/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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*/
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package org.opends.server.api;
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import org.opends.messages.Message;
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import java.util.List;
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import org.opends.server.admin.std.server.AttributeSyntaxCfg;
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import org.opends.server.config.ConfigException;
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import org.opends.server.types.InitializationException;
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import org.opends.server.types.ByteSequence;
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import org.opends.messages.MessageBuilder;
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/**
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* This class defines the set of methods and structures that must be
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* implemented by a Directory Server module that implements an
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* attribute syntax.
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*
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* @param <T> The type of configuration handled by this attribute
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* syntax.
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*/
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@org.opends.server.types.PublicAPI(
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stability=org.opends.server.types.StabilityLevel.VOLATILE,
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mayInstantiate=false,
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mayExtend=true,
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mayInvoke=false)
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public abstract class AttributeSyntax<T extends AttributeSyntaxCfg>
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{
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/**
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* Initializes this attribute syntax based on the information in the
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* provided configuration entry.
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*
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* @param configuration The configuration to use to initialize
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* this attribute syntax.
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*
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* @throws ConfigException If an unrecoverable problem arises in
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* the process of performing the
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* initialization.
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*
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* @throws InitializationException If a problem occurs during
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* initialization that is not
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* related to the server
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* configuration.
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*/
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public abstract void initializeSyntax(T configuration)
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throws ConfigException, InitializationException;
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/**
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* Indicates whether the provided configuration is acceptable for
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* this attribute syntax. It should be possible to call this method
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* on an uninitialized attribute syntax instance in order to
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* determine whether the syntax would be able to use the provided
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* configuration.
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* <BR><BR>
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* Note that implementations which use a subclass of the provided
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* configuration class will likely need to cast the configuration
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* to the appropriate subclass type.
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*
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* @param configuration The attribute syntax configuration
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* for which to make the determination.
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* @param unacceptableReasons A list that may be used to hold the
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* reasons that the provided
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* configuration is not acceptable.
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*
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* @return {@code true} if the provided configuration is acceptable
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* for this attribute syntax, or {@code false} if not.
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*/
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public boolean isConfigurationAcceptable(
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AttributeSyntaxCfg configuration,
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List<Message> unacceptableReasons)
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{
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// This default implementation does not perform any special
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// validation. It should be overridden by attribute syntax
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// implementations that wish to perform more detailed validation.
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return true;
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}
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/**
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* Performs any finalization that may be necessary for this
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* attribute syntax. By default, no finalization is performed.
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*/
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public void finalizeSyntax()
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{
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// No implementation required.
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}
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/**
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* Retrieves the common name for this attribute syntax.
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*
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* @return The common name for this attribute syntax.
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*/
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public abstract String getSyntaxName();
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/**
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* Retrieves the OID for this attribute syntax.
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*
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* @return The OID for this attribute syntax.
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*/
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public abstract String getOID();
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/**
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* Retrieves a description for this attribute syntax.
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*
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* @return A description for this attribute syntax.
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*/
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public abstract String getDescription();
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/**
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* Retrieves the default equality matching rule that will be used
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* for attributes with this syntax.
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*
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* @return The default equality matching rule that will be used for
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* attributes with this syntax, or {@code null} if equality
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* matches will not be allowed for this type by default.
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*/
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public abstract EqualityMatchingRule getEqualityMatchingRule();
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/**
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* Retrieves the default ordering matching rule that will be used
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* for attributes with this syntax.
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*
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* @return The default ordering matching rule that will be used for
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* attributes with this syntax, or {@code null} if ordering
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* matches will not be allowed for this type by default.
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*/
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public abstract OrderingMatchingRule getOrderingMatchingRule();
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/**
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* Retrieves the default substring matching rule that will be used
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* for attributes with this syntax.
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*
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* @return The default substring matching rule that will be used
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* for attributes with this syntax, or {@code null} if
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* substring matches will not be allowed for this type by
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* default.
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*/
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public abstract SubstringMatchingRule getSubstringMatchingRule();
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/**
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* Retrieves the default approximate matching rule that will be used
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* for attributes with this syntax.
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*
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* @return The default approximate matching rule that will be used
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* for attributes with this syntax, or {@code null} if
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* approximate matches will not be allowed for this type by
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* default.
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*/
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public abstract ApproximateMatchingRule
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getApproximateMatchingRule();
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/**
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* Indicates whether the provided value is acceptable for use in an
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* attribute with this syntax. If it is not, then the reason may be
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* appended to the provided buffer.
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*
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* @param value The value for which to make the
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* determination.
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* @param invalidReason The buffer to which the invalid reason
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* should be appended.
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*
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* @return {@code true} if the provided value is acceptable for use
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* with this syntax, or {@code false} if not.
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*/
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public abstract boolean valueIsAcceptable(ByteSequence value,
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MessageBuilder invalidReason);
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/**
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* Indicates whether this attribute syntax is a binary one.
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* @return {@code true} if it is a binary syntax rule
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* , or {@code false} if not.
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*/
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public abstract boolean isBinary();
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/**
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* Retrieves the hash code for this attribute syntax. It will be
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* calculated as the sum of the characters in the OID.
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*
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* @return The hash code for this attribute syntax.
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*/
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public final int hashCode()
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{
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int hashCode = 0;
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String oidString = getOID();
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int oidLength = oidString.length();
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for (int i=0; i < oidLength; i++)
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{
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hashCode += oidString.charAt(i);
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}
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return hashCode;
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}
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/**
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* Indicates whether the provided object is equal to this attribute
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* syntax. The provided object will be considered equal to this
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* attribute syntax only if it is an attribute syntax with the same
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* OID.
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*
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* @param o The object for which to make the determination.
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*
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* @return {@code true} if the provided object is equal to this
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* attribute syntax, or {@code false} if it is not.
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*/
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public final boolean equals(Object o)
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{
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if (o == null)
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{
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return false;
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}
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if (this == o)
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{
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return true;
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}
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if (! (o instanceof AttributeSyntax))
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{
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return false;
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}
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return getOID().equals(((AttributeSyntax) o).getOID());
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}
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/**
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* Retrieves a string representation of this attribute syntax in the
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* format defined in RFC 2252.
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*
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* @return A string representation of this attribute syntax in the
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* format defined in RFC 2252.
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*/
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public final String toString()
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{
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StringBuilder buffer = new StringBuilder();
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toString(buffer);
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return buffer.toString();
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}
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/**
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* Appends a string representation of this attribute syntax in the
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* format defined in RFC 2252 to the provided buffer.
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*
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* @param buffer The buffer to which the information should be
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* appended.
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*/
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public final void toString(StringBuilder buffer)
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{
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buffer.append("( ");
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buffer.append(getOID());
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String description = getDescription();
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if ((description == null) || (description.length() == 0))
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{
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buffer.append(" )");
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}
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else
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{
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buffer.append(" DESC '");
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buffer.append(description);
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buffer.append("' )");
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}
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}
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}
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