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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2011 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.Iterator; | |
14 | ||
15 | import org.eclipse.core.runtime.CoreException; | |
16 | ||
17 | import org.eclipse.core.resources.IMarker; | |
18 | ||
19 | import org.eclipse.jface.text.source.Annotation; | |
20 | ||
21 | import org.eclipse.ui.texteditor.MarkerAnnotation; | |
22 | ||
23 | ||
24 | /** | |
25 | * Filters problems based on their types. | |
26 | */ | |
27 | public class JavaAnnotationIterator implements Iterator<Annotation> { | |
28 | ||
29 | private Iterator<Annotation> fIterator; | |
30 | private Annotation fNext; | |
31 | private boolean fReturnAllAnnotations; | |
32 | ||
33 | ||
34 | /** | |
35 | * Returns a new JavaAnnotationIterator. | |
36 | * @param parent the parent iterator to iterate over annotations | |
37 | * @param returnAllAnnotations whether to return all annotations or just problem annotations | |
38 | */ | |
39 | public JavaAnnotationIterator(Iterator<Annotation> parent, boolean returnAllAnnotations) { | |
40 | fReturnAllAnnotations= returnAllAnnotations; | |
41 | fIterator= parent; | |
42 | skip(); | |
43 | } | |
44 | ||
45 | private void skip() { | |
46 | while (fIterator.hasNext()) { | |
47 | Annotation next= fIterator.next(); | |
48 | ||
49 | if (next.isMarkedDeleted()) | |
50 | continue; | |
51 | ||
52 | if (fReturnAllAnnotations || next instanceof IJavaAnnotation || isProblemMarkerAnnotation(next)) { | |
53 | fNext= next; | |
54 | return; | |
55 | } | |
56 | } | |
57 | fNext= null; | |
58 | } | |
59 | ||
60 | private static boolean isProblemMarkerAnnotation(Annotation annotation) { | |
61 | if (!(annotation instanceof MarkerAnnotation)) | |
62 | return false; | |
63 | try { | |
64 | return(((MarkerAnnotation)annotation).getMarker().isSubtypeOf(IMarker.PROBLEM)); | |
65 | } catch (CoreException e) { | |
66 | return false; | |
67 | } | |
68 | } | |
69 | ||
70 | /* | |
71 | * @see Iterator#hasNext() | |
72 | */ | |
73 | public boolean hasNext() { | |
74 | return fNext != null; | |
75 | } | |
76 | ||
77 | /* | |
78 | * @see Iterator#next() | |
79 | */ | |
80 | public Annotation next() { | |
81 | try { | |
82 | return fNext; | |
83 | } finally { | |
84 | skip(); | |
85 | } | |
86 | } | |
87 | ||
88 | /* | |
89 | * @see Iterator#remove() | |
90 | */ | |
91 | public void remove() { | |
92 | throw new UnsupportedOperationException(); | |
93 | } | |
94 | } |