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1
11 package org.eclipse.ltk.internal.core.refactoring;
12
13 import org.eclipse.core.runtime.Assert;
14 import org.eclipse.core.runtime.CoreException;
15
16 import org.eclipse.core.resources.IFile;
17 import org.eclipse.core.resources.IResource;
18
19 import org.eclipse.jface.text.BadLocationException;
20 import org.eclipse.jface.text.IDocument;
21 import org.eclipse.jface.text.IDocumentExtension4;
22
23 import org.eclipse.ltk.core.refactoring.ContentStamp;
24
25 public class ContentStamps {
26
27 private static class ContentStampImpl extends ContentStamp {
28 private int fKind;
29 private long fValue;
30 private long fFileStamp;
31
32 public static final int FILE= 1;
33 public static final int DOCUMENT= 2;
34
35 private static ContentStamp createFileStamp(long value) {
36 return new ContentStampImpl(FILE, value, value);
37 }
38
39 private static ContentStamp createDocumentStamp(long value, long fileValue) {
40 return new ContentStampImpl(DOCUMENT, value, fileValue);
41 }
42
43 private ContentStampImpl(int kind, long value, long filestamp) {
44 fKind= kind;
45 fValue= value;
46 fFileStamp= filestamp;
47 }
48 public boolean isFileStamp() {
49 return fKind == FILE;
50 }
51 public boolean isDocumentStamp() {
52 return fKind == DOCUMENT;
53 }
54 public long getValue() {
55 return fValue;
56 }
57 public long getFileValue() {
58 return fFileStamp;
59 }
60 public boolean isNullStamp() {
61 return false;
62 }
63 public boolean equals(Object  obj) {
64 if (!(obj instanceof ContentStampImpl))
65 return false;
66 return ((ContentStampImpl)obj).fValue == fValue;
67 }
68 public int hashCode() {
69 return (int)fValue;
70 }
71 public String toString() {
72 return "Stamp: " + fValue; }
74 }
75
76 private static class NullContentStamp extends ContentStamp {
77 public boolean isNullStamp() {
78 return true;
79 }
80 public String toString() {
81 return "Null Stamp"; }
83 }
84
85 public static final ContentStamp NULL_CONTENT_STAMP= new NullContentStamp();
86
87 public static ContentStamp get(IFile file, IDocument document) {
88 if (document instanceof IDocumentExtension4) {
89 long stamp= ((IDocumentExtension4)document).getModificationStamp();
90 if (stamp == IDocumentExtension4.UNKNOWN_MODIFICATION_STAMP)
91 return NULL_CONTENT_STAMP;
92 return ContentStampImpl.createDocumentStamp(stamp, file.getModificationStamp());
93 }
94 long stamp= file.getModificationStamp();
95 if (stamp == IResource.NULL_STAMP)
96 return NULL_CONTENT_STAMP;
97 return ContentStampImpl.createFileStamp(stamp);
98 }
99
100 public static void set(IFile file, ContentStamp s) throws CoreException {
101 if (!(s instanceof ContentStampImpl))
102 return;
103 ContentStampImpl stamp= (ContentStampImpl)s;
104 long value= stamp.getFileValue();
105 Assert.isTrue(value != IResource.NULL_STAMP);
106 file.revertModificationStamp(value);
107 }
108
109 public static boolean set(IDocument document, ContentStamp s) throws CoreException {
110 if (!(s instanceof ContentStampImpl))
111 return false;
112 ContentStampImpl stamp= (ContentStampImpl)s;
113 if (document instanceof IDocumentExtension4 && stamp.isDocumentStamp()) {
114 try {
115 ((IDocumentExtension4)document).replace(0, 0, "", stamp.getValue()); return true;
117 } catch (BadLocationException e) {
118 throw Changes.asCoreException(e);
119 }
120 }
121 return false;
122 }
123 }
124 |
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