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Java > Open Source Codes > org > eclipse > jdt > internal > ui > javaeditor > JavaAnnotationIterator


1 /*******************************************************************************
2  * Copyright (c) 2000, 2005 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.jdt.internal.ui.javaeditor;
12
13 import java.util.Collections JavaDoc;
14 import java.util.Iterator JavaDoc;
15
16 import org.eclipse.jface.text.source.Annotation;
17 import org.eclipse.jface.text.source.IAnnotationModel;
18
19
20 /**
21  * Filters problems based on their types.
22  */
23 public class JavaAnnotationIterator implements Iterator JavaDoc {
24
25     private Iterator JavaDoc fIterator;
26     private Annotation fNext;
27     private boolean fSkipIrrelevants;
28     private boolean fReturnAllAnnotations;
29
30     /**
31      * Equivalent to <code>JavaAnnotationIterator(model, skipIrrelevants, false)</code>.
32      */
33     public JavaAnnotationIterator(IAnnotationModel model, boolean skipIrrelevants) {
34         this(model, skipIrrelevants, false);
35     }
36
37     /**
38      * Returns a new JavaAnnotationIterator.
39      * @param model the annotation model
40      * @param skipIrrelevants whether to skip irrelevant annotations
41      * @param returnAllAnnotations Whether to return non IJavaAnnotations as well
42      */
43     public JavaAnnotationIterator(IAnnotationModel model, boolean skipIrrelevants, boolean returnAllAnnotations) {
44         fReturnAllAnnotations= returnAllAnnotations;
45         if (model != null)
46             fIterator= model.getAnnotationIterator();
47         else
48             fIterator= Collections.EMPTY_LIST.iterator();
49         fSkipIrrelevants= skipIrrelevants;
50         skip();
51     }
52
53     private void skip() {
54         while (fIterator.hasNext()) {
55             Annotation next= (Annotation) fIterator.next();
56             if (next instanceof IJavaAnnotation) {
57                 if (fSkipIrrelevants) {
58                     if (!next.isMarkedDeleted()) {
59                         fNext= next;
60                         return;
61                     }
62                 } else {
63                     fNext= next;
64                     return;
65                 }
66             } else if (fReturnAllAnnotations) {
67                 fNext= next;
68                 return;
69             }
70         }
71         fNext= null;
72     }
73
74     /*
75      * @see Iterator#hasNext()
76      */
77     public boolean hasNext() {
78         return fNext != null;
79     }
80
81     /*
82      * @see Iterator#next()
83      */
84     public Object JavaDoc next() {
85         try {
86             return fNext;
87         } finally {
88             skip();
89         }
90     }
91
92     /*
93      * @see Iterator#remove()
94      */
95     public void remove() {
96         throw new UnsupportedOperationException JavaDoc();
97     }
98 }
99
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