Examples with CrunchRuntimeException org.apache.crunch.impl.mr.run.CrunchRuntimeException used on opensource projects

Example 6 with CrunchRuntimeException

use of org.apache.crunch.impl.mr.run.CrunchRuntimeException in project crunch by cloudera.

the class Writables method deepCopy.

/**
   * Perform a deep copy of a writable value.
   * 
   * @param value
   *          The value to be copied
   * @param writableClass
   *          The Writable class of the value to be copied
   * @return A fully detached deep copy of the input value
   */
public static <T extends Writable> T deepCopy(T value, Class<T> writableClass) {
    ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream();
    DataOutputStream dataOut = new DataOutputStream(byteOutStream);
    T copiedValue = null;
    try {
        value.write(dataOut);
        dataOut.flush();
        ByteArrayInputStream byteInStream = new ByteArrayInputStream(byteOutStream.toByteArray());
        DataInput dataInput = new DataInputStream(byteInStream);
        copiedValue = writableClass.newInstance();
        copiedValue.readFields(dataInput);
    } catch (Exception e) {
        throw new CrunchRuntimeException("Error while deep copying " + value, e);
    }
    return copiedValue;
}