Source Code Cross Referenced for XarUpdater.java in  » Profiler » JMeasurement » de » mcs » utils » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Profiler » JMeasurement » de.mcs.utils 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * MCS Media Computer Software Copyright (c) 2005 by MCS
003:         * -------------------------------------- Created on 16.01.2004 by w.klaas
004:         * 
005:         * Licensed under the Apache License, Version 2.0 (the "License"); you may not
006:         * use this file except in compliance with the License. You may obtain a copy of
007:         * the License at
008:         * 
009:         * http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
013:         * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
014:         * License for the specific language governing permissions and limitations under
015:         * the License.
016:         */
017:        package de.mcs.utils;
018:
019:        import java.io.BufferedInputStream;
020:        import java.io.File;
021:        import java.io.FileInputStream;
022:        import java.io.FileNotFoundException;
023:        import java.io.FileOutputStream;
024:        import java.io.FilePermission;
025:        import java.io.IOException;
026:        import java.security.AccessControlException;
027:        import java.util.Hashtable;
028:        import java.util.Iterator;
029:        import java.util.Map;
030:        import java.util.jar.JarOutputStream;
031:        import java.util.zip.ZipEntry;
032:        import java.util.zip.ZipInputStream;
033:        import java.util.zip.ZipOutputStream;
034:
035:        /**
036:         * Modifies files in an .ear or .jar archive file.
037:         * 
038:         * @author j.froehlich
039:         */
040:        public class XarUpdater {
041:
042:            /** the archive file to work with. */
043:            private File archiveFile;
044:
045:            /** the archive file to work with. */
046:            private ZipInputStream archive;
047:
048:            /** the base directory. */
049:            private String baseDirPath; // OS dependent path
050:
051:            /** temp name of a file. */
052:            private String zipname;
053:
054:            /**
055:             * converting a filename to a zip name.
056:             * 
057:             * @param osFilename
058:             *            filename to convert
059:             * @return converted name.
060:             */
061:            private String toZipName(final String osFilename) {
062:                String zipName = osFilename;
063:                if (null != baseDirPath && baseDirPath.length() > 0
064:                        && baseDirPath.length() < osFilename.length()
065:                        && osFilename.startsWith(baseDirPath)) {
066:
067:                    zipName = osFilename.substring(baseDirPath.length() + 1);
068:                }
069:                return zipName.replace(File.separatorChar, '/');
070:            }
071:
072:            /**
073:             * Constructing the xar updater.
074:             * 
075:             * @param aArchiveFile
076:             *            The archive file to use.
077:             * @param baseDirFile
078:             *            the base file to work with.
079:             * @throws IOException
080:             *             if something goes wrong.
081:             */
082:            public XarUpdater(final File aArchiveFile, final File baseDirFile)
083:                    throws IOException {
084:                super ();
085:                if (!aArchiveFile.exists()) {
086:                    throw new FileNotFoundException(aArchiveFile
087:                            .getAbsolutePath());
088:                }
089:                if (!aArchiveFile.canWrite()) {
090:                    throw new AccessControlException("No write access",
091:                            new FilePermission(aArchiveFile.getAbsolutePath(),
092:                                    "write"));
093:                }
094:                this .archiveFile = aArchiveFile;
095:
096:                // File(".");
097:                if (null == baseDirFile) {
098:                    throw new NullPointerException(
099:                            "baseDirFile should not be null.");
100:                }
101:                if (!baseDirFile.exists()) {
102:                    throw new FileNotFoundException(baseDirFile
103:                            .getCanonicalPath());
104:                }
105:                if (0 == baseDirFile.getName().length()) {
106:                    baseDirPath = new File(System.getProperty("java.io.tmpdir"))
107:                            .getPath(); // new
108:                } else {
109:                    baseDirPath = baseDirFile.getPath();
110:                }
111:
112:                zipname = toZipName(aArchiveFile.getPath());
113:            }
114:
115:            /**
116:             * Constructing the xar updater.
117:             * 
118:             * @param archiveFilename
119:             *            The archive file to use.
120:             * @param baseDir
121:             *            the base file to work with.
122:             * @throws IOException
123:             *             if something goes wrong.
124:             */
125:            public XarUpdater(final String archiveFilename, final String baseDir)
126:                    throws IOException {
127:                this (new File(archiveFilename), new File(baseDir));
128:            }
129:
130:            /**
131:             * @return getting the archive file.
132:             */
133:            public final File getFile() {
134:                return archiveFile;
135:            }
136:
137:            /** some special dir and file names. */
138:            static final String METAINF_NAME = "META-INF/";
139:
140:            /** some special dir and file names. */
141:            static final String INDEX_NAME = METAINF_NAME + "INDEX.LIST";
142:
143:            /** some special dir and file names. */
144:            static final String MANIFEST_NAME = METAINF_NAME + "MANIFEST.MF";
145:
146:            /**
147:             * adding a file to the zip.
148:             * 
149:             * @param zipoutputstream
150:             *            the outputstream
151:             * @param aName
152:             *            name of the entry
153:             * @param file
154:             *            the file to add
155:             * @param buffer
156:             *            a buffer
157:             * @throws IOException
158:             *             if something goes wrong.
159:             */
160:            public final void addFile(final ZipOutputStream zipoutputstream,
161:                    final String aName, final File file, final byte[] buffer)
162:                    throws IOException {
163:                String name = aName;
164:                boolean isDir = file.isDirectory();
165:                if (isDir) {
166:                    name = name.endsWith("/") ? name : name + "/";
167:                }
168:                if (name.startsWith("/")) {
169:                    name = name.substring(1);
170:                } else if (name.startsWith("./")) {
171:                    name = name.substring(2);
172:                }
173:
174:                if (name.equals("") || name.equals(".") || name.equals(zipname)) {
175:                    return;
176:                }
177:
178:                long l = isDir ? 0L : file.length();
179:
180:                // System.out.print("is file:" + name);
181:                // System.out.println(" length:" + Long.toString(l));
182:
183:                ZipEntry zipentry = new ZipEntry(name);
184:                zipentry.setTime(file.lastModified());
185:                zipentry.setMethod(ZipEntry.DEFLATED);
186:                if (l == 0L) {
187:                    zipentry.setMethod(0);
188:                    zipentry.setSize(0L);
189:                    zipentry.setCrc(0L);
190:                }
191:                zipoutputstream.putNextEntry(zipentry);
192:                if (!isDir) {
193:                    BufferedInputStream bufferedinputstream = new BufferedInputStream(
194:                            new FileInputStream(file));
195:                    int i;
196:                    while ((i = bufferedinputstream.read(buffer, 0,
197:                            buffer.length)) > 0) {
198:                        zipoutputstream.write(buffer, 0, i);
199:                    }
200:
201:                    bufferedinputstream.close();
202:                }
203:                zipoutputstream.closeEntry();
204:
205:            }
206:
207:            /**
208:             * update an archive.
209:             * 
210:             * @param toArchiveFile
211:             *            the archive file to update
212:             * @param files
213:             *            the files to zip
214:             * @param asNames
215:             *            as which names
216:             * @throws IOException
217:             *             if something goes wrong.
218:             */
219:            public final void update(final File toArchiveFile,
220:                    final File[] files, final String[] asNames)
221:                    throws IOException {
222:
223:                if (null == archive) {
224:                    archive = new ZipInputStream(new FileInputStream(
225:                            archiveFile));
226:                }
227:
228:                if (null == files) {
229:                    return;
230:                }
231:                Hashtable<String, File> hashtable = new Hashtable<String, File>();
232:                for (int index = 0; index < files.length; index++) {
233:                    String name = toZipName(files[index].getPath());
234:                    if (null != asNames && null != asNames[index]) {
235:                        name = asNames[index];
236:                    }
237:                    hashtable.put(name, files[index]);
238:                }
239:                hashtable.remove(INDEX_NAME); // currently no META-INF/INDEX.LIST
240:                // support at all
241:                hashtable.remove(MANIFEST_NAME); // currently no META-INF/MANIFEST.MF
242:                // update support
243:
244:                JarOutputStream jaroutputstream = new JarOutputStream(
245:                        new FileOutputStream(toArchiveFile));
246:                jaroutputstream
247:                        .setLevel(java.util.zip.Deflater.BEST_COMPRESSION);
248:
249:                byte[] buffer = new byte[8 * 1024];
250:                ZipEntry zipentry;
251:                while (null != (zipentry = archive.getNextEntry())) {
252:                    String name = zipentry.getName();
253:                    if (!name.equalsIgnoreCase(INDEX_NAME)) {
254:                        if (!hashtable.containsKey(name)) {
255:                            ZipEntry newEntry = new ZipEntry(name);
256:                            newEntry.setMethod(zipentry.getMethod());
257:                            newEntry.setTime(zipentry.getTime());
258:                            newEntry.setComment(zipentry.getComment());
259:                            newEntry.setExtra(zipentry.getExtra());
260:                            if (ZipEntry.STORED == zipentry.getMethod()) {
261:                                newEntry.setSize(zipentry.getSize());
262:                                newEntry.setCrc(zipentry.getCrc());
263:                            }
264:                            jaroutputstream.putNextEntry(newEntry);
265:                            int len;
266:                            while ((len = archive
267:                                    .read(buffer, 0, buffer.length)) != -1) {
268:                                jaroutputstream.write(buffer, 0, len);
269:                            }
270:                        } else {
271:                            addFile(jaroutputstream, name, (File) hashtable
272:                                    .get(name), buffer);
273:                            hashtable.remove(name);
274:                        }
275:                    }
276:                }
277:
278:                if (!hashtable.isEmpty()) {
279:                    for (Iterator iter = hashtable.entrySet().iterator(); iter
280:                            .hasNext();) {
281:                        Map.Entry entry = (Map.Entry) iter.next();
282:                        addFile(jaroutputstream, (String) entry.getKey(),
283:                                (File) entry.getValue(), buffer);
284:                    }
285:                }
286:
287:                jaroutputstream.close();
288:
289:            }
290:
291:            /**
292:             * closing the zip file.
293:             * 
294:             * @throws IOException
295:             *             if something goes wrong.
296:             */
297:
298:            public final void close() throws IOException {
299:                if (null != archive) {
300:                    archive.close();
301:                    archive = null;
302:                }
303:            }
304:
305:            /**
306:             * @return string representing this object.
307:             * @see java.lang.Object#toString()
308:             */
309:            public final String toString() {
310:                return archiveFile.toString();
311:            }
312:
313:        }
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