View Javadoc

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;
17  
18  import org.seasar.framework.util.StringUtil;
19  import org.seasar.uruma.binding.enables.EnablesDependingDef;
20  import org.seasar.uruma.binding.enables.EnablesForType;
21  import org.seasar.uruma.context.WidgetHandle;
22  import org.seasar.uruma.context.WindowContext;
23  import org.seasar.uruma.core.UrumaMessageCodes;
24  import org.seasar.uruma.exception.NotFoundException;
25  
26  /**
27   * コンポーネントツリーを走査して、 {@link EnablesDependable} の登録を行うための {@link UIElementVisitor}
28   * です。<br />
29   * 
30   * @author y-komori
31   */
32  public class EnablesDependableVisitor implements UIElementVisitor,
33          UrumaMessageCodes {
34      private WindowContext context;
35  
36      /**
37       * {@link EnablesDependableVisitor} を構築します。<br />
38       * 
39       * @param context
40       */
41      public EnablesDependableVisitor(final WindowContext context) {
42          this.context = context;
43      }
44  
45      /*
46       * @see org.seasar.uruma.component.UIElementVisitor#visit(org.seasar.uruma.component.UIElement)
47       */
48      public void visit(final UIElement element) {
49          if ((element instanceof UIComponent)
50                  && (element instanceof EnablesDependable)) {
51              EnablesDependable dependable = (EnablesDependable) element;
52              String id = ((UIComponent) element).getId();
53  
54              if (id != null) {
55  
56                  String enablesDependingId = dependable.getEnablesDependingId();
57                  String enablesForType = dependable.getEnablesFor();
58  
59                  if (!StringUtil.isEmpty(enablesDependingId)) {
60                      EnablesForType type = EnablesForType.SELECTION;
61                      if (!StringUtil.isEmpty(enablesForType)) {
62                          type = EnablesForType.valueOf(enablesForType);
63                      }
64  
65                      WidgetHandle handle = context.getWidgetHandle(id);
66                      if (handle != null) {
67                          EnablesDependingDef def = new EnablesDependingDef(
68                                  handle, enablesDependingId, type);
69                          context.addEnablesDependingDef(def);
70                      } else {
71                          throw new NotFoundException(UICOMPONENT_NOT_FOUND, id);
72                      }
73                  }
74              }
75          }
76      }
77  
78      /*
79       * @see org.seasar.uruma.component.UIElementVisitor#visit(org.seasar.uruma.component.UIElementContainer)
80       */
81      public void visit(final UIElementContainer container) {
82          for (UIElement element : container.getChildren()) {
83              element.accept(this);
84          }
85      }
86  
87      /*
88       * @see org.seasar.uruma.component.UIElementVisitor#visit(org.seasar.uruma.component.Template)
89       */
90      public void visit(final Template template) {
91          // Do nothing.
92      }
93  }