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.functor; 18 19 /** 20 * A functor that takes one argument and returns a <code>boolean</code> value. 21 * <p> 22 * Implementors are encouraged but not required to make their functors 23 * {@link java.io.Serializable Serializable}. 24 * </p> 25 * 26 * @param <A> the argument type. 27 * @since 1.0 28 * @version $Revision: 1156740 $ $Date: 2011-08-11 21:02:40 +0200 (Thu, 11 Aug 2011) $ 29 * @author Rodney Waldhoff 30 */ 31 public interface UnaryPredicate<A> extends UnaryFunctor<A> { 32 /** 33 * Evaluate this predicate. 34 * 35 * @param obj the A object to test 36 * @return the result of this test 37 */ 38 boolean test(A obj); 39 }