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1
11 package org.eclipse.ui.internal.wizards.datatransfer;
12
13 import java.io.FileOutputStream  ;
14 import java.io.IOException ;
15 import java.io.InputStream ;
16 import java.util.zip.CRC32 ;
17 import java.util.zip.ZipEntry ;
18 import java.util.zip.ZipOutputStream ;
19
20 import org.eclipse.core.resources.IFile;
21 import org.eclipse.core.runtime.CoreException;
22
23
24
27 public class ZipFileExporter implements IFileExporter {
28 private ZipOutputStream outputStream;
29
30 private boolean useCompression = true;
31
32
39 public ZipFileExporter(String filename, boolean compress) throws IOException {
40 outputStream = new ZipOutputStream (new FileOutputStream (filename));
41 useCompression = compress;
42 }
43
44
50 public void finished() throws IOException {
51 outputStream.close();
52 }
53
54
62 private void write(ZipEntry entry, IFile contents) throws IOException , CoreException {
63 byte[] readBuffer = new byte[4096];
64
65 if (!useCompression) {
67 entry.setMethod(ZipEntry.STORED);
68 InputStream contentStream = contents.getContents(false);
69 int length = 0;
70 CRC32 checksumCalculator = new CRC32 ();
71 try {
72 int n;
73 while ((n = contentStream.read(readBuffer)) > 0) {
74 checksumCalculator.update(readBuffer, 0, n);
75 length += n;
76 }
77 } finally {
78 if (contentStream != null) {
79 contentStream.close();
80 }
81 }
82
83 entry.setSize(length);
84 entry.setCrc(checksumCalculator.getValue());
85 }
86
87 outputStream.putNextEntry(entry);
88 InputStream contentStream = contents.getContents(false);
89 try {
90 int n;
91 while ((n = contentStream.read(readBuffer)) > 0) {
92 outputStream.write(readBuffer, 0, n);
93 }
94 } finally {
95 if (contentStream != null) {
96 contentStream.close();
97 }
98 }
99 outputStream.closeEntry();
100 }
101
102
110 public void write(IFile resource, String destinationPath)
111 throws IOException , CoreException {
112 ZipEntry newEntry = new ZipEntry (destinationPath);
113 write(newEntry, resource);
114 }
115 }
116 |
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