/*
* Created on Oct 12, 2006
* Copyright (C) 2001-6, Anthony Harrison anh23@pitt.edu (jactr.org) This library is free
* software; you can redistribute it and/or modify it under the terms of the GNU
* Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
* This library 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 Lesser General Public License for more
* details. You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.jactr.core.module.declarative.search.map;
public class NullTypeValueMap<I> extends AbstractTypeValueMap<Object,I> implements ITypeValueMap<Object,I>
{
private IValueMap<Object,I> _valueMap;
static final public Object NULL = new Object();
public NullTypeValueMap()
{
_valueMap = new DefaultValueMap<Object,I>();
}
public boolean isValueRelevant(Object value)
{
return value==null || value==NULL;
}
public IValueMap<Object,I> getValueMap()
{
return _valueMap;
}
@Override
public Object asKeyType(Object value)
{
return NULL;
}
}