Spec-Zone .ru
спецификации, руководства, описания, API
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001/* 002 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. 003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 004 * 005 * This code is free software; you can redistribute it and/or modify it 006 * under the terms of the GNU General Public License version 2 only, as 007 * published by the Free Software Foundation. Oracle designates this 008 * particular file as subject to the "Classpath" exception as provided 009 * by Oracle in the LICENSE file that accompanied this code. 010 * 011 * This code is distributed in the hope that it will be useful, but WITHOUT 012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 014 * version 2 for more details (a copy is included in the LICENSE file that 015 * accompanied this code). 016 * 017 * You should have received a copy of the GNU General Public License version 018 * 2 along with this work; if not, write to the Free Software Foundation, 019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 020 * 021 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 022 * or visit www.oracle.com if you need additional information or have any 023 * questions. 024 */ 025 026package javafx.util; 027 028/** 029 * The Callback interface is designed to allow for a common, reusable interface 030 * to exist for defining APIs that requires a call back in certain situations. 031 * <p> 032 * Callback is defined with two generic parameters: the first parameter 033 * specifies the type of the object passed in to the <code>call</code> method, 034 * with the second parameter specifying the return type of the method. 035 * 036 * @param <P> The type of the argument provided to the <code>call</code> method. 037 * @param <R> The type of the return type of the <code>call</code> method. 038 */ 039public interface Callback<P,R> { 040 /** 041 * The <code>call</code> method is called when required, and is given a 042 * single argument of type P, with a requirement that an object of type R 043 * is returned. 044 * 045 * @param param The single argument upon which the returned value should be 046 * determined. 047 * @return An object of type R that may be determined based on the provided 048 * parameter value. 049 */ 050 public R call(P param); 051}