external-software/github_OpenIdentityPlatform_OpenDJ.git

			@@ -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;
			}
			}

			}