1 /*
2 * Copyright 2004-2008 the Seasar Foundation and the Others.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13 * either express or implied. See the License for the specific language
14 * governing permissions and limitations under the License.
15 */
16 package org.seasar.uruma.component.base;
17
18 import java.util.ArrayList;
19 import java.util.List;
20
21 import org.seasar.uruma.component.UIComponent;
22 import org.seasar.uruma.component.UIComponentContainer;
23 import org.seasar.uruma.component.UIElement;
24 import org.seasar.uruma.context.PartContext;
25 import org.seasar.uruma.context.WidgetHandle;
26
27 /**
28 * {@link UIComponentContainer} の子要素を表す基底クラスです。<br />
29 *
30 * @author bskuroneko
31 */
32 public abstract class AbstractUIContainerItemComponent extends
33 AbstractItemComponent implements UIComponentContainer {
34
35 private List<UIElement> children = new ArrayList<UIElement>();
36
37 /*
38 * @see org.seasar.uruma.component.UIElementContainer#addChild(org.seasar.uruma.component.UIElement)
39 */
40 public void addChild(final UIElement child) {
41 children.add(child);
42 if (child instanceof UIComponent) {
43 ((UIComponent) child).setParent(getParent());
44 }
45 }
46
47 /*
48 * @see org.seasar.uruma.component.UIElementContainer#getChildren()
49 */
50 public List<UIElement> getChildren() {
51 return children;
52 }
53
54 /**
55 * 子コンポーネントを取得します。<br />
56 * 子コンポーネントが複数存在する場合、最初の一個を返します。
57 *
58 * @return 子コンポーネント。存在しない場合は <code>null</code>。
59 */
60 public UIElement getChild() {
61 if (children.size() > 0) {
62 return children.get(0);
63 } else {
64 return null;
65 }
66 }
67
68 /*
69 * @see org.seasar.uruma.component.jface.AbstractUIComponent#doRender(org.seasar.uruma.context.WidgetHandle,
70 * org.seasar.uruma.context.PartContext)
71 */
72 @Override
73 protected void doRender(final WidgetHandle parent, final PartContext context) {
74 UIElement content = getChild();
75 if ((content != null) && (content instanceof UIComponent)) {
76 WidgetHandle parentHandle = context.getWidgetHandle(getParent()
77 .getId());
78 ((UIComponent) content).render(parentHandle, context);
79 }
80 }
81 }