| /* |
| * 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; |
| } |
| } |