/* * Copyright (c) 2008, 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.beans.decoder; /** * This utility class provides {@code static} method * to create the object that contains the result of method execution. * * @since 1.7 * * @author Sergey A. Malenkov */final class ValueObjectImpl implements ValueObject {    static final ValueObject NULL = new ValueObjectImpl(null);    static final ValueObject VOID = new ValueObjectImpl();     /**     * Returns the object that describes returning value.     *     * @param value  the result of method execution     * @return the object that describes value     */    static ValueObject create(Object value) {        return (value != null)                ? new ValueObjectImpl(value)                : NULL;    }     private Object value;    private boolean isVoid;     /**     * Creates the object that describes returning void value.     */    private ValueObjectImpl() {        this.isVoid = true;    }     /**     * Creates the object that describes returning non-void value.     *     * @param value  the result of method execution     */    private ValueObjectImpl(Object value) {        this.value = value;    }     /**     * Returns the result of method execution.     *     * @return the result of method execution     */    public Object getValue() {        return this.value;    }     /**     * Returns {@code void} state of this value object.     *     * @return {@code true} if value should be ignored,     *         {@code false} otherwise     */    public boolean isVoid() {        return this.isVoid;    }}