/*
    *  Licensed to the Apache Software Foundation (ASF) under one
    *  or more contributor license agreements.  See the NOTICE file
    *  distributed with this work for additional information
    *  regarding copyright ownership.  The ASF licenses this file
    *  to you under the Apache License, Version 2.0 (the
    *  "License"); you may not use this file except in compliance
    *  with the License.  You may obtain a copy of the License at
    *  
   *    http://www.apache.org/licenses/LICENSE-2.0
   *  
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License. 
   *  
   */
  package org.apache.directory.api.ldap.model.ldif;
  
  
  import java.io.Externalizable;
  import java.io.IOException;
  import java.io.ObjectInput;
  import java.io.ObjectOutput;
  import java.util.HashMap;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  import org.apache.directory.api.i18n.I18n;
  import org.apache.directory.api.ldap.model.entry.Attribute;
  import org.apache.directory.api.ldap.model.entry.DefaultAttribute;
  import org.apache.directory.api.ldap.model.entry.DefaultEntry;
  import org.apache.directory.api.ldap.model.entry.DefaultModification;
  import org.apache.directory.api.ldap.model.entry.Entry;
  import org.apache.directory.api.ldap.model.entry.Modification;
  import org.apache.directory.api.ldap.model.entry.ModificationOperation;
  import org.apache.directory.api.ldap.model.entry.StringValue;
  import org.apache.directory.api.ldap.model.entry.Value;
  import org.apache.directory.api.ldap.model.exception.LdapException;
  import org.apache.directory.api.ldap.model.exception.LdapInvalidAttributeValueException;
  import org.apache.directory.api.ldap.model.exception.LdapInvalidDnException;
  import org.apache.directory.api.ldap.model.message.Control;
  import org.apache.directory.api.ldap.model.message.ResultCodeEnum;
  import org.apache.directory.api.ldap.model.name.Dn;
  import org.apache.directory.api.ldap.model.name.Rdn;
  import org.apache.directory.api.ldap.model.schema.SchemaManager;
  import org.apache.directory.api.util.Base64;
  import org.apache.directory.api.util.Strings;
  
  
  /**
   * A entry to be populated by an ldif parser.
   * 
   * We will have different kind of entries : 
   * <ul>
   * <li>added entries</li>
   * <li>deleted entries</li>
   * <li>modified entries</li>
   * <li>Rdn modified entries</li>
   * <li>Dn modified entries</li>
   * </ul>
   * 
   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
   */
  public class LdifEntry implements Cloneable, Externalizable
  {
      /** Used in toArray() */
      public static final Modification[] EMPTY_MODS = new Modification[0];
  
      /** the change type */
      private ChangeType changeType;
  
      /** the modification item list */
      private List<Modification> modificationList;
  
      /** The map containing all the modifications */
      private Map<String, Modification> modifications;
  
      /** The new superior */
      private String newSuperior;
  
      /** The new rdn */
      private String newRdn;
  
      /** The delete old rdn flag */
      private boolean deleteOldRdn;
  
      /** the entry */
      private Entry entry;
  
      /** the DN */
      private Dn entryDn;
  
      /** The controls */
      private Map<String, LdifControl> controls;
 
     /** The lengthBeforeParsing of the entry at the time of parsing. This includes
      *  the lengthBeforeParsing of the comments present in entry at the time of parsing
      *  so this lengthBeforeParsing may not always match with the lengthBeforeParsing of the entry
      *  data present in memory.
      */
     private int lengthBeforeParsing = 0;
 
     /** the position of the entry in the file or given input string*/
     private long offset = 0;
 
 
     /**
      * Creates a new LdifEntry object.
      */
     public LdifEntry()
     {
         changeType = ChangeType.None; // Default LDIF content
         modificationList = new LinkedList<Modification>();
         modifications = new HashMap<String, Modification>();
         entry = new DefaultEntry( ( Dn ) null );
         entryDn = null;
         controls = null;
     }
 
 
     /**
      * Creates a new schema aware LdifEntry object.
      */
     public LdifEntry( SchemaManager schemaManager )
     {
         changeType = ChangeType.None; // Default LDIF content
         modificationList = new LinkedList<Modification>();
         modifications = new HashMap<String, Modification>();
         entry = new DefaultEntry( schemaManager, ( Dn ) null );
         entryDn = null;
         controls = null;
     }
 
 
     /**
      * Creates a new LdifEntry object, storing an Entry
      */
     public LdifEntry( Entry entry )
     {
         changeType = ChangeType.None; // Default LDIF content
         modificationList = new LinkedList<Modification>();
         modifications = new HashMap<String, Modification>();
         this.entry = entry;
         entryDn = entry.getDn();
         controls = null;
     }
 
 
     /**
      * Creates a LdifEntry using a list of strings representing the Ldif element
      * 
      * @param dn The LdifEntry DN
      * @param avas The Ldif to convert to an LdifEntry
      * @throws LdapInvalidAttributeValueException If either the AttributeType or the associated value
      * is incorrect
      * @throws LdapLdifException If we get any other exception
      */
     public LdifEntry( Dn dn, Object... avas ) throws LdapInvalidAttributeValueException, LdapLdifException
     {
         // First, convert the arguments to a full LDIF
         StringBuilder sb = new StringBuilder();
         int pos = 0;
         boolean valueExpected = false;
         String dnStr = null;
 
         if ( dn == null )
         {
             dnStr = "";
         }
         else
         {
             dnStr = dn.getName();
         }
 
         if ( LdifUtils.isLDIFSafe( dnStr ) )
         {
             sb.append( "dn: " ).append( dnStr ).append( '\n' );
         }
         else
         {
             sb.append( "dn:: " ).append( Base64.encode( Strings.getBytesUtf8( dnStr ) ) ).append( '\n' );
         }
 
         for ( Object ava : avas )
         {
             if ( !valueExpected )
             {
                 if ( !( ava instanceof String ) )
                 {
                     throw new LdapInvalidAttributeValueException( ResultCodeEnum.INVALID_ATTRIBUTE_SYNTAX, I18n.err(
                         I18n.ERR_12085, ( pos + 1 ) ) );
                 }
 
                 String attribute = ( String ) ava;
                 sb.append( attribute );
 
                 if ( attribute.indexOf( ':' ) != -1 )
                 {
                     sb.append( '\n' );
                 }
                 else
                 {
                     valueExpected = true;
                 }
             }
             else
             {
                 if ( ava instanceof String )
                 {
                     sb.append( ": " ).append( ( String ) ava ).append( '\n' );
                 }
                 else if ( ava instanceof byte[] )
                 {
                     sb.append( ":: " );
                     sb.append( new String( Base64.encode( ( byte[] ) ava ) ) );
                     sb.append( '\n' );
                 }
                 else
                 {
                     throw new LdapInvalidAttributeValueException( ResultCodeEnum.INVALID_ATTRIBUTE_SYNTAX, I18n.err(
                         I18n.ERR_12086, ( pos + 1 ) ) );
                 }
 
                 valueExpected = false;
             }
         }
 
         if ( valueExpected )
         {
             throw new LdapInvalidAttributeValueException( ResultCodeEnum.INVALID_ATTRIBUTE_SYNTAX, I18n
                 .err( I18n.ERR_12087 ) );
         }
 
         // Now, parse the Ldif and convert it to a LdifEntry
         LdifReader reader = new LdifReader();
         List<LdifEntry> ldifEntries = reader.parseLdif( sb.toString() );
 
         try
         {
             reader.close();
         }
         catch ( IOException e )
         {
             e.printStackTrace();
         }
 
         if ( ( ldifEntries != null ) && ( ldifEntries.size() == 1 ) )
         {
             LdifEntry ldifEntry = ldifEntries.get( 0 );
 
             changeType = ldifEntry.getChangeType();
             controls = ldifEntry.getControls();
             entryDn = ldifEntry.getDn();
 
             switch ( ldifEntry.getChangeType() )
             {
                 case Add:
                     // Fallback
                 case None:
                     entry = ldifEntry.getEntry();
                     break;
 
                 case Delete:
                     break;
 
                 case ModDn:
                 case ModRdn:
                     newRdn = ldifEntry.getNewRdn();
                     newSuperior = ldifEntry.getNewSuperior();
                     deleteOldRdn = ldifEntry.isDeleteOldRdn();
                     break;
 
                 case Modify:
                     modificationList = ldifEntry.getModifications();
                     modifications = new HashMap<String, Modification>();
 
                     for ( Modification modification : modificationList )
                     {
                         modifications.put( modification.getAttribute().getId(), modification );
                     }
 
                     break;
             }
         }
     }
 
 
     /**
      * Creates a LdifEntry using a list of strings representing the Ldif element
      * 
      * @param dn The LdifEntry DN
      * @param avas The Ldif attributes and values to convert to an LdifEntry
      * @throws LdapInvalidDnException If the Dn is invalid
      * @throws LdapInvalidAttributeValueException If either the AttributeType or the associated value
      * is incorrect
      * @throws LdapLdifException If we get any other exception
      */
     public LdifEntry( String dn, Object... strings )
         throws LdapInvalidAttributeValueException, LdapLdifException, LdapInvalidDnException
     {
         this( new Dn( dn ), strings );
     }
 
 
     /**
      * Set the Distinguished Name
      * 
      * @param dn The Distinguished Name
      */
     public void setDn( Dn dn )
     {
         entryDn = dn;
         entry.setDn( dn );
     }
 
 
     /**
      * Set the Distinguished Name
      * 
      * @param dn The Distinguished Name
      * @throws LdapInvalidDnException If the Dn is invalid
      */
     public void setDn( String dn ) throws LdapInvalidDnException
     {
         entryDn = new Dn( dn );
         entry.setDn( entryDn );
     }
 
 
     /**
      * Set the modification type
      * 
      * @param changeType The change type
      * 
      */
     public void setChangeType( ChangeType changeType )
     {
         this.changeType = changeType;
     }
 
 
     /**
      * Set the change type
      * 
      * @param changeType The change type
      */
     public void setChangeType( String changeType )
     {
         if ( "add".equals( changeType ) )
         {
             this.changeType = ChangeType.Add;
         }
         else if ( "modify".equals( changeType ) )
         {
             this.changeType = ChangeType.Modify;
         }
         else if ( "moddn".equals( changeType ) )
         {
             this.changeType = ChangeType.ModDn;
         }
         else if ( "modrdn".equals( changeType ) )
         {
             this.changeType = ChangeType.ModRdn;
         }
         else if ( "delete".equals( changeType ) )
         {
             this.changeType = ChangeType.Delete;
         }
     }
 
 
     /**
      * Add a modification item (used by modify operations)
      * 
      * @param modification The modification to be added
      */
     public void addModification( Modification modification )
     {
         if ( changeType == ChangeType.Modify )
         {
             modificationList.add( modification );
             modifications.put( modification.getAttribute().getId(), modification );
         }
     }
 
 
     /**
      * Add a modification item (used by modify operations)
      * 
      * @param modOp The operation. One of : 
      * <ul>
      * <li>ModificationOperation.ADD_ATTRIBUTE</li>
      * <li>ModificationOperation.REMOVE_ATTRIBUTE</li>
      * <li>ModificationOperation.REPLACE_ATTRIBUTE</li>
      * </ul>
      * 
      * @param attr The attribute to be added
      */
     public void addModification( ModificationOperation modOp, Attribute attr )
     {
         if ( changeType == ChangeType.Modify )
         {
             Modification item = new DefaultModification( modOp, attr );
             modificationList.add( item );
             modifications.put( attr.getId(), item );
         }
     }
 
 
     /**
      * Add a modification
      * 
      * @param modOp The modification operation value. One of : 
      * <ul>
      * <li>ModificationOperation.ADD_ATTRIBUTE</li>
      * <li>ModificationOperation.REMOVE_ATTRIBUTE</li>
      * <li>ModificationOperation.REPLACE_ATTRIBUTE</li>
      * </ul>
      * 
      * @param id The attribute's ID
      * @param value The attribute's value
      */
     public void addModification( ModificationOperation modOp, String id, Object value )
     {
         if ( changeType == ChangeType.Modify )
         {
             Attribute attr;
 
             if ( value == null )
             {
                 value = new StringValue( ( String ) null );
                 attr = new DefaultAttribute( id, ( Value<?> ) value );
             }
             else
             {
                 attr = ( Attribute ) value;
             }
 
             Modification item = new DefaultModification( modOp, attr );
             modificationList.add( item );
             modifications.put( id, item );
         }
     }
 
 
     /**
      * Add an attribute to the entry
      * 
      * @param attr The attribute to be added
      * @throws org.apache.directory.api.ldap.model.exception.LdapException if something went wrong
      */
     public void addAttribute( Attribute attr ) throws LdapException
     {
         entry.put( attr );
     }
 
 
     /**
      * Add an attribute to the entry
      * 
      * @param id The attribute ID
      * 
      * @param values The attribute values
      * @throws LdapException if something went wrong
      */
     public void addAttribute( String id, Object... values ) throws LdapException
     {
         Attribute attribute = entry.get( id );
         Boolean isHR = null;
 
         if ( attribute != null )
         {
             isHR = attribute.isHumanReadable();
         }
 
         if ( values != null )
         {
             for ( Object value : values )
             {
                 if ( value instanceof String )
                 {
                     if ( isHR != null )
                     {
                         if ( isHR )
                         {
                             entry.add( id, ( String ) value );
                         }
                         else
                         {
                             entry.add( id, Strings.getBytesUtf8( ( String ) value ) );
                         }
                     }
                     else
                     {
                         entry.add( id, ( String ) value );
                     }
                 }
                 else
                 {
                     if ( isHR != null )
                     {
                         if ( isHR )
                         {
                             entry.add( id, Strings.utf8ToString( ( byte[] ) value ) );
                         }
                         else
                         {
                             entry.add( id, ( byte[] ) value );
                         }
                     }
                     else
                     {
                         entry.add( id, ( byte[] ) value );
                     }
                 }
             }
         }
         else
         {
             entry.add( id, ( Value<?> ) null );
         }
     }
 
 
     /**
      * Remove a list of Attributes from the LdifEntry
      *
      * @param ids The Attributes to remove
      * @return The list of removed EntryAttributes
      */
     public void removeAttribute( String... ids )
     {
         if ( entry.containsAttribute( ids ) )
         {
             entry.removeAttributes( ids );
         }
     }
 
 
     /**
      * Add an attribute value to an existing attribute
      * 
      * @param id The attribute ID
      * 
      * @param value The attribute value
      * @throws org.apache.directory.api.ldap.model.exception.LdapException if something went wrong
      */
     public void putAttribute( String id, Object value ) throws LdapException
     {
         if ( value instanceof String )
         {
             entry.add( id, ( String ) value );
         }
         else
         {
             entry.add( id, ( byte[] ) value );
         }
     }
 
 
     /**
      * Get the change type
      * 
      * @return The change type. One of : 
      * <ul>
      * <li>ADD</li>
      * <li>MODIFY</li>
      * <li>MODDN</li>
      * <li>MODRDN</li>
      * <li>DELETE</li>
      * <li>NONE</li>
      * </ul>
      */
     public ChangeType getChangeType()
     {
         return changeType;
     }
 
 
     /**
      * @return The list of modification items
      */
     public List<Modification> getModifications()
     {
         return modificationList;
     }
 
 
     /**
      * Gets the modification items as an array.
      *
      * @return modification items as an array.
      */
     public Modification[] getModificationArray()
     {
         return modificationList.toArray( EMPTY_MODS );
     }
 
 
     /**
      * @return The entry Distinguished name
      */
     public Dn getDn()
     {
         return entryDn;
     }
 
 
     /**
      * @return The number of entry modifications
      */
     public int size()
     {
         return modificationList.size();
     }
 
 
     /**
      * Returns a attribute given it's id
      * 
      * @param attributeId The attribute Id
      * @return The attribute if it exists
      */
     public Attribute get( String attributeId )
     {
         if ( "dn".equalsIgnoreCase( attributeId ) )
         {
             return new DefaultAttribute( "dn", entry.getDn().getName() );
         }
 
         return entry.get( attributeId );
     }
 
 
     /**
      * Get the entry's entry
      * 
      * @return the stored Entry
      */
     public Entry getEntry()
     {
         if ( isEntry() )
         {
             return entry;
         }
         else
         {
             return null;
         }
     }
 
 
     /**
      * @return True, if the old Rdn should be deleted.
      */
     public boolean isDeleteOldRdn()
     {
         return deleteOldRdn;
     }
 
 
     /**
      * Set the flage deleteOldRdn
      * 
      * @param deleteOldRdn True if the old Rdn should be deleted
      */
     public void setDeleteOldRdn( boolean deleteOldRdn )
     {
         this.deleteOldRdn = deleteOldRdn;
     }
 
 
     /**
      * @return The new Rdn
      */
     public String getNewRdn()
     {
         return newRdn;
     }
 
 
     /**
      * Set the new Rdn
      * 
      * @param newRdn The new Rdn
      */
     public void setNewRdn( String newRdn )
     {
         this.newRdn = newRdn;
     }
 
 
     /**
      * @return The new superior
      */
     public String getNewSuperior()
     {
         return newSuperior;
     }
 
 
     /**
      * Set the new superior
      * 
      * @param newSuperior The new Superior
      */
     public void setNewSuperior( String newSuperior )
     {
         this.newSuperior = newSuperior;
     }
 
 
     /**
      * @return True if this is a content ldif
      */
     public boolean isLdifContent()
     {
         return changeType == ChangeType.None;
     }
 
 
     /**
      * @return True if there is this is a change ldif
      */
     public boolean isLdifChange()
     {
         return changeType != ChangeType.None;
     }
 
 
     /**
      * @return True if the entry is an ADD entry
      */
     public boolean isChangeAdd()
     {
         return changeType == ChangeType.Add;
     }
 
 
     /**
      * @return True if the entry is a DELETE entry
      */
     public boolean isChangeDelete()
     {
         return changeType == ChangeType.Delete;
     }
 
 
     /**
      * @return True if the entry is a MODDN entry
      */
     public boolean isChangeModDn()
     {
         return changeType == ChangeType.ModDn;
     }
 
 
     /**
      * @return True if the entry is a MODRDN entry
      */
     public boolean isChangeModRdn()
     {
         return changeType == ChangeType.ModRdn;
     }
 
 
     /**
      * @return True if the entry is a MODIFY entry
      */
     public boolean isChangeModify()
     {
         return changeType == ChangeType.Modify;
     }
 
 
     /**
      * Tells if the current entry is a added one
      *
      * @return <code>true</code> if the entry is added
      */
     public boolean isEntry()
     {
         return ( changeType == ChangeType.None ) || ( changeType == ChangeType.Add );
     }
 
 
     /**
      * @return true if the entry has some controls
      */
     public boolean hasControls()
     {
         return controls != null;
     }
 
 
     /**
      * @return The set of controls for this entry
      */
     public Map<String, LdifControl> getControls()
     {
         return controls;
     }
 
 
     /**
      * @param oid The control's OID
      * @return The associated control, if any
      */
     public LdifControl getControl( String oid )
     {
         if ( controls != null )
         {
             return controls.get( oid );
         }
 
         return null;
     }
 
 
     /**
      * Add a control to the entry
      * 
      * @param controls The added controls
      */
     public void addControl( Control... controls )
     {
         if ( controls == null )
         {
             throw new IllegalArgumentException( "The added control must not be null" );
         }
 
         for ( Control control : controls )
         {
             if ( changeType == ChangeType.None )
             {
                 changeType = ChangeType.Add;
             }
 
             if ( this.controls == null )
             {
                 this.controls = new ConcurrentHashMap<String, LdifControl>();
             }
 
             if ( control instanceof LdifControl )
             {
                 this.controls.put( control.getOid(), ( LdifControl ) control );
             }
             else
             {
                 LdifControl ldifControl = new LdifControl( control.getOid() );
                 ldifControl.setCritical( control.isCritical() );
                 this.controls.put( control.getOid(), new LdifControl( control.getOid() ) );
             }
         }
     }
 
 
     /**
      * Clone method
      * @return a clone of the current instance
      * @exception CloneNotSupportedException If there is some problem while cloning the instance
      */
     public LdifEntry clone() throws CloneNotSupportedException
     {
         LdifEntry clone = ( LdifEntry ) super.clone();
 
         if ( modificationList != null )
         {
             for ( Modification modif : modificationList )
             {
                 Modification modifClone = new DefaultModification( modif.getOperation(),
                     modif.getAttribute().clone() );
                 clone.modificationList.add( modifClone );
             }
         }
 
         if ( modifications != null )
         {
             for ( String key : modifications.keySet() )
             {
                 Modification modif = modifications.get( key );
                 Modification modifClone = new DefaultModification( modif.getOperation(),
                     modif.getAttribute().clone() );
                 clone.modifications.put( key, modifClone );
             }
 
         }
 
         if ( entry != null )
         {
             clone.entry = entry.clone();
         }
 
         return clone;
     }
 
 
     /** 
      *  Returns the lengthBeforeParsing of the entry at the time of parsing. This includes
      *  the lengthBeforeParsing of the comments present in entry at the time of parsing
      *  so this lengthBeforeParsing may not always match with the lengthBeforeParsing of the entry
      *  data present in memory.
      */
     public int getLengthBeforeParsing()
     {
         return lengthBeforeParsing;
     }
 
 
     /**
      * @param lengthBeforeParsing the lengthBeforeParsing to set
      */
     /**No qualifier*/
     void setLengthBeforeParsing( int length )
     {
         this.lengthBeforeParsing = length;
     }
 
 
     /**
      * @return the offset
      */
     public long getOffset()
     {
         return offset;
     }
 
 
     /**
      * @param offset the offset to set
      */
     /**No qualifier*/
     void setOffset( long offset )
     {
         this.offset = offset;
     }
 
 
     /**
      * @return a String representing the Entry, as a LDIF 
      */
     public String toString()
     {
         try
         {
             return LdifUtils.convertToLdif( this );
         }
         catch ( LdapException ne )
         {
             return "";
         }
     }
 
 
     /**
      * @see Object#hashCode()
      * 
      * @return the instance's hash code
      */
     public int hashCode()
     {
         int result = 37;
 
         if ( entry != null && entry.getDn() != null )
         {
             result = result * 17 + entry.getDn().hashCode();
         }
 
         if ( changeType != null )
         {
             result = result * 17 + changeType.hashCode();
 
             // Check each different cases
             switch ( changeType )
             {
                 case None:
                     // Fall through
                 case Add:
                     // Checks the attributes
                     if ( entry != null )
                     {
                         result = result * 17 + entry.hashCode();
                     }
 
                     break;
 
                 case Delete:
                     // Nothing to compute
                     break;
 
                 case Modify:
                     if ( modificationList != null )
                     {
                         result = result * 17 + modificationList.hashCode();
 
                         for ( Modification modification : modificationList )
                         {
                             result = result * 17 + modification.hashCode();
                         }
                     }
 
                     break;
 
                 case ModDn:
                 case ModRdn:
                     result = result * 17;
 
                     if ( deleteOldRdn )
                     {
                         result++;
                     }
                     else
                     {
                         result--;
                     }
 
                     if ( newRdn != null )
                     {
                         result = result * 17 + newRdn.hashCode();
                     }
 
                     if ( newSuperior != null )
                     {
                         result = result * 17 + newSuperior.hashCode();
                     }
 
                     break;
 
                 default:
                     break; // do nothing
             }
         }
 
         if ( controls != null )
         {
             for ( String control : controls.keySet() )
             {
                 result = result * 17 + control.hashCode();
             }
         }
 
         return result;
     }
 
 
     /**
      * {@inheritDoc}
      */
     public boolean equals( Object o )
     {
         // Basic equals checks
         if ( this == o )
         {
             return true;
         }
 
         if ( o == null )
         {
             return false;
         }
 
         if ( !( o instanceof LdifEntry ) )
         {
             return false;
         }
 
         LdifEntry otherEntry = ( LdifEntry ) o;
 
         // Check the Dn
         Dn thisDn = entryDn;
         Dn dnEntry = otherEntry.getDn();
 
         if ( !thisDn.equals( dnEntry ) )
         {
             return false;
         }
 
         // Check the changeType
         if ( changeType != otherEntry.changeType )
         {
             return false;
         }
 
         // Check each different cases
         switch ( changeType )
         {
             case None:
                 // Fall through
             case Add:
                 // Checks the attributes
                 if ( entry.size() != otherEntry.entry.size() )
                 {
                     return false;
                 }
 
                 if ( !entry.equals( otherEntry.entry ) )
                 {
                     return false;
                 }
 
                 break;
 
             case Delete:
                 // Nothing to do, if the DNs are equals
                 break;
 
             case Modify:
                 // Check the modificationItems list
 
                 // First, deal with special cases
                 if ( modificationList == null )
                 {
                     if ( otherEntry.modificationList != null )
                     {
                         return false;
                     }
                     else
                     {
                         break;
                     }
                 }
 
                 if ( otherEntry.modificationList == null )
                 {
                     return false;
                 }
 
                 if ( modificationList.size() != otherEntry.modificationList.size() )
                 {
                     return false;
                 }
 
                 // Now, compares the contents
                 int i = 0;
 
                 for ( Modification modification : modificationList )
                 {
                     if ( !modification.equals( otherEntry.modificationList.get( i ) ) )
                     {
                         return false;
                     }
 
                     i++;
                 }
 
                 break;
 
             case ModDn:
             case ModRdn:
                 // Check the deleteOldRdn flag
                 if ( deleteOldRdn != otherEntry.deleteOldRdn )
                 {
                     return false;
                 }
 
                 // Check the newRdn value
                 try
                 {
                     Rdn thisNewRdn = new Rdn( newRdn );
                     Rdn entryNewRdn = new Rdn( otherEntry.newRdn );
 
                     if ( !thisNewRdn.equals( entryNewRdn ) )
                     {
                         return false;
                     }
                 }
                 catch ( LdapInvalidDnException ine )
                 {
                     return false;
                 }
 
                 // Check the newSuperior value
                 try
                 {
                     Dn thisNewSuperior = new Dn( newSuperior );
                     Dn entryNewSuperior = new Dn( otherEntry.newSuperior );
 
                     if ( !thisNewSuperior.equals( entryNewSuperior ) )
                     {
                         return false;
                     }
                 }
                 catch ( LdapInvalidDnException ine )
                 {
                     return false;
                 }
 
                 break;
 
             default:
                 break; // do nothing
         }
 
         if ( controls != null )
         {
             Map<String, LdifControl> otherControls = otherEntry.controls;
 
             if ( otherControls == null )
             {
                 return false;
             }
 
             if ( controls.size() != otherControls.size() )
             {
                 return false;
             }
 
             for ( String controlOid : controls.keySet() )
             {
                 if ( !otherControls.containsKey( controlOid ) )
                 {
                     return false;
                 }
 
                 Control thisControl = controls.get( controlOid );
                 Control otherControl = otherControls.get( controlOid );
 
                 if ( thisControl == null )
                 {
                     if ( otherControl != null )
                     {
                         return false;
                     }
                 }
                 else
                 {
                     if ( !thisControl.equals( otherControl ) )
                     {
                         return false;
                     }
                 }
             }
 
             return true;
         }
         else
         {
             return otherEntry.controls == null;
         }
     }
 
 
     /**
      * @see Externalizable#readExternal(ObjectInput)
      * 
      * @param in The stream from which the LdifEntry is read
      * @throws IOException If the stream can't be read
      * @throws ClassNotFoundException If the LdifEntry can't be created 
      */
     public void readExternal( ObjectInput in ) throws IOException, ClassNotFoundException
     {
         // Read the changeType
         int type = in.readInt();
         changeType = ChangeType.getChangeType( type );
 
         // Read the modification
         switch ( changeType )
         {
             case Add:
             case None:
                 // Read the entry
                 entry.readExternal( in );
                 entryDn = entry.getDn();
 
                 break;
 
             case Delete:
                 // Read the Dn
                 entryDn = new Dn();
                 entryDn.readExternal( in );
 
                 break;
 
             case ModDn:
                 // Fallback
             case ModRdn:
                 // Read the Dn
                 entryDn = new Dn();
                 entryDn.readExternal( in );
 
                 deleteOldRdn = in.readBoolean();
 
                 if ( in.readBoolean() )
                 {
                     newRdn = in.readUTF();
                 }
 
                 if ( in.readBoolean() )
                 {
                     newSuperior = in.readUTF();
                 }
 
                 break;
 
             case Modify:
                 // Read the Dn
                 entryDn = new Dn();
                 entryDn.readExternal( in );
 
                 // Read the modifications
                 int nbModifs = in.readInt();
 
                 for ( int i = 0; i < nbModifs; i++ )
                 {
                     Modification modification = new DefaultModification();
                     modification.readExternal( in );
 
                     addModification( modification );
                 }
 
                 break;
         }
 
         int nbControls = in.readInt();
 
         // We have at least a control
         if ( nbControls > 0 )
         {
             controls = new ConcurrentHashMap<String, LdifControl>( nbControls );
 
             for ( int i = 0; i < nbControls; i++ )
             {
                 LdifControl control = new LdifControl();
 
                 control.readExternal( in );
 
                 controls.put( control.getOid(), control );
             }
         }
     }
 
 
     /**
      * @see Externalizable#readExternal(ObjectInput)
      * @param out The stream in which the ChangeLogEvent will be serialized.
      * @throws IOException If the serialization fail
      */
     public void writeExternal( ObjectOutput out ) throws IOException
     {
         // Write the changeType
         out.writeInt( changeType.getChangeType() );
 
         // Write the data
         switch ( changeType )
         {
             case Add:
             case None:
                 entry.writeExternal( out );
                 break;
 
             // Fallback
             case Delete:
                 // we write the Dn
                 entryDn.writeExternal( out );
                 break;
 
             case ModDn:
                 // Fallback
             case ModRdn:
                 // Write the Dn
                 entryDn.writeExternal( out );
 
                 out.writeBoolean( deleteOldRdn );
 
                 if ( newRdn == null )
                 {
                     out.writeBoolean( false );
                 }
                 else
                 {
                     out.writeBoolean( true );
                     out.writeUTF( newRdn );
                 }
 
                 if ( newSuperior != null )
                 {
                     out.writeBoolean( true );
                     out.writeUTF( newSuperior );
                 }
                 else
                 {
                     out.writeBoolean( false );
                 }
                 break;
 
             case Modify:
                 // Write the Dn
                 entryDn.writeExternal( out );
 
                 // Write the modifications
                 out.writeInt( modificationList.size() );
 
                 for ( Modification modification : modificationList )
                 {
                     modification.writeExternal( out );
                 }
 
                 break;
         }
 
         // The controls
         if ( controls != null )
         {
             // Write the control
             out.writeInt( controls.size() );
 
             for ( LdifControl control : controls.values() )
             {
                 control.writeExternal( out );
             }
         }
         else
         {
             // No control, write -1
             out.writeInt( -1 );
         }
 
         // and flush the result
         out.flush();
     }
 }