@Override
@SuppressWarnings("unchecked")
public Writable put(Writable key, Writable value) {
addToMap(key.getClass());
addToMap(value.getClass());
return instance.put(key, value);
}
/**
* Make a copy of a writable object using serialization to a buffer.
*
* @param orig The object to copy
* @return The copied object
*/
public static Writable clone(Writable orig, JobConf conf) {
try {
Writable newInst = (Writable) conf.newInstance(orig.getClass());
CopyInCopyOutBuffer buffer = (CopyInCopyOutBuffer) cloneBuffers.get();
buffer.outBuffer.reset();
orig.write(buffer.outBuffer);
buffer.moveData();
newInst.readFields(buffer.inBuffer);
return newInst;
} catch (IOException e) {
throw new RuntimeException("Error writing/reading clone buffer", e);
}
}
/** Utility method for testing writables. */
public static Writable testWritable(Writable before, Configuration conf) throws Exception {
DataOutputBuffer dob = new DataOutputBuffer();
before.write(dob);
DataInputBuffer dib = new DataInputBuffer();
dib.reset(dob.getData(), dob.getLength());
Writable after = (Writable) ReflectionUtils.newInstance(before.getClass(), conf);
after.readFields(dib);
assertEquals(before, after);
return after;
}
