org.apache.jackrabbit.spi.commons.iterator.Predicates Maven / Gradle / Ivy
/*
* 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.spi.commons.iterator;
/**
* Utility class containing pre defined {@link Predicate}s
*/
public final class Predicates {
/**
* A predicate which is always true
*/
public static final Predicate TRUE = new Predicate() {
public boolean evaluate(Object arg) {
return true;
}
};
/**
* A predicate which is always false
*/
public static final Predicate FALSE = new Predicate() {
public boolean evaluate(Object arg) {
return false;
}
};
private Predicates() {
// no instances allowed
}
/**
* A predicate which is always true
* @param
* @return
*/
@SuppressWarnings("unchecked")
public static Predicate TRUE() {
return TRUE;
}
/**
* A predicate which is always false
* @param
* @return
*/
@SuppressWarnings("unchecked")
public static Predicate FALSE() {
return FALSE;
}
}