001 /* 002 * Copyright 2002-2004 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 005 * use this file except in compliance with the License. You may obtain a copy of 006 * the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 012 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 013 * License for the specific language governing permissions and limitations under 014 * the License. 015 */ 016 package org.springframework.rules.closure; 017 018 import org.springframework.rules.closure.Closure; 019 020 /** 021 * A function object that tests two arguments and returns a single 022 * <code>boolean</code> result. 023 * <p><p> 024 * A binary closure is a function object that acts on two arguments. For 025 * example, the "Maximum" binary closure returns the maximum of two numbers. 026 * 027 * @author Keith Donald 028 */ 029 public interface BinaryClosure extends Closure { 030 031 /** 032 * Executes this closure with the provided arguments. 033 * 034 * @param argument1 035 * the first argument 036 * @param argument2 037 * the second argument 038 * @return The result of executing the closure 039 */ 040 public Object call(Object argument1, Object argument2); 041 }