Constructor Detail

• Writables

  public Writables()

Method Detail

• getBytes

  public static byte[] getBytes(org.apache.hadoop.io.Writable w)
                         throws IOException

  Parameters:

  w - writable

  Returns:

  The bytes of w gotten by running its Writable.write(java.io.DataOutput) method.

  Throws:

  IOException - e

  See Also:

  getWritable(byte[], Writable)

• getBytes

  public static byte[] getBytes(org.apache.hadoop.io.Writable... ws)
                         throws IOException

  Put a bunch of Writables as bytes all into the one byte array.

  Parameters:

  ws - writable

  Returns:

  The bytes of w gotten by running its Writable.write(java.io.DataOutput) method.

  Throws:

  IOException - e

• getWritable

  public static org.apache.hadoop.io.Writable getWritable(byte[] bytes,
                                          org.apache.hadoop.io.Writable w)
                                                   throws IOException

  Set bytes into the passed Writable by calling its Writable.readFields(java.io.DataInput).

  Parameters:

  bytes - serialized bytes

  w - An empty Writable (usually made by calling the null-arg constructor).

  Returns:

  The passed Writable after its readFields has been called fed by the passed bytes array or IllegalArgumentException if passed null or an empty bytes array.

  Throws:

  IOException - e

  IllegalArgumentException

• getWritable

  public static org.apache.hadoop.io.Writable getWritable(byte[] bytes,
                                          int offset,
                                          int length,
                                          org.apache.hadoop.io.Writable w)
                                                   throws IOException

  Set bytes into the passed Writable by calling its Writable.readFields(java.io.DataInput).

  Parameters:

  bytes - serialized bytes

  offset - offset into array

  length - length of data

  w - An empty Writable (usually made by calling the null-arg constructor).

  Returns:

  The passed Writable after its readFields has been called fed by the passed bytes array or IllegalArgumentException if passed null or an empty bytes array.

  Throws:

  IOException - e

  IllegalArgumentException

• copyWritable

  public static org.apache.hadoop.io.Writable copyWritable(org.apache.hadoop.io.Writable src,
                                           org.apache.hadoop.io.Writable tgt)
                                                    throws IOException

  Copy one Writable to another. Copies bytes using data streams.

  Parameters:

  src - Source Writable

  tgt - Target Writable

  Returns:

  The target Writable.

  Throws:

  IOException - e

• copyWritable

  public static org.apache.hadoop.io.Writable copyWritable(byte[] bytes,
                                           org.apache.hadoop.io.Writable tgt)
                                                    throws IOException

  Copy one Writable to another. Copies bytes using data streams.

  Parameters:

  bytes - Source Writable

  tgt - Target Writable

  Returns:

  The target Writable.

  Throws:

  IOException - e