/**
* Create a new TarFile for the given file.
*
* @param file
* @throws TarException
* @throws IOException
*/
public TarFile(File file) throws TarException, IOException {
this.file = file;
InputStream in = new FileInputStream(file);
// First, check if it's a GZIPInputStream.
try {
in = new GZIPInputStream(in);
} catch (IOException e) {
// If it is not compressed we close
// the old one and recreate
in.close();
in = new FileInputStream(file);
}
entryEnumerationStream = new TarInputStream(in);
curEntry = entryEnumerationStream.getNextEntry();
}
/**
* Returns a new InputStream for the given file in the tar archive.
*
* @param entry
* @return an input stream for the given file
* @throws TarException
* @throws IOException
*/
public InputStream getInputStream(TarEntry entry) throws TarException, IOException {
if (entryStream == null || !entryStream.skipToEntry(entry)) {
InputStream in = new FileInputStream(file);
// First, check if it's a GZIPInputStream.
try {
in = new GZIPInputStream(in);
} catch (IOException e) {
in = new FileInputStream(file);
}
entryStream =
new TarInputStream(in, entry) {
public void close() {
// Ignore close() since we want to reuse the stream.
}
};
}
if (entryStream == null) {
System.out.println("huh?"); // $NON-NLS-1$
}
return entryStream;
}
/**
* Close the tar file input stream.
*
* @throws IOException if the file cannot be successfully closed
*/
public void close() throws IOException {
entryEnumerationStream.close();
}
public boolean extractTar(String asset, String target) {
byte buf[] = new byte[1024 * 1024];
InputStream assetStream = null;
TarInputStream tis = null;
try {
assetStream = mAssetManager.open(asset, AssetManager.ACCESS_STREAMING);
tis =
new TarInputStream(
new BufferedInputStream(
new GZIPInputStream(new BufferedInputStream(assetStream, 8192)), 8192));
} catch (IOException e) {
Log.e("python", "opening up extract tar", e);
return false;
}
while (true) {
TarEntry entry = null;
try {
entry = tis.getNextEntry();
} catch (java.io.IOException e) {
Log.e("python", "extracting tar", e);
return false;
}
if (entry == null) {
break;
}
Log.i("python", "extracting " + entry.getName());
if (entry.isDirectory()) {
try {
new File(target + "/" + entry.getName()).mkdirs();
} catch (SecurityException e) {
}
;
continue;
}
OutputStream out = null;
String path = target + "/" + entry.getName();
try {
out = new BufferedOutputStream(new FileOutputStream(path), 8192);
} catch (FileNotFoundException e) {
} catch (SecurityException e) {
}
;
if (out == null) {
Log.e("python", "could not open " + path);
return false;
}
try {
while (true) {
int len = tis.read(buf);
if (len == -1) {
break;
}
out.write(buf, 0, len);
}
out.flush();
out.close();
} catch (java.io.IOException e) {
Log.e("python", "extracting zip", e);
return false;
}
}
try {
tis.close();
assetStream.close();
} catch (IOException e) {
// pass
}
return true;
}
