| /* |
| * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.corba.se.impl.orbutil.closure ; |
| |
| import com.sun.corba.se.spi.orbutil.closure.Closure ; |
| |
| public class Future implements Closure { |
| private boolean evaluated ; |
| private Closure closure ; |
| private Object value ; |
| |
| public Future( Closure value ) |
| { |
| this.evaluated = false ; |
| this.closure = (Closure)value ; |
| this.value = null ; |
| } |
| |
| public synchronized Object evaluate() |
| { |
| if (!evaluated) { |
| evaluated = true ; |
| value = closure.evaluate() ; |
| } |
| |
| return value ; |
| } |
| } |