/**
* reads the content of a group of existing files in a zipped block
*
* @param domain The namespace used to identify the application domain (1st level directory) to
* use
* @param paths The paths relative to the domain for the files to be read
* @param offset The offset in the file to start reading from
* @param len The length of the block in bytes in zipped form
* @return The contents of the file in zipped form together with the description of the files
*/
public MultiFileBlock readFromStreamZipped(String[] paths, long offset, int len) {
MultiFileBlock block = null;
try {
if (_isLocal) {
int startFileIndex =
Util.getStartFileIndex(
_rootFile.getCanonicalPath() + File.separatorChar, paths, offset);
long startFileOffset =
Util.getStartFileOffset(
_rootFile.getCanonicalPath() + File.separatorChar, paths, offset);
int i = startFileIndex;
long j = startFileOffset;
// int bufSize=0;
int totalBufSize = 0;
int readResult = 0;
ByteArrayOutputStream bOut = new ByteArrayOutputStream(len);
GZIPOutputStream zOut = new GZIPOutputStream(bOut, len);
block = new MultiFileBlock();
while (totalBufSize < len && i < paths.length) {
File tmpFile = new File(_rootFile.getCanonicalPath() + File.separatorChar + paths[i]);
if (tmpFile.isFile() && tmpFile.exists()) {
RandomAccessFile in = new RandomAccessFile(tmpFile, "r");
byte[] tmpBuf = new byte[len - totalBufSize];
in.seek(j);
while (totalBufSize < len && in.getFilePointer() < in.length()) {
readResult = in.read(tmpBuf);
if (readResult != -1) {
zOut.write(tmpBuf, 0, readResult);
// bufSize = bOut.size();
totalBufSize += readResult;
} else {
break;
}
}
BlockFileDescriptor des = new BlockFileDescriptor(_domain, paths[i], in.length());
block.addBlockFileDescriptor(des);
in.close();
i++;
j = 0;
} else {
return null;
}
}
zOut.close();
block.setBlockData(bOut.toByteArray());
} else {
block = _remote.readFromStreamZipped(_domain, paths, offset, len);
}
} catch (Exception ex) {
ex.printStackTrace();
}
return block;
}
/**
* write zipped data to a group of existing files in a webdav server to be stored in the original
* form using the current domain
*
* @param paths The paths relative to the domain for the files to be written
* @param block The zipped contents of the block of data to be written and the description for
* each file
* @param last true if this is the last block of data
* @return The total number of bytes stored or null if method failed
*/
public long writeToStreamZipped(String[] paths, MultiFileBlock block, boolean last) {
long result = -1L;
if (_tempFile == null) _tempFile = Util.createCache();
try {
byte[] buffer = block.getBlockData();
ByteArrayInputStream bIn = new ByteArrayInputStream(buffer);
GZIPInputStream zIn = new GZIPInputStream(bIn);
int bufSize = 0;
byte[] tmpBuf = new byte[buffer.length];
FileOutputStream fOut = new FileOutputStream(_tempFile.getCanonicalPath(), true);
BlockFileDescriptor des = block.getBlockFileDescriptor(0);
int i = 1;
do {
bufSize = zIn.read(tmpBuf);
if (bufSize != -1) {
long partSize = des.getFileSize() - _tempFile.length();
if (partSize < bufSize) {
fOut.write(tmpBuf, 0, (int) partSize);
fOut.close();
if (_isLocal) {
File partRootFile = Util.initLocalResource(des.getFileDomain());
File tmpFile =
new File(
partRootFile.getCanonicalPath() + File.separatorChar + des.getFilePath());
if (_tempFile.renameTo(tmpFile)) {
result = tmpFile.length();
}
} else {
WebdavResource webdavRes = Util.initWebdavResource(_domain);
if (webdavRes == null) {
_tempFile.delete();
_tempFile = null;
return result;
}
result = Util.putFile(webdavRes, des.getFileDomain(), des.getFilePath(), _tempFile);
}
_tempFile = Util.createCache();
des = block.getBlockFileDescriptor(i);
i++;
fOut = new FileOutputStream(_tempFile.getCanonicalPath(), true);
fOut.write(tmpBuf, (int) partSize, (int) (bufSize - partSize));
} else {
fOut.write(tmpBuf, 0, bufSize);
}
fOut.flush();
}
} while (bufSize == tmpBuf.length);
fOut.close();
zIn.close();
bIn.close();
if (last) {
if (_isLocal) {
File partRootFile = Util.initLocalResource(des.getFileDomain());
File tmpFile =
new File(partRootFile.getCanonicalPath() + File.separatorChar + des.getFilePath());
if (_tempFile.renameTo(tmpFile)) {
_tempFile = null;
return tmpFile.length();
}
} else {
WebdavResource webdavRes = Util.initWebdavResource(_domain);
if (webdavRes == null) {
_tempFile.delete();
_tempFile = null;
return result;
}
result = Util.putFile(webdavRes, des.getFileDomain(), des.getFilePath(), _tempFile);
}
} else {
return _tempFile.length();
}
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}