/*
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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.ExtensionCfg;
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import org.opends.server.config.ConfigException;
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import org.opends.server.types.InitializationException;
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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 extension.
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*
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* @param <T>
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* The type of extension configuration handled by
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* this extension implementation.
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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=true)
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public abstract class Extension
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<T extends ExtensionCfg>
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{
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/**
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* Initializes this extension based on the
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* information in the provided extension configuration.
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*
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* @param configuration
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* The extension configuration that contains the
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* information to use to initialize this connection
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* handler.
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* @throws ConfigException
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* If an unrecoverable problem arises in the process of
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* performing the initialization as a result of the server
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* configuration.
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* @throws InitializationException
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* If a problem occurs during initialization that is not
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* related to the server configuration.
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*/
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public abstract void initializeExtension(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 extension. It should be possible to call this
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* method on an uninitialized extension instance in order
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* to determine whether the extension would be able to use
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* the provided 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 extension 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 extension, or {@code false} if not.
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*/
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public boolean isConfigurationAcceptable(
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ExtensionCfg 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 extension
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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
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* this extension.
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*
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*/
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public abstract void finalizeExtension();
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}
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