/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the fields enclosed
 * by brackets "[]" replaced with your own identifying information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Portions Copyright 2007 Sun Microsystems, Inc.
 */

package org.opends.server.extensions;

import java.io.Serializable;
import java.util.Map;
import java.util.LinkedHashMap;
import java.util.concurrent.ConcurrentHashMap;

/**
 * This class represents serializable entry cache index structures
 * and supporting data types used for the entry cache persistence.
 * Structurally it should be an inner class of FileSystemEntryCache
 * however due to serialization constraints it has been separated.
 */
class FileSystemEntryCacheIndex implements Serializable {
    static final long serialVersionUID = 4537634108673038611L;

    /**
     * Backend to Checksum/id map for offline state.
     */
    public Map<String,Long> offlineState;

    /**
     * The mapping between entry backends/IDs and DNs.
     */
    public Map<String,Map<Long,String>> backendMap;

    /**
     * The mapping between DNs and IDs.
     */
    public Map<String,Long> dnMap;

    /**
     * Default constructor.
     */
    public FileSystemEntryCacheIndex() {
      offlineState =
          //               <Backend,Long>
          new ConcurrentHashMap<String,Long>();
      backendMap =
          //               <Backend,Map<Long,DN>>
          new LinkedHashMap<String,Map<Long,String>>();
      dnMap      =
          //               <DN,Long>
          new LinkedHashMap<String,Long>();
    }
  }