org.apache.pig.data

Class WritableByteArray

java.lang.Object

java.io.OutputStream

java.io.ByteArrayOutputStream

org.apache.pig.data.WritableByteArray

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class WritableByteArray
extends java.io.ByteArrayOutputStream

A reusable byte buffer implementation

This saves memory over creating a new byte[] and ByteArrayOutputStream each time data is written.

Typical usage is something like the following:

 WritableByteArray buffer = new WritableByteArray();
 while (... loop condition ...) {
   buffer.reset();
   ... write to buffer ...
   byte[] data = buffer.getData();
   int dataLength = buffer.getLength();
   ... write data to its ultimate destination ...
 }
 

Field Summary

Fields inherited from class java.io.ByteArrayOutputStream

buf, count

Constructor Summary

Constructors

Constructor and Description
WritableByteArray()
WritableByteArray(byte[] buf)
WritableByteArray(int size)

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	getData() Returns the current contents of the buffer.
int	getLength() Returns the length of the valid data currently in the buffer

Methods inherited from class java.io.ByteArrayOutputStream

close, reset, size, toByteArray, toString, toString, toString, write, write, writeTo

Methods inherited from class java.io.OutputStream

flush, write

Methods inherited from class java.lang.Object

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

Constructor Detail

WritableByteArray

public WritableByteArray()

WritableByteArray

public WritableByteArray(int size)

WritableByteArray

public WritableByteArray(byte[] buf)

Method Detail

getData

public byte[] getData()

Returns the current contents of the buffer. Data is only valid to getLength().

Returns:

contents of the buffer

getLength

public int getLength()

Returns the length of the valid data currently in the buffer

Returns:

length of valid data