Package org.apache.hadoop.hbase.util

Class Writables

java.lang.Object
org.apache.hadoop.hbase.util.Writables
@Private public class Writables extends Object
Utility class with methods for manipulating Writable objects

  • Constructor Summary

    Constructors
    Constructor
    Description
    Writables()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static org.apache.hadoop.io.Writable
    copyWritable(byte[] bytes, org.apache.hadoop.io.Writable tgt)
    Copy one Writable to another.
    static org.apache.hadoop.io.Writable
    copyWritable(org.apache.hadoop.io.Writable src, org.apache.hadoop.io.Writable tgt)
    Copy one Writable to another.
    static byte[]
    getBytes(org.apache.hadoop.io.Writable w)
    Get the Writable's contents as a byte array
    static byte[]
    getBytes(org.apache.hadoop.io.Writable... ws)
    Put a bunch of Writables as bytes all into the one byte array.
    static org.apache.hadoop.io.Writable
    getWritable(byte[] bytes, int offset, int length, org.apache.hadoop.io.Writable w)
    Set bytes into the passed Writable by calling its Writable.readFields(java.io.DataInput).
    static org.apache.hadoop.io.Writable
    getWritable(byte[] bytes, org.apache.hadoop.io.Writable w)
    Set bytes into the passed Writable by calling its Writable.readFields(java.io.DataInput).

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

  • Method Details

    • getBytes

      public static byte[] getBytes(org.apache.hadoop.io.Writable w) throws IOException
      Get the Writable's contents as a byte array
      Parameters:
      w - writable
      Returns:
      The bytes of w gotten by running its Writable.write(java.io.DataOutput) method.
      Throws:
      IOException - e
      See Also:

    • 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

    • 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

    • 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