over any spaces immediately following the opening parenthesis.
-    while (pos < length && ((c = valueStr.charAt(pos)) == ' '))
-    {
-      pos++;
-    }
-
-    if (pos >= length)
-    {
-      // This means that the end of the value was reached before we could find
-      // the OID.  Ths is illegal.
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // The next set of characters must be the OID.  Strictly speaking, this
-    // should only be a numeric OID, but we'll also allow for the
-    // "ocname-oid" case as well.  Look at the first character to figure out
-    // which we will be using.
-    int oidStartPos = pos;
-    if (isDigit(c))
-    {
-      // This must be a numeric OID.  In that case, we will accept only digits
-      // and periods, but not consecutive periods.
-      boolean lastWasPeriod = false;
-      while (pos < length && ((c = valueStr.charAt(pos++)) != ' '))
-      {
-        if (c == '.')
-        {
-          if (lastWasPeriod)
-          {
-            LocalizableMessage message =
-                ERR_ATTR_SYNTAX_OBJECTCLASS_DOUBLE_PERIOD_IN_NUMERIC_OID.
-                  get(valueStr, pos-1);
-            throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-          }
-          lastWasPeriod = true;
-        }
-        else if (! isDigit(c))
-        {
-          // This must have been an illegal character.
-          LocalizableMessage message =
-              ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR_IN_NUMERIC_OID.
-                get(valueStr, c, pos-1);
-          throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-        }
-        else
-        {
-          lastWasPeriod = false;
-        }
-      }
-    }
-    else
-    {
-      // This must be a "fake" OID.  In this case, we will only accept
-      // alphabetic characters, numeric digits, and the hyphen.
-      while (pos < length && ((c = valueStr.charAt(pos++)) != ' '))
-      {
-        if (isAlpha(c) || isDigit(c) || c == '-' ||
-            (c == '_' && allowExceptions))
-        {
-          // This is fine.  It is an acceptable character.
-        }
-        else
-        {
-          // This must have been an illegal character.
-          LocalizableMessage message =
-              ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR_IN_STRING_OID.
-                get(valueStr, c, pos-1);
-          throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                                       message);
-        }
-      }
-    }
-
-
-    // If we're at the end of the value, then it isn't a valid objectclass
-    // description.  Otherwise, parse out the OID.
-    if (pos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-    String oid = lowerStr.substring(oidStartPos, pos-1);
-
-    // Skip over the space(s) after the OID.
-    while (pos < length && ((c = valueStr.charAt(pos)) == ' '))
-    {
-      pos++;
-    }
-
-    if (pos >= length)
-    {
-      // This means that the end of the value was reached before we could find
-      // the OID.  Ths is illegal.
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // At this point, we should have a pretty specific syntax that describes
-    // what may come next, but some of the components are optional and it would
-    // be pretty easy to put something in the wrong order, so we will be very
-    // flexible about what we can accept.  Just look at the next token, figure
-    // out what it is and how to treat what comes after it, then repeat until
-    // we get to the end of the value.  But before we start, set default values
-    // for everything else we might need to know.
-    String primaryName = oid;
-    List<String> names = new LinkedList<>();
-    String description = null;
-    boolean isObsolete = false;
-    Set<AttributeType> requiredAttributes = new LinkedHashSet<>();
-    Set<AttributeType> optionalAttributes = new LinkedHashSet<>();
-    Set<ObjectClass> superiorClasses = new LinkedHashSet<>();
-    //Default OC Type is STRUCTURAL ( RFC 4512 4.1.1)
-    ObjectClassType objectClassType = ObjectClassType.STRUCTURAL;
-    Map<String, List<String>> extraProperties = new LinkedHashMap<>();
-
-
-    while (true)
-    {
-      StringBuilder tokenNameBuffer = new StringBuilder();
-      pos = readTokenName(valueStr, tokenNameBuffer, pos);
-      String tokenName = tokenNameBuffer.toString();
-      String lowerTokenName = toLowerCase(tokenName);
-      if (tokenName.equals(")"))
-      {
-        // We must be at the end of the value.  If not, then that's a problem.
-        if (pos < length)
-        {
-          LocalizableMessage message =
-              ERR_ATTR_SYNTAX_OBJECTCLASS_UNEXPECTED_CLOSE_PARENTHESIS.
-                get(valueStr, pos-1);
-          throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                                       message);
-        }
-
-        break;
-      }
-      else if (lowerTokenName.equals("name"))
-      {
-        // This specifies the set of names for the objectclass.  It may be a
-        // single name in single quotes, or it may be an open parenthesis
-        // followed by one or more names in single quotes separated by spaces.
-        c = valueStr.charAt(pos++);
-        if (c == '\'')
-        {
-          StringBuilder userBuffer  = new StringBuilder();
-          StringBuilder lowerBuffer = new StringBuilder();
-          pos = readQuotedString(valueStr, lowerStr, userBuffer, lowerBuffer, pos-1);
-          primaryName = userBuffer.toString();
-          names.add(primaryName);
-        }
-        else if (c == '(')
-        {
-          StringBuilder userBuffer  = new StringBuilder();
-          StringBuilder lowerBuffer = new StringBuilder();
-          pos = readQuotedString(valueStr, lowerStr, userBuffer, lowerBuffer,
-                                 pos);
-          primaryName = userBuffer.toString();
-          names.add(primaryName);
-
-
-          while (true)
-          {
-            if (valueStr.charAt(pos) == ')')
-            {
-              // Skip over any spaces after the parenthesis.
-              pos++;
-              while (pos < length && ((c = valueStr.charAt(pos)) == ' '))
-              {
-                pos++;
-              }
-
-              break;
-            }
-            else
-            {
-              userBuffer  = new StringBuilder();
-              lowerBuffer = new StringBuilder();
-
-              pos = readQuotedString(valueStr, lowerStr, userBuffer,
-                                     lowerBuffer, pos);
-              names.add(userBuffer.toString());
-            }
-          }
-        }
-        else
-        {
-          // This is an illegal character.
-          LocalizableMessage message = ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR.get(valueStr, c, pos-1);
-          throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                                       message);
-        }
-        //RFC 2251: A specification may also assign one or more textual names
-        //for an attribute type.  These names MUST begin with a letter, and
-        //only contain ASCII letters, digit characters and hyphens.
-        //Iterate over all the names and throw an exception if it is invalid.
-        for(String name : names)
-        {
-          for(int index=0; index < name.length(); index++)
-          {
-            char ch = name.charAt(index);
-            switch(ch)
-            {
-              case '-':
-              //hyphen is allowed but not as the first byte.
-                if (index==0)
-                {
-                  throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                      ERR_OC_SYNTAX_ATTR_ILLEGAL_INITIAL_DASH.get(value));
-                }
-                break;
-              case '_':
-              // This will never be allowed as the first character.  It
-              // may be allowed for subsequent characters if the attribute
-              // name exceptions option is enabled.
-                if (index==0)
-                {
-                  LocalizableMessage msg = ERR_OC_SYNTAX_ATTR_ILLEGAL_INITIAL_UNDERSCORE
-                      .get(value, ATTR_ALLOW_ATTRIBUTE_NAME_EXCEPTIONS);
-                  throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, msg);
-                }
-                else if (!allowExceptions)
-                {
-                  LocalizableMessage msg = ERR_OC_SYNTAX_ATTR_ILLEGAL_UNDERSCORE_CHAR.
-                        get(value, ATTR_ALLOW_ATTRIBUTE_NAME_EXCEPTIONS);
-                  throw new DirectoryException(
-                          ResultCode.INVALID_ATTRIBUTE_SYNTAX, msg);
-                }
-                break;
-
-              default:
-              //Only digits and ascii letters are allowed but the first byte
-              //can not be a digit.
-                if(index ==0 && isDigit(ch) && !allowExceptions)
-                {
-                  LocalizableMessage message = ERR_OC_SYNTAX_ATTR_ILLEGAL_INITIAL_DIGIT.
-                    get(value, ch, ATTR_ALLOW_ATTRIBUTE_NAME_EXCEPTIONS);
-                  throw new DirectoryException(
-                          ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-                }
-                else if (!(('0'<=ch && ch<='9')
-                    || ('A'<=ch && ch<='Z')
-                    || ('a'<=ch && ch<='z')))
-                {
-                  throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                      ERR_OC_SYNTAX_ATTR_ILLEGAL_CHAR.get(value, ch, index));
-                }
-                break;
-            }
-          }
-
-        }
-      }
-      else if (lowerTokenName.equals("desc"))
-      {
-        // This specifies the description for the objectclass.  It is an
-        // arbitrary string of characters enclosed in single quotes.
-        StringBuilder descriptionBuffer = new StringBuilder();
-        pos = readQuotedString(valueStr, descriptionBuffer, pos);
-        description = descriptionBuffer.toString();
-      }
-      else if (lowerTokenName.equals("obsolete"))
-      {
-        // This indicates whether the objectclass should be considered obsolete.
-        // We do not need to do any more parsing for this token.
-        isObsolete = true;
-      }
-      else if (lowerTokenName.equals("sup"))
-      {
-        // This specifies the name or OID of the superior objectclass from
-        //  which this objectclass should inherit its properties. As per
-        //  RFC 4512 (4.1.1), expect an oidlist here. It may be a single name
-        //  or OID (not in quotes) , or it may be an open parenthesis followed
-        // by one or more names separated by spaces  and the dollar sign
-        //  character, followed by a closing parenthesis.
-        c = valueStr.charAt(pos++);
-        LinkedList<ObjectClass> listSupOCs = new LinkedList<>();
-        if(c == '(')
-        {
-          while(true)
-          {
-            StringBuilder woidBuffer = new StringBuilder();
-            pos = readWOID(lowerStr, woidBuffer, pos);
-            String oidStr = woidBuffer.toString();
-            ObjectClass supOC = schema.getObjectClass(oidStr);
-            if (supOC == null)
-            {
-              if (allowUnknownElements)
-              {
-                supOC =
-                  DirectoryServer.getDefaultObjectClass(woidBuffer.toString());
-              }
-              else
-              {
-                // This is bad because we don't know what the superior oc
-                // is so we can't base this objectclass on it.
-                LocalizableMessage message =
-                    WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_SUPERIOR_CLASS.get(oid, woidBuffer);
-                throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION, message);
-              }
-            }
-
-            listSupOCs.add(supOC);
-            // The next character must be either a dollar sign or a closing
-            // parenthesis.
-            c = valueStr.charAt(pos++);
-            if (c == ')')
-            {
-              // This denotes the end of the list.
-              break;
-            }
-            else if (c != '$')
-            {
-              LocalizableMessage message = ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR.get(valueStr, c, pos-1);
-              throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                                           message);
-            }
-          }
-        }
-        else
-        {
-          StringBuilder woidBuffer = new StringBuilder();
-          pos = readWOID(lowerStr, woidBuffer, pos-1);
-          ObjectClass superiorClass =
-                  schema.getObjectClass(woidBuffer.toString());
-          if (superiorClass == null)
-          {
-            if (allowUnknownElements)
-            {
-              superiorClass =
-                DirectoryServer.getDefaultObjectClass(woidBuffer.toString());
-            }
-            else
-            {
-              // This is bad because we don't know what the superior oc
-              // is so we can't base this objectclass on it.
-              LocalizableMessage message =
-                  WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_SUPERIOR_CLASS.get(oid, woidBuffer);
-              throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION, message);
-            }
-          }
-          listSupOCs.add(superiorClass);
-        }
-        superiorClasses.addAll(listSupOCs);
-      }
-      else if (lowerTokenName.equals("abstract"))
-      {
-        // This indicates that entries must not include this objectclass unless
-        // they also include a non-abstract objectclass that inherits from this
-        // class.  We do not need any more parsing for this token.
-        objectClassType = ObjectClassType.ABSTRACT;
-      }
-      else if (lowerTokenName.equals("structural"))
-      {
-        // This indicates that this is a structural objectclass.  We do not need
-        // any more parsing for this token.
-        objectClassType = ObjectClassType.STRUCTURAL;
-      }
-      else if (lowerTokenName.equals("auxiliary"))
-      {
-        // This indicates that this is an auxiliary objectclass.  We do not need
-        // any more parsing for this token.
-        objectClassType = ObjectClassType.AUXILIARY;
-      }
-      else if (lowerTokenName.equals("must"))
-      {
-        LinkedList<AttributeType> attrs = new LinkedList<>();
-
-        // This specifies the set of required attributes for the objectclass.
-        // It may be a single name or OID (not in quotes), or it may be an
-        // open parenthesis followed by one or more names separated by spaces
-        // and the dollar sign character, followed by a closing parenthesis.
-        c = valueStr.charAt(pos++);
-        if (c == '(')
-        {
-          while (true)
-          {
-            StringBuilder woidBuffer = new StringBuilder();
-            pos = readWOID(lowerStr, woidBuffer, pos);
-            attrs.add(getAttributeType(schema, allowUnknownElements, oid, woidBuffer,
-                WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_REQUIRED_ATTR));
-
-            // The next character must be either a dollar sign or a closing parenthesis.
-            c = valueStr.charAt(pos++);
-            if (c == ')')
-            {
-              // This denotes the end of the list.
-              break;
-            }
-            else if (c != '$')
-            {
-              LocalizableMessage message = ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR.get(valueStr, c, pos-1);
-              throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                                           message);
-            }
-          }
-        }
-        else
-        {
-          StringBuilder woidBuffer = new StringBuilder();
-          pos = readWOID(lowerStr, woidBuffer, pos-1);
-          attrs.add(getAttributeType(schema, allowUnknownElements, oid, woidBuffer,
-              WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_REQUIRED_ATTR));
-        }
-
-        requiredAttributes.addAll(attrs);
-      }
-      else if (lowerTokenName.equals("may"))
-      {
-        LinkedList<AttributeType> attrs = new LinkedList<>();
-
-        // This specifies the set of optional attributes for the objectclass.
-        // It may be a single name or OID (not in quotes), or it may be an
-        // open parenthesis followed by one or more names separated by spaces
-        // and the dollar sign character, followed by a closing parenthesis.
-        c = valueStr.charAt(pos++);
-        if (c == '(')
-        {
-          while (true)
-          {
-            StringBuilder woidBuffer = new StringBuilder();
-            pos = readWOID(lowerStr, woidBuffer, pos);
-            attrs.add(getAttributeType(schema, allowUnknownElements, oid, woidBuffer,
-                WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_OPTIONAL_ATTR));
-
-            // The next character must be either a dollar sign or a closing parenthesis.
-            c = valueStr.charAt(pos++);
-            if (c == ')')
-            {
-              // This denotes the end of the list.
-              break;
-            }
-            else if (c != '$')
-            {
-              LocalizableMessage message = ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR.get(valueStr, c, pos-1);
-              throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                                           message);
-            }
-          }
-        }
-        else
-        {
-          StringBuilder woidBuffer = new StringBuilder();
-          pos = readWOID(lowerStr, woidBuffer, pos-1);
-          attrs.add(getAttributeType(schema, allowUnknownElements, oid, woidBuffer,
-              WARN_ATTR_SYNTAX_OBJECTCLASS_UNKNOWN_OPTIONAL_ATTR));
-        }
-
-        optionalAttributes.addAll(attrs);
-      }
-      else
-      {
-        // This must be a non-standard property and it must be followed by
-        // either a single value in single quotes or an open parenthesis
-        // followed by one or more values in single quotes separated by spaces
-        // followed by a close parenthesis.
-        List<String> valueList = new LinkedList<>();
-        pos = readExtraParameterValues(valueStr, valueList, pos);
-        extraProperties.put(tokenName, valueList);
-      }
-    }
-
-    //If SUP is not specified, use TOP.
-    ObjectClass top = DirectoryServer.getTopObjectClass();
-    if(superiorClasses.isEmpty() && !top.getOID().equals(oid))
-    {
-      superiorClasses.add(top);
-    }
-    else
-    {
-      for(ObjectClass superiorClass : superiorClasses)
-      {
-        // Make sure that the inheritance configuration is acceptable.
-        ObjectClassType superiorType = superiorClass.getObjectClassType();
-        switch (objectClassType)
-        {
-          case ABSTRACT:
-            // Abstract classes may only inherit from other abstract classes.
-            if (superiorType != ObjectClassType.ABSTRACT)
-            {
-              LocalizableMessage message =
-                WARN_ATTR_SYNTAX_OBJECTCLASS_INVALID_SUPERIOR_TYPE.
-                  get(oid, objectClassType, superiorType, superiorClass.getNameOrOID());
-              throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION,
-                                           message);
-            }
-            break;
-
-          case AUXILIARY:
-            // Auxiliary classes may only inherit from abstract classes or other
-            // auxiliary classes.
-            if (superiorType != ObjectClassType.ABSTRACT &&
-                superiorType != ObjectClassType.AUXILIARY)
-            {
-              LocalizableMessage message =
-                WARN_ATTR_SYNTAX_OBJECTCLASS_INVALID_SUPERIOR_TYPE.
-                  get(oid, objectClassType, superiorType,
-                        superiorClass.getNameOrOID());
-              throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION,
-                                           message);
-            }
-            break;
-
-          case STRUCTURAL:
-            // Structural classes may only inherit from abstract classes or
-            // other structural classes.
-            if (superiorType != ObjectClassType.ABSTRACT &&
-                superiorType != ObjectClassType.STRUCTURAL)
-            {
-              LocalizableMessage message =
-                WARN_ATTR_SYNTAX_OBJECTCLASS_INVALID_SUPERIOR_TYPE.
-                  get(oid, objectClassType, superiorType,
-                        superiorClass.getNameOrOID());
-              throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION,
-                                           message);
-            }
-
-            // Structural classes must have the "top" objectclass somewhere in
-            // the superior chain.
-            if (! superiorChainIncludesTop(superiorClass))
-            {
-              LocalizableMessage message =
-                WARN_ATTR_SYNTAX_OBJECTCLASS_STRUCTURAL_SUPERIOR_NOT_TOP.
-                    get(oid);
-              throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION,
-                                           message);
-            }
-            break;
-        }
-      }
-    }
-
-    CommonSchemaElements.checkSafeProperties(extraProperties);
-
-    return new ObjectClass(value.toString(), primaryName, names, oid,
-                           description, superiorClasses, requiredAttributes,
-                           optionalAttributes, objectClassType, isObsolete,
-                           extraProperties);
-  }
-
-  private static AttributeType getAttributeType(Schema schema, boolean allowUnknownElements, String oid,
-      StringBuilder woidBuffer, Arg2<Object, Object> msg) throws DirectoryException
-  {
-    String woidString = woidBuffer.toString();
-    AttributeType attr = schema.getAttributeType(woidString);
-    if (attr.isPlaceHolder() && !allowUnknownElements)
-    {
-      LocalizableMessage message = msg.get(oid, woidString);
-      throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION, message);
-    }
-    return attr;
-  }
-
-  /**
-   * Reads the next token name from the objectclass definition, skipping over
-   * any leading or trailing spaces, and appends it to the provided buffer.
-   *
-   * @param  valueStr   The string representation of the objectclass definition.
-   * @param  tokenName  The buffer into which the token name will be written.
-   * @param  startPos   The position in the provided string at which to start
-   *                    reading the token name.
-   *
-   * @return  The position of the first character that is not part of the token
-   *          name or one of the trailing spaces after it.
-   *
-   * @throws  DirectoryException  If a problem is encountered while reading the
-   *                              token name.
-   */
-  private static int readTokenName(String valueStr, StringBuilder tokenName,
-                                   int startPos)
-          throws DirectoryException
-  {
-    // Skip over any spaces at the beginning of the value.
-    char c = '\u0000';
-    int  length = valueStr.length();
-    while (startPos < length && ((c = valueStr.charAt(startPos)) == ' '))
-    {
-      startPos++;
-    }
-
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Read until we find the next space.
-    while (startPos < length && ((c = valueStr.charAt(startPos++)) != ' '))
-    {
-      tokenName.append(c);
-    }
-
-
-    // Skip over any trailing spaces after the value.
-    while (startPos < length && ((c = valueStr.charAt(startPos)) == ' '))
-    {
-      startPos++;
-    }
-
-
-    // Return the position of the first non-space character after the token.
-    return startPos;
-  }
-
-  /**
-   * Reads the value of a string enclosed in single quotes, skipping over the
-   * quotes and any leading or trailing spaces, and appending the string to the
-   * provided buffer.
-   *
-   * @param  valueStr     The user-provided representation of the objectclass
-   *                      definition.
-   * @param  valueBuffer  The buffer into which the user-provided representation
-   *                      of the value will be placed.
-   * @param  startPos     The position in the provided string at which to start
-   *                      reading the quoted string.
-   *
-   * @return  The position of the first character that is not part of the quoted
-   *          string or one of the trailing spaces after it.
-   *
-   * @throws  DirectoryException  If a problem is encountered while reading the
-   *                              quoted string.
-   */
-  private static int readQuotedString(String valueStr,
-                                      StringBuilder valueBuffer, int startPos)
-          throws DirectoryException
-  {
-    // Skip over any spaces at the beginning of the value.
-    char c = '\u0000';
-    int  length = valueStr.length();
-    while (startPos < length && ((c = valueStr.charAt(startPos)) == ' '))
-    {
-      startPos++;
-    }
-
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // The next character must be a single quote.
-    if (c != '\'')
-    {
-      LocalizableMessage message = WARN_ATTR_SYNTAX_OBJECTCLASS_EXPECTED_QUOTE_AT_POS.get(
-          valueStr,startPos, c);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Read until we find the closing quote.
-    startPos++;
-    while (startPos < length && ((c = valueStr.charAt(startPos)) != '\''))
-    {
-      valueBuffer.append(c);
-      startPos++;
-    }
-
-
-    // Skip over any trailing spaces after the value.
-    startPos++;
-    while (startPos < length && ((c = valueStr.charAt(startPos)) == ' '))
-    {
-      startPos++;
-    }
-
-
-    // If we're at the end of the value, then that's illegal.
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Return the position of the first non-space character after the token.
-    return startPos;
-  }
-
-  /**
-   * Reads the value of a string enclosed in single quotes, skipping over the
-   * quotes and any leading or trailing spaces, and appending the string to the
-   * provided buffer.
-   *
-   * @param  valueStr     The user-provided representation of the objectclass
-   *                      definition.
-   * @param  lowerStr     The all-lowercase representation of the objectclass
-   *                      definition.
-   * @param  userBuffer   The buffer into which the user-provided representation
-   *                      of the value will be placed.
-   * @param  lowerBuffer  The buffer into which the all-lowercase representation
-   *                      of the value will be placed.
-   * @param  startPos     The position in the provided string at which to start
-   *                      reading the quoted string.
-   *
-   * @return  The position of the first character that is not part of the quoted
-   *          string or one of the trailing spaces after it.
-   *
-   * @throws  DirectoryException  If a problem is encountered while reading the
-   *                              quoted string.
-   */
-  private static int readQuotedString(String valueStr, String lowerStr,
-                                      StringBuilder userBuffer,
-                                      StringBuilder lowerBuffer, int startPos)
-          throws DirectoryException
-  {
-    // Skip over any spaces at the beginning of the value.
-    char c = '\u0000';
-    int  length = lowerStr.length();
-    while (startPos < length && ((c = lowerStr.charAt(startPos)) == ' '))
-    {
-      startPos++;
-    }
-
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(lowerStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // The next character must be a single quote.
-    if (c != '\'')
-    {
-      LocalizableMessage message = WARN_ATTR_SYNTAX_OBJECTCLASS_EXPECTED_QUOTE_AT_POS.get(
-          valueStr,startPos, c);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Read until we find the closing quote.
-    startPos++;
-    while (startPos < length && ((c = lowerStr.charAt(startPos)) != '\''))
-    {
-      lowerBuffer.append(c);
-      userBuffer.append(valueStr.charAt(startPos));
-      startPos++;
-    }
-
-
-    // Skip over any trailing spaces after the value.
-    startPos++;
-    while (startPos < length && ((c = lowerStr.charAt(startPos)) == ' '))
-    {
-      startPos++;
-    }
-
-
-    // If we're at the end of the value, then that's illegal.
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(lowerStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Return the position of the first non-space character after the token.
-    return startPos;
-  }
-
-  /**
-   * Reads the attribute type/objectclass description or numeric OID from the
-   * provided string, skipping over any leading or trailing spaces, and
-   * appending the value to the provided buffer.
-   *
-   * @param  lowerStr    The string from which the name or OID is to be read.
-   * @param  woidBuffer  The buffer into which the name or OID should be
-   *                     appended.
-   * @param  startPos    The position at which to start reading.
-   *
-   * @return  The position of the first character after the name or OID that is
-   *          not a space.
-   *
-   * @throws  DirectoryException  If a problem is encountered while reading the
-   *                              name or OID.
-   */
-  private static int readWOID(String lowerStr, StringBuilder woidBuffer,
-                              int startPos)
-          throws DirectoryException
-  {
-    // Skip over any spaces at the beginning of the value.
-    char c = '\u0000';
-    int  length = lowerStr.length();
-    boolean allowExceptions = DirectoryServer.isRunning()?
-                        DirectoryServer.allowAttributeNameExceptions():true;
-    while (startPos < length && ((c = lowerStr.charAt(startPos)) == ' '))
-    {
-      startPos++;
-    }
-
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(lowerStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // The next character must be either numeric (for an OID) or alphabetic (for
-    // an objectclass description).
-    if (isDigit(c))
-    {
-      // This must be a numeric OID.  In that case, we will accept only digits
-      // and periods, but not consecutive periods.
-      boolean lastWasPeriod = false;
-      while (startPos < length && ((c = lowerStr.charAt(startPos++)) != ' '))
-      {
-        if (c == '.')
-        {
-          if (lastWasPeriod)
-          {
-            LocalizableMessage message =
-              ERR_ATTR_SYNTAX_OBJECTCLASS_DOUBLE_PERIOD_IN_NUMERIC_OID.
-                  get(lowerStr, startPos-1);
-            throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-          }
-          woidBuffer.append(c);
-          lastWasPeriod = true;
-        }
-        else if (!isDigit(c) && (!allowExceptions || (!isAlpha(c) && c != '-' && c != '_')))
-        {
-          // Technically, this must be an illegal character.  However, it is
-          // possible that someone just got sloppy and did not include a space
-          // between the name/OID and a closing parenthesis.  In that case,
-          // we'll assume it's the end of the value.  What's more, we'll have
-          // to prematurely return to nasty side effects from stripping off
-          // additional characters.
-          if (c == ')')
-          {
-            return startPos-1;
-          }
-
-          // This must have been an illegal character.
-          LocalizableMessage message =
-            ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR_IN_NUMERIC_OID.
-                get(lowerStr, c, startPos-1);
-          throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-        }
-        else
-        {
-          woidBuffer.append(c);
-          lastWasPeriod = false;
-        }
-      }
-    }
-    else if (isAlpha(c))
-    {
-      // This must be an objectclass description.  In this case, we will only
-      // accept alphabetic characters, numeric digits, and the hyphen.
-      while (startPos < length && ((c = lowerStr.charAt(startPos++)) != ' '))
-      {
-        if (isAlpha(c) || isDigit(c) || c == '-' ||
-            (c == '_' && allowExceptions))
-        {
-          woidBuffer.append(c);
-        }
-        else
-        {
-          // Technically, this must be an illegal character.  However, it is
-          // possible that someone just got sloppy and did not include a space
-          // between the name/OID and a closing parenthesis.  In that case,
-          // we'll assume it's the end of the value.  What's more, we'll have
-          // to prematurely return to nasty side effects from stripping off
-          // additional characters.
-          if (c == ')')
-          {
-            return startPos-1;
-          }
-
-          // This must have been an illegal character.
-          LocalizableMessage message =
-            ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR_IN_STRING_OID.
-                get(lowerStr, c, startPos-1);
-          throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-        }
-      }
-    }
-    else
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR.get(lowerStr, c, startPos);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Skip over any trailing spaces after the value.
-    while (startPos < length && ((c = lowerStr.charAt(startPos)) == ' '))
-    {
-      startPos++;
-    }
-
-
-    // If we're at the end of the value, then that's illegal.
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(lowerStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Return the position of the first non-space character after the token.
-    return startPos;
-  }
-
-  /**
-   * Reads the value for an "extra" parameter.  It will handle a single unquoted
-   * word (which is technically illegal, but we'll allow it), a single quoted
-   * string, or an open parenthesis followed by a space-delimited set of quoted
-   * strings or unquoted words followed by a close parenthesis.
-   *
-   * @param  valueStr   The string containing the information to be read.
-   * @param  valueList  The list of "extra" parameter values read so far.
-   * @param  startPos   The position in the value string at which to start
-   *                    reading.
-   *
-   * @return  The "extra" parameter value that was read.
-   *
-   * @throws  DirectoryException  If a problem occurs while attempting to read
-   *                              the value.
-   */
-  private static int readExtraParameterValues(String valueStr,
-                          List<String> valueList, int startPos)
-          throws DirectoryException
-  {
-    // Skip over any leading spaces.
-    int length = valueStr.length();
-    char c = valueStr.charAt(startPos++);
-    while (startPos < length && c == ' ')
-    {
-      c = valueStr.charAt(startPos++);
-    }
-
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    // Look at the next character.  If it is a quote, then parse until the next
-    // quote and end.  If it is an open parenthesis, then parse individual
-    // values until the close parenthesis and end.  Otherwise, parse until the
-    // next space and end.
-    if (c == '\'')
-    {
-      // Parse until the closing quote.
-      StringBuilder valueBuffer = new StringBuilder();
-      while (startPos < length && ((c = valueStr.charAt(startPos++)) != '\''))
-      {
-        valueBuffer.append(c);
-      }
-
-      valueList.add(valueBuffer.toString());
-    }
-    else if (c == '(')
-    {
-      startPos++;
-      while (true)
-      {
-        // Skip over any leading spaces;
-        while (startPos < length && ((c = valueStr.charAt(startPos)) == ' '))
-        {
-          startPos++;
-        }
-
-        if (startPos >= length)
-        {
-          LocalizableMessage message =
-              ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-          throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                                       message);
-        }
-
-
-        if (c == ')')
-        {
-          // This is the end of the list.
-          startPos++;
-          break;
-        }
-        else if (c == '(')
-        {
-          // This is an illegal character.
-          LocalizableMessage message = ERR_ATTR_SYNTAX_OBJECTCLASS_ILLEGAL_CHAR.get(valueStr, c, startPos);
-          throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
-                                       message);
-        }
-        else
-        {
-          // We'll recursively call this method to deal with this.
-          startPos = readExtraParameterValues(valueStr, valueList, startPos);
-        }
-      }
-    }
-    else
-    {
-      // Parse until the next space.
-      StringBuilder valueBuffer = new StringBuilder();
-      while (startPos < length && ((c = valueStr.charAt(startPos++)) != ' '))
-      {
-        valueBuffer.append(c);
-      }
-
-      valueList.add(valueBuffer.toString());
-    }
-
-    // Skip over any trailing spaces.
-    while (startPos < length && valueStr.charAt(startPos) == ' ')
-    {
-      startPos++;
-    }
-
-    if (startPos >= length)
-    {
-      LocalizableMessage message =
-          ERR_ATTR_SYNTAX_OBJECTCLASS_TRUNCATED_VALUE.get(valueStr);
-      throw new DirectoryException(
-              ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
-    }
-
-
-    return startPos;
-  }
-
-  /**
-   * Indicates whether the provided objectclass or any of its superiors is equal
-   * to the "top" objectclass.
-   *
-   * @param  superiorClass  The objectclass for which to make the determination.
-   *
-   * @return  {@code true} if the provided class or any of its superiors is
-   *          equal to the "top" objectclass, or {@code false} if not.
-   */
-  private static boolean superiorChainIncludesTop(ObjectClass superiorClass)
-  {
-    if (superiorClass == null)
-    {
-      return false;
-    }
-    else if (superiorClass.hasName(OC_TOP))
-    {
-      return true;
-    }
-    else
-    {
-      for(ObjectClass oc : superiorClass.getSuperiorClasses())
-      {
-        if(superiorChainIncludesTop(oc))
-        {
-          return true;
-        }
-      }
-    }
-    return false;
-  }
-}
-
+}
\ No newline at end of file
diff --git a/opendj-server-legacy/src/main/java/org/opends/server/types/Schema.java b/opendj-server-legacy/src/main/java/org/opends/server/types/Schema.java
index a52445f..c04aeea 100644
--- a/opendj-server-legacy/src/main/java/org/opends/server/types/Schema.java
+++ b/opendj-server-legacy/src/main/java/org/opends/server/types/Schema.java
@@ -67,8 +67,6 @@
 import org.opends.server.schema.DITContentRuleSyntax;
 import org.opends.server.schema.DITStructureRuleSyntax;
 import org.opends.server.schema.NameFormSyntax;
-import org.opends.server.schema.ObjectClassSyntax;
-import org.opends.server.schema.SomeSchemaElement;
 import org.opends.server.util.Base64;
 import org.opends.server.util.ServerConstants;
 import org.opends.server.util.StaticUtils;
@@ -281,6 +279,37 @@
   }
 
   /**
+   * Parses an object class from its provided definition.
+   *
+   * @param definition
+   *          The definition of the object class
+   * @return the object class
+   * @throws DirectoryException
+   *           If an error occurs
+   */
+  public ObjectClass parseObjectClass(final String definition) throws DirectoryException
+  {
+    try
+    {
+      SchemaBuilder builder = new SchemaBuilder(schemaNG);
+      builder.addObjectClass(definition, true);
+      org.forgerock.opendj.ldap.schema.Schema newSchema = builder.toSchema();
+      rejectSchemaWithWarnings(newSchema);
+      return newSchema.getObjectClass(parseObjectClassOID(definition));
+    }
+    catch (UnknownSchemaElementException e)
+    {
+      // this should never happen
+      LocalizableMessage msg = ERR_OBJECT_CLASS_CANNOT_REGISTER.get(definition);
+      throw new DirectoryException(ResultCode.UNWILLING_TO_PERFORM, msg, e);
+    }
+    catch (LocalizedIllegalArgumentException e)
+    {
+      throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, e.getMessageObject(), e);
+    }
+  }
+
+  /**
    * Parses an attribute type from its provided definition.
    *
    * @param definition
@@ -478,6 +507,11 @@
     }
   }
 
+  private String parseObjectClassOID(String definition) throws DirectoryException
+  {
+    return parseOID(definition, ResultCode.INVALID_ATTRIBUTE_SYNTAX, ERR_ATTR_SYNTAX_OBJECTCLASS_EMPTY_VALUE);
+  }
+
   private String parseAttributeTypeOID(String definition) throws DirectoryException
   {
     return parseOID(definition, ResultCode.INVALID_ATTRIBUTE_SYNTAX, ERR_ATTR_SYNTAX_ATTRTYPE_EMPTY_VALUE);
@@ -694,46 +728,110 @@
     return getSchemaNG().getObjectClass(lowerName);
   }
 
-
+  /**
+   * Registers the provided objectclass definition with this schema.
+   *
+   * @param objectClass
+   *          The objectclass to register with this schema.
+   * @param overwriteExisting
+   *          Indicates whether to overwrite an existing mapping if there are any conflicts (i.e.,
+   *          another objectclass with the same OID or name).
+   * @throws DirectoryException
+   *           If a conflict is encountered and the {@code overwriteExisting} flag is set to
+   *           {@code false}.
+   */
+  public void registerObjectClass(ObjectClass objectClass, boolean overwriteExisting) throws DirectoryException
+  {
+    String schemaFile = getSchemaFileName(objectClass);
+    registerObjectClass(objectClass, schemaFile, overwriteExisting);
+  }
 
   /**
    * Registers the provided objectclass definition with this schema.
    *
-   * @param  objectClass        The objectclass to register with this
-   *                            schema.
-   * @param  overwriteExisting  Indicates whether to overwrite an
-   *                            existing mapping if there are any
-   *                            conflicts (i.e., another objectclass
-   *                            with the same OID or name).
-   *
-   * @throws  DirectoryException  If a conflict is encountered and the
-   *                              <CODE>overwriteExisting</CODE> flag
-   *                              is set to <CODE>false</CODE>.
+   * @param objectClass
+   *          The objectclass to register with this schema.
+   * @param schemaFile
+   *          The schema file where this definition belongs, maybe {@code null}
+   * @param overwriteExisting
+   *          Indicates whether to overwrite an existing mapping if there are any conflicts (i.e.,
+   *          another objectclass with the same OID or name).
+   * @throws DirectoryException
+   *           If a conflict is encountered and the {@code overwriteExisting} flag is set to
+   *           {@code false}.
    */
-  public void registerObjectClass(ObjectClass objectClass,
-                                  boolean overwriteExisting)
+  public void registerObjectClass(ObjectClass objectClass, String schemaFile, boolean overwriteExisting)
          throws DirectoryException
   {
     exclusiveLock.lock();
     try
     {
       SchemaBuilder builder = new SchemaBuilder(schemaNG);
-      ObjectClass.Builder b = builder.buildObjectClass(objectClass);
-      String schemaFile = getSchemaFileName(objectClass);
-      if (schemaFile != null)
+      registerObjectClass0(builder, objectClass, schemaFile, overwriteExisting);
+      switchSchema(builder.toSchema());
+    }
+    finally
+    {
+      exclusiveLock.unlock();
+    }
+  }
+
+  private void registerObjectClass0(SchemaBuilder builder, ObjectClass objectClass, String schemaFile,
+      boolean overwriteExisting)
+  {
+    ObjectClass.Builder b = builder.buildObjectClass(objectClass);
+    if (schemaFile != null)
+    {
+      b.removeExtraProperty(SCHEMA_PROPERTY_FILENAME).extraProperties(SCHEMA_PROPERTY_FILENAME, schemaFile);
+    }
+    if (overwriteExisting)
+    {
+      b.addToSchemaOverwrite();
+    }
+    else
+    {
+      b.addToSchema();
+    }
+  }
+
+  /**
+   * Registers a list of object classes from their provided definitions.
+   * <p>
+   * This method allows to do only one schema change for multiple definitions,
+   * thus avoiding the cost (and the issue of stale schema references) of rebuilding a new schema for each definition.
+   *
+   * @param definitions
+   *          The definitions of the object classes
+   * @param schemaFile
+   *          The schema file where these definitions belong, can be {@code null}
+   * @param overwrite
+   *          Indicates whether to overwrite the attribute
+   *          type if it already exists based on OID or name
+   * @throws DirectoryException
+   *            If an error occurs
+   */
+  public void registerObjectClasses(final List<String> definitions, final String schemaFile, final boolean overwrite)
+      throws DirectoryException
+  {
+    exclusiveLock.lock();
+    try
+    {
+      SchemaBuilder builder = new SchemaBuilder(schemaNG);
+      for (String definition : definitions)
       {
-        b.removeExtraProperty(SCHEMA_PROPERTY_FILENAME).extraProperties(SCHEMA_PROPERTY_FILENAME, schemaFile);
-      }
-      if (overwriteExisting)
-      {
-        b.addToSchemaOverwrite();
-      }
-      else
-      {
-        b.addToSchema();
+        String defWithFile = getDefinitionWithSchemaFile(definition, schemaFile);
+        builder.addObjectClass(defWithFile, overwrite);
       }
       switchSchema(builder.toSchema());
     }
+    catch (ConflictingSchemaElementException | UnknownSchemaElementException e)
+    {
+      throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION, e.getMessageObject(), e);
+    }
+    catch (LocalizedIllegalArgumentException e)
+    {
+      throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, e.getMessageObject(), e);
+    }
     finally
     {
       exclusiveLock.unlock();
@@ -1836,13 +1934,9 @@
       // increase the depth for each level of recursion to protect against errors due to circular references.
       final int depth = 0;
 
-      if (element instanceof SomeSchemaElement)
+      if (element instanceof AttributeType)
       {
-        SomeSchemaElement elt = (SomeSchemaElement) element;
-        if (elt.isAttributeType())
-        {
-          rebuildDependentElements(elt.getAttributeType(), depth);
-        }
+        rebuildDependentElements((AttributeType) element, depth);
       }
       else if (element instanceof ObjectClass)
       {
@@ -1903,9 +1997,8 @@
     {
       if (oc.getDeclaredRequiredAttributes().contains(type) || oc.getDeclaredOptionalAttributes().contains(type))
       {
-        ObjectClass newOC = recreateFromDefinition(oc);
         deregisterObjectClass(oc);
-        registerObjectClass(newOC, true);
+        registerObjectClass(oc.toString(), getSchemaFile(oc), true);
         rebuildDependentElements(oc, depth + 1);
       }
     }
@@ -1945,19 +2038,28 @@
     }
   }
 
+  /**
+   * Registers an object class from its provided definition.
+   *
+   * @param definition
+   *          The definition of the object class
+   * @param schemaFile
+   *          The schema file where this definition belongs, may be {@code null}
+   * @param overwriteExisting
+   *          Indicates whether to overwrite the object class
+   *          if it already exists based on OID or name
+   * @throws DirectoryException
+   *            If an error occurs
+   */
+  public void registerObjectClass(String definition, String schemaFile, boolean overwriteExisting)
+      throws DirectoryException
+  {
+    registerObjectClasses(Collections.singletonList(definition), schemaFile, overwriteExisting);
+  }
+
   private void rebuildDependentElements(ObjectClass c, int depth) throws DirectoryException
   {
     circularityCheck(depth, c);
-    for (ObjectClass oc : getObjectClasses())
-    {
-      if (oc.getSuperiorClasses().contains(c))
-      {
-        ObjectClass newOC = recreateFromDefinition(oc);
-        deregisterObjectClass(oc);
-        registerObjectClass(newOC, true);
-        rebuildDependentElements(oc, depth + 1);
-      }
-    }
 
     List<NameForm> mappedForms = nameFormsByOC.get(c);
     if (mappedForms != null)
@@ -2048,15 +2150,6 @@
     return copy;
   }
 
-  private ObjectClass recreateFromDefinition(ObjectClass oc)
-      throws DirectoryException
-  {
-    ByteString value = ByteString.valueOfUtf8(oc.toString());
-    ObjectClass copy = ObjectClassSyntax.decodeObjectClass(value, this, false);
-    setSchemaFile(copy, getSchemaFile(oc));
-    return copy;
-  }
-
   /**
    * Creates a new {@link Schema} object that is a duplicate of this one. It elements may be added
    * and removed from the duplicate without impacting this version.
@@ -2674,4 +2767,34 @@
           ERR_SCHEMA_HAS_WARNINGS.get(warnings.size(), Utils.joinAsString("; ", warnings)));
     }
   }
+
+  /**
+   * Replaces an existing object class by another object class.
+   *
+   * @param objectClass
+   *          Object class to register to the schema.
+   * @param existingClass
+   *          Object class to remove from the schema.
+   * @param schemaFile
+   *          The schema file which the new object class belongs to.
+   * @throws DirectoryException
+   *            If an errors occurs.
+   */
+  public void replaceObjectClass(ObjectClass objectClass, ObjectClass existingClass, String schemaFile)
+      throws DirectoryException
+  {
+    exclusiveLock.lock();
+    try
+    {
+      SchemaBuilder builder = new SchemaBuilder(schemaNG);
+      builder.removeObjectClass(existingClass.getNameOrOID());
+      registerObjectClass0(builder, objectClass, schemaFile, false);
+      switchSchema(builder.toSchema());
+    }
+    finally
+    {
+      exclusiveLock.unlock();
+    }
+    rebuildDependentElements(existingClass);
+  }
 }
diff --git a/opendj-server-legacy/src/messages/org/opends/messages/schema.properties b/opendj-server-legacy/src/messages/org/opends/messages/schema.properties
index 1ba08c8..b6a1466 100644
--- a/opendj-server-legacy/src/messages/org/opends/messages/schema.properties
+++ b/opendj-server-legacy/src/messages/org/opends/messages/schema.properties
@@ -499,4 +499,6 @@
 ERR_SCHEMA_HAS_WARNINGS_341=There should be no warnings on the schema, \
  but instead got %d warnings: %s
 ERR_MATCHING_RULE_USE_CANNOT_REGISTER_342=Matching rule use could not be \
+ registered from definition: %s
+ERR_OBJECT_CLASS_CANNOT_REGISTER_343=Object class could not be \
  registered from definition: %s
\ No newline at end of file
diff --git a/opendj-server-legacy/src/test/java/org/opends/server/schema/GenericSchemaTestCase.java b/opendj-server-legacy/src/test/java/org/opends/server/schema/GenericSchemaTestCase.java
index b0d1f03..e67153b 100644
--- a/opendj-server-legacy/src/test/java/org/opends/server/schema/GenericSchemaTestCase.java
+++ b/opendj-server-legacy/src/test/java/org/opends/server/schema/GenericSchemaTestCase.java
@@ -24,6 +24,7 @@
 import org.forgerock.opendj.ldap.ByteString;
 import org.forgerock.opendj.ldap.schema.AttributeType;
 import org.forgerock.opendj.ldap.schema.MatchingRule;
+import org.forgerock.opendj.ldap.schema.ObjectClass;
 import org.forgerock.opendj.ldap.schema.Syntax;
 import org.opends.server.TestCaseUtils;
 import org.opends.server.core.DirectoryServer;
@@ -31,7 +32,6 @@
 import org.opends.server.types.Entry;
 import org.opends.server.types.LDIFImportConfig;
 import org.opends.server.types.NameForm;
-import org.forgerock.opendj.ldap.schema.ObjectClass;
 import org.opends.server.types.Schema;
 import org.opends.server.util.LDIFReader;
 import org.testng.annotations.BeforeClass;
@@ -40,10 +40,7 @@
 import static org.opends.server.util.ServerConstants.*;
 import static org.testng.Assert.*;
 
-/**
- * This class defines a set of generic tests that may be used to examine the
- * server schema.
- */
+/** This class defines a set of generic tests that may be used to examine the server schema. */
 public class GenericSchemaTestCase
        extends SchemaTestCase
 {
@@ -230,19 +227,18 @@
       }
 
       LDIFImportConfig importConfig = new LDIFImportConfig(f.getAbsolutePath());
-      LDIFReader reader = new LDIFReader(importConfig);
-      Entry e = reader.readEntry();
-      reader.close();
-
-      if (e == null)
+      Entry e;
+      try (LDIFReader reader = new LDIFReader(importConfig))
       {
-        // An empty schema file.  This is OK.
-        continue;
+        e = reader.readEntry();
+        if (e == null)
+        {
+          // An empty schema file. This is OK.
+          continue;
+        }
       }
 
-      AttributeType attrType = DirectoryServer.getAttributeType("objectclasses");
-      assertNotNull(attrType);
-      List<Attribute> attrList = e.getAttribute(attrType);
+      List<Attribute> attrList = e.getAttribute("objectclasses");
       if (attrList.isEmpty())
       {
         // No attribute types in the schema file.  This is OK.
@@ -253,8 +249,7 @@
       {
         for (ByteString v : a)
         {
-          ObjectClass oc = ObjectClassSyntax.decodeObjectClass(
-              v, DirectoryServer.getSchema(), true);
+          ObjectClass oc = DirectoryServer.getSchema().parseObjectClass(v.toString());
           if (! isNumericOID(oc.getOID()))
           {
             invalidOIDs.add(oc.getNameOrOID());
@@ -265,17 +260,13 @@
 
     if (! invalidOIDs.isEmpty())
     {
-      StringBuilder message = new StringBuilder();
-      message.append("All object classes defined in OpenDS must have valid ").append("OIDs assigned.");
-      message.append(EOL);
-      message.append("Object classes without valid OIDs:");
-      message.append(EOL);
+      StringBuilder message = new StringBuilder()
+          .append("All object classes defined in OpenDS must have valid OIDs assigned.").append(EOL)
+          .append("Object classes without valid OIDs:").append(EOL);
       for (String s : invalidOIDs)
       {
-        message.append("- ").append(s);
-        message.append(EOL);
+        message.append("- ").append(s).append(EOL);
       }
-
       throw new AssertionError(message.toString());
     }
   }

--
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