1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.collections4.functors; 18 19 import java.io.Serializable; 20 21 import org.apache.commons.collections4.Predicate; 22 23 /** 24 * Predicate implementation that returns true if both the predicates return true. 25 * 26 * @since 3.0 27 */ 28 public final class AndPredicate<T> implements PredicateDecorator<T>, Serializable { 29 30 /** Serial version UID */ 31 private static final long serialVersionUID = 4189014213763186912L; 32 33 /** The array of predicates to call */ 34 private final Predicate<? super T> iPredicate1; 35 /** The array of predicates to call */ 36 private final Predicate<? super T> iPredicate2; 37 38 /** 39 * Factory to create the predicate. 40 * 41 * @param <T> the type that the predicate queries 42 * @param predicate1 the first predicate to check, not null 43 * @param predicate2 the second predicate to check, not null 44 * @return the <code>and</code> predicate 45 * @throws NullPointerException if either predicate is null 46 */ 47 public static <T> Predicate<T> andPredicate(final Predicate<? super T> predicate1, 48 final Predicate<? super T> predicate2) { 49 if (predicate1 == null || predicate2 == null) { 50 throw new NullPointerException("Predicate must not be null"); 51 } 52 return new AndPredicate<>(predicate1, predicate2); 53 } 54 55 /** 56 * Constructor that performs no validation. 57 * Use <code>andPredicate</code> if you want that. 58 * 59 * @param predicate1 the first predicate to check, not null 60 * @param predicate2 the second predicate to check, not null 61 */ 62 public AndPredicate(final Predicate<? super T> predicate1, final Predicate<? super T> predicate2) { 63 super(); 64 iPredicate1 = predicate1; 65 iPredicate2 = predicate2; 66 } 67 68 /** 69 * Evaluates the predicate returning true if both predicates return true. 70 * 71 * @param object the input object 72 * @return true if both decorated predicates return true 73 */ 74 @Override 75 public boolean evaluate(final T object) { 76 return iPredicate1.evaluate(object) && iPredicate2.evaluate(object); 77 } 78 79 /** 80 * Gets the two predicates being decorated as an array. 81 * 82 * @return the predicates 83 * @since 3.1 84 */ 85 @Override 86 @SuppressWarnings("unchecked") 87 public Predicate<? super T>[] getPredicates() { 88 return new Predicate[] {iPredicate1, iPredicate2}; 89 } 90 91 }