/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed 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 net.ontopia.topicmaps.query.spi;
import net.ontopia.utils.ObjectUtils;
import net.ontopia.topicmaps.query.core.InvalidQueryException;
/**
* EXPERIMENTAL: Sample filter implementation that returns true if all
* arguments are equal.<p>
*
* @since 4.0
*/
public class EqualsFilter extends FilterPredicate {
public boolean filter(Object[] objects) throws InvalidQueryException {
// return true if all objects are equal.
if (objects.length > 1) {
for (int i=1; i < objects.length; i++) {
if (ObjectUtils.different(objects[i-1], objects[i]))
return false;
}
}
return true;
}
}