| /* |
| * Copyright 2001-2004,2006 The Apache Software Foundation |
| * |
| * 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 org.apache.commons.collections.functors; |
| |
| import java.io.Serializable; |
| import java.util.Collection; |
| |
| import org.apache.commons.collections.Predicate; |
| |
| /** |
| * Predicate implementation that returns true if any of the |
| * predicates return true. |
| * If the array of predicates is empty, then this predicate returns false. |
| * <p> |
| * NOTE: In versions prior to 3.2 an array size of zero or one |
| * threw an exception. |
| * |
| * @since Commons Collections 3.0 |
| * @version $Revision: 1.1 $ $Date: 2009/05/27 22:16:33 $ |
| * |
| * @author Stephen Colebourne |
| * @author Matt Benson |
| */ |
| public final class AnyPredicate implements Predicate, PredicateDecorator, Serializable { |
| |
| /** Serial version UID */ |
| private static final long serialVersionUID = 7429999530934647542L; |
| |
| /** The array of predicates to call */ |
| private final Predicate[] iPredicates; |
| |
| /** |
| * Factory to create the predicate. |
| * <p> |
| * If the array is size zero, the predicate always returns false. |
| * If the array is size one, then that predicate is returned. |
| * |
| * @param predicates the predicates to check, cloned, not null |
| * @return the <code>any</code> predicate |
| * @throws IllegalArgumentException if the predicates array is null |
| * @throws IllegalArgumentException if any predicate in the array is null |
| */ |
| public static Predicate getInstance(Predicate[] predicates) { |
| FunctorUtils.validate(predicates); |
| if (predicates.length == 0) { |
| return FalsePredicate.INSTANCE; |
| } |
| if (predicates.length == 1) { |
| return predicates[0]; |
| } |
| return new AnyPredicate(FunctorUtils.copy(predicates)); |
| } |
| |
| /** |
| * Factory to create the predicate. |
| * <p> |
| * If the collection is size zero, the predicate always returns false. |
| * If the collection is size one, then that predicate is returned. |
| * |
| * @param predicates the predicates to check, cloned, not null |
| * @return the <code>all</code> predicate |
| * @throws IllegalArgumentException if the predicates array is null |
| * @throws IllegalArgumentException if any predicate in the array is null |
| */ |
| public static Predicate getInstance(Collection predicates) { |
| Predicate[] preds = FunctorUtils.validate(predicates); |
| if (preds.length == 0) { |
| return FalsePredicate.INSTANCE; |
| } |
| if (preds.length == 1) { |
| return preds[0]; |
| } |
| return new AnyPredicate(preds); |
| } |
| |
| /** |
| * Constructor that performs no validation. |
| * Use <code>getInstance</code> if you want that. |
| * |
| * @param predicates the predicates to check, not cloned, not null |
| */ |
| public AnyPredicate(Predicate[] predicates) { |
| super(); |
| iPredicates = predicates; |
| } |
| |
| /** |
| * Evaluates the predicate returning true if any predicate returns true. |
| * |
| * @param object the input object |
| * @return true if any decorated predicate return true |
| */ |
| public boolean evaluate(Object object) { |
| for (int i = 0; i < iPredicates.length; i++) { |
| if (iPredicates[i].evaluate(object)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Gets the predicates, do not modify the array. |
| * |
| * @return the predicates |
| * @since Commons Collections 3.1 |
| */ |
| public Predicate[] getPredicates() { |
| return iPredicates; |
| } |
| |
| } |