1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20 package org.apache.chemistry.opencmis.jcr.util; 21 22 /** 23 * Interface for predicates of type <code>T</code>, i.e. functions from <code>T</code> 24 * to <code>boolean</code>. 25 */ 26 public interface Predicate<T> { 27 28 /** 29 * Evaluates the predicate for the given object. 30 * 31 * @param t some object 32 * @return predicate result 33 */ 34 boolean evaluate(T t); 35 36 /** 37 * Constant predicate that returns <code>true</code> for all objects. 38 */ 39 Predicate<?> TRUE = new Predicate<Object>() { 40 public boolean evaluate(Object object) { 41 return true; 42 } 43 }; 44 45 /** 46 * Constant predicate that returns <code>false</code> for all objects. 47 */ 48 Predicate<?> FALSE = new Predicate<Object>() { 49 public boolean evaluate(Object object) { 50 return false; 51 } 52 }; 53 54 }