/**
* Creates a instrumented version of the given class if possible.
*
* @param buffer definition of the class
* @param name a name used for exception messages
* @return instrumented definition
* @throws IOException if the class can't be analyzed
*/
public byte[] instrument(final byte[] buffer, final String name) throws IOException {
try {
if (Java9Support.isPatchRequired(buffer)) {
final byte[] result = instrument(new ClassReader(Java9Support.downgrade(buffer)));
Java9Support.upgrade(result);
return result;
} else {
return instrument(new ClassReader(buffer));
}
} catch (final RuntimeException e) {
throw instrumentError(name, e);
}
}
/**
* Creates a instrumented version of the given class if possible.
*
* @param input stream to read class definition from
* @param name a name used for exception messages
* @return instrumented definition
* @throws IOException if reading data from the stream fails or the class can't be instrumented
*/
public byte[] instrument(final InputStream input, final String name) throws IOException {
try {
return instrument(Java9Support.readFully(input), name);
} catch (final RuntimeException e) {
throw instrumentError(name, e);
}
}
/**
* Creates a instrumented version of the given class file.
*
* @param input stream to read class definition from
* @param output stream to write the instrumented version of the class to
* @param name a name used for exception messages
* @throws IOException if reading data from the stream fails or the class can't be instrumented
*/
public void instrument(final InputStream input, final OutputStream output, final String name)
throws IOException {
try {
output.write(instrument(Java9Support.readFully(input), name));
} catch (final RuntimeException e) {
throw instrumentError(name, e);
}
}