CollectionAdapter


1   package freemarker.ext.beans;
2   
3   import java.util.AbstractCollection  ;
4   import java.util.Iterator  ;
5   
6   import freemarker.template.TemplateCollectionModel;
7   import freemarker.template.TemplateModel;
8   import freemarker.template.TemplateModelAdapter;
9   import freemarker.template.TemplateModelException;
10  import freemarker.template.TemplateModelIterator;
11  import freemarker.template.utility.UndeclaredThrowableException;
12  
13  /**
14   * @author Attila Szegedi
15   * @version $Id: CollectionAdapter.java,v 1.2 2005/06/12 19:03:04 szegedia Exp $
16   */
17  class CollectionAdapter extends AbstractCollection   implements TemplateModelAdapter {
18      private final BeansWrapper wrapper;
19      private final TemplateCollectionModel model;
20      
21      CollectionAdapter(TemplateCollectionModel model, BeansWrapper wrapper) {
22          this.model = model;
23          this.wrapper = wrapper;
24      }
25      
26      public TemplateModel getTemplateModel() {
27          return model;
28      }
29      
30      public int size() {
31          throw new UnsupportedOperationException  ();
32      }
33  
34      public Iterator   iterator() {
35          try {
36              return new Iterator  () {
37                  final TemplateModelIterator i = model.iterator();
38      
39                  public boolean hasNext() {
40                      try {
41                          return i.hasNext();
42                      }
43                      catch(TemplateModelException e) {
44                          throw new UndeclaredThrowableException(e);
45                      }
46                  }
47                  
48                  public Object   next() {
49                      try {
50                          return wrapper.unwrap(i.next());
51                      }
52                      catch(TemplateModelException e) {
53                          throw new UndeclaredThrowableException(e);
54                      }
55                  }
56                  
57                  public void remove() {
58                      throw new UnsupportedOperationException  ();
59                  }
60              };
61          }
62          catch(TemplateModelException e) {
63              throw new UndeclaredThrowableException(e);
64          }
65      }
66  }
67
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