public static int writeStreamTo(
final InputStream input, final OutputStream output, int bufferSize) throws IOException {
int available = Math.min(input.available(), 256 * KB);
byte[] buffer = new byte[Math.max(bufferSize, available)];
int answer = 0;
int count = input.read(buffer);
while (count >= 0) {
output.write(buffer, 0, count);
answer += count;
count = input.read(buffer);
}
return answer;
}
/** Generates the transitive closure of the Class-Path attribute for the specified jar file. */
List<String> getJarPath(String jar) throws IOException {
List<String> files = new ArrayList<String>();
files.add(jar);
jarPaths.add(jar);
// take out the current path
String path = jar.substring(0, Math.max(0, jar.lastIndexOf('/') + 1));
// class path attribute will give us jar file name with
// '/' as separators, so we need to change them to the
// appropriate one before we open the jar file.
JarFile rf = new JarFile(jar.replace('/', File.separatorChar));
if (rf != null) {
Manifest man = rf.getManifest();
if (man != null) {
Attributes attr = man.getMainAttributes();
if (attr != null) {
String value = attr.getValue(Attributes.Name.CLASS_PATH);
if (value != null) {
StringTokenizer st = new StringTokenizer(value);
while (st.hasMoreTokens()) {
String ajar = st.nextToken();
if (!ajar.endsWith("/")) { // it is a jar file
ajar = path.concat(ajar);
/* check on cyclic dependency */
if (!jarPaths.contains(ajar)) {
files.addAll(getJarPath(ajar));
}
}
}
}
}
}
}
rf.close();
return files;
}