001 /*
002 * Copyright 2005 Stephen J. McConnell.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of 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,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
013 * implied.
014 *
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019 package net.dpml.test.composite;
020
021 import java.awt.Color;
022
023 import net.dpml.test.ColorManager;
024
025 /**
026 * Arbitary component used in the testing of parent to child context management.
027 * The key features tested though this class is the assignment of a color value by
028 * the enclosing component (as opposed to a static directive).
029 *
030 * @author <a href="http://www.dpml.net">Digital Product Meta Library</a>
031 * @version 1.2.0
032 */
033 public class ChildComponent implements ColorManager
034 {
035 //------------------------------------------------------------------
036 // concerns
037 //------------------------------------------------------------------
038
039 /**
040 * The construction criteria.
041 */
042 public interface Context
043 {
044 /**
045 * Return the assigned color.
046 * @return the color value
047 */
048 Color getColor();
049 }
050
051 //------------------------------------------------------------------
052 // state
053 //------------------------------------------------------------------
054
055 /**
056 * The assigned context instance.
057 */
058 private final Context m_context;
059
060 //------------------------------------------------------------------
061 // constructor
062 //------------------------------------------------------------------
063
064 /**
065 * Creation of a new singleton component instance.
066 * @param context a context implementation fullfilling the context criteria
067 */
068 public ChildComponent( final Context context )
069 {
070 m_context = context;
071 }
072
073 //------------------------------------------------------------------
074 // Example
075 //------------------------------------------------------------------
076
077 /**
078 * Return the color value assigned to the component context.
079 * @return the color value
080 */
081 public Color getColor()
082 {
083 return m_context.getColor();
084 }
085 }