XMLAnnotationIterator


1   /*******************************************************************************
2    * Copyright (c) 2000, 2003 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials 
4    * are made available under the terms of the Common Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/cpl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.ant.internal.ui.editor.text;
12  
13  import java.util.Iterator  ;
14  import org.eclipse.jface.text.source.IAnnotationModel;
15  
16  
17  /**
18   * Filters problems based on their types.
19   */
20  public class XMLAnnotationIterator implements Iterator   {
21              
22      private Iterator   fIterator;
23      private IXMLAnnotation fNext;
24      private boolean fSkipIrrelevants;
25      
26      public XMLAnnotationIterator(IAnnotationModel model, boolean skipIrrelevants) {
27          fIterator= model.getAnnotationIterator();
28          fSkipIrrelevants= skipIrrelevants;
29          skip();
30      }
31      
32      private void skip() {
33          while (fIterator.hasNext()) {
34              Object   next= fIterator.next();
35              if (next instanceof IXMLAnnotation) {
36                  IXMLAnnotation a= (IXMLAnnotation) next;
37                  if (fSkipIrrelevants) {
38                      if (a.isRelevant()) {
39                          fNext= a;
40                          return;
41                      }
42                  } else {
43                      fNext= a;
44                      return;
45                  }
46              }
47          }
48          fNext= null;
49      }
50      
51      /*
52       * @see Iterator#hasNext()
53       */
54      public boolean hasNext() {
55          return fNext != null;
56      }
57  
58      /*
59       * @see Iterator#next()
60       */
61      public Object   next() {
62          try {
63              return fNext;
64          } finally {
65              skip();
66          }
67      }
68  
69      /*
70       * @see Iterator#remove()
71       */
72      public void remove() {
73          throw new UnsupportedOperationException  ();
74      }
75  }
76
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