/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.internal.btree;
/**
* Composite key for field indexes, first compares on the actual
* indexed field _value and then on the _parentID (which is a
* reference to the containing object).
*
* @exclude
*/
public class FieldIndexKeyImpl implements FieldIndexKey {
private final Object _value;
private final int _parentID;
public FieldIndexKeyImpl(int parentID, Object value){
_parentID = parentID;
_value = value;
}
public int parentID(){
return _parentID;
}
public Object value(){
return _value;
}
public String toString() {
return "FieldIndexKey(" + _parentID + ", " + safeString(_value) + ")";
}
private String safeString(Object value) {
if (null == value) {
return "null";
}
return value.toString();
}
}