/*
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 *
 * 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:
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 *
 *
 *      Copyright 2008-2010 Sun Microsystems, Inc.
 */

package org.opends.guitools.controlpanel.datamodel;

import java.util.Collections;
import java.util.List;

import org.opends.server.admin.std.meta.LocalDBVLVIndexCfgDefn.Scope;
import org.opends.server.types.DN;

/**
 * The class used to describe the VLV index configuration.
 *
 */
public class VLVIndexDescriptor extends AbstractIndexDescriptor
{
  private DN baseDN;
  private Scope scope;
  private String filter;
  private List<VLVSortOrder> sortOrder = Collections.emptyList();
  private int maxBlockSize;
  private int hashCode;

  /**
   * Constructor for the VLVIndexDescriptor.
   * @param name the name of the index.
   * @param backend the backend where the index is defined.
   * @param baseDN the baseDN of the search indexed by the VLV index.
   * @param scope the scope of the search indexed by the VLV index.
   * @param filter the filter or the search indexed by the VLV index.
   * @param sortOrder the sort order list of the VLV index.
   * @param maxBlockSize the maximum block size of the VLV index.
   */
  public VLVIndexDescriptor(String name, BackendDescriptor backend, DN baseDN,
      Scope scope, String filter, List<VLVSortOrder> sortOrder,
      int maxBlockSize)
  {
    super(name, backend);
    this.baseDN = baseDN;
    this.scope = scope;
    this.filter = filter;
    this.sortOrder = Collections.unmodifiableList(sortOrder);
    this.maxBlockSize = maxBlockSize;

    recalculateHashCode();
  }

  /**
   * {@inheritDoc}
   */
  public int compareTo(AbstractIndexDescriptor o)
  {
    return getName().toLowerCase().compareTo(o.getName().toLowerCase());
  }

  /**
   * {@inheritDoc}
   */
  public int hashCode()
  {
    return hashCode;
  }

  /**
   * Returns the baseDN of the search indexed by the VLV index.
   * @return the baseDN of the search indexed by the VLV index.
   */
  public DN getBaseDN()
  {
    return baseDN;
  }

  /**
   * Returns the filter of the search indexed by the VLV index.
   * @return the filter of the search indexed by the VLV index.
   */
  public String getFilter()
  {
    return filter;
  }

  /**
   * Returns the scope of the search indexed by the VLV index.
   * @return the scope of the search indexed by the VLV index.
   */
  public Scope getScope()
  {
    return scope;
  }

  /**
   * Returns the sort order list of the VLV index.
   * @return the sort order list of the VLV index.
   */
  public List<VLVSortOrder> getSortOrder()
  {
    return sortOrder;
  }

  /**
   * {@inheritDoc}
   */
  public boolean equals(Object o)
  {
    boolean equals = o == this;
    if (!equals)
    {
      equals = o instanceof VLVIndexDescriptor;
      if (equals)
      {
        VLVIndexDescriptor index = (VLVIndexDescriptor)o;
        equals = index.getName().equalsIgnoreCase(getName()) &&
          index.getBaseDN().equals(getBaseDN()) &&
          index.getFilter().equals(getFilter()) &&
          index.getScope() == getScope() &&
          index.getSortOrder().equals(getSortOrder());
        if (equals)
        {
          if ((getBackend() != null) && (index.getBackend() != null))
          {
            // Only compare the backend IDs.  In this context is better to
            // do this since the backend object contains some state (like
            // number entries) that can change.
            equals = getBackend().getBackendID().equals(
                index.getBackend().getBackendID());
          }
        }
      }
    }
    return equals;
  }

  /**
   * {@inheritDoc}
   */
  protected void recalculateHashCode()
  {
    StringBuilder sb = new StringBuilder();
    for (VLVSortOrder s : sortOrder)
    {
      sb.append(s.getAttributeName()+s.isAscending()+",");
    }
    if (getBackend() != null)
    {
      sb.append(getBackend().getBackendID());
    }
    hashCode = (getName()+baseDN+scope+filter+sb+maxBlockSize).hashCode();
  }

  /**
   * Returns the maximum block size of the VLV index.
   * @return the maximum block size of the VLV index.
   */
  public int getMaxBlockSize()
  {
    return maxBlockSize;
  }
}