/*
* 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.jackrabbit.commons.predicate;
/**
* Interface for object predicates, i.e. functions that evaluate a given
* object to a boolean value.
*/
public interface Predicate {
/**
* Evaluates the predicate for the given object.
*
* @param object some object
* @return predicate result
*/
boolean evaluate(Object object);
/**
* Constant predicate that returns <code>true</code> for all objects.
*/
Predicate TRUE = new Predicate() {
public boolean evaluate(Object object) {
return true;
}
};
/**
* Constant predicate that returns <code>false</code> for all objects.
*/
Predicate FALSE = new Predicate() {
public boolean evaluate(Object object) {
return false;
}
};
}