uk.org.ogsadai.common
Class BlockReaderInputStream

java.lang.Object
  |
  +--java.io.InputStream
        |
        +--uk.org.ogsadai.common.BlockReaderInputStream

public class BlockReaderInputStream

extends java.io.InputStream

An java.io.InputStream that wraps a BlockReader.

The blocks contained in the BlockReader must be Strings, byte[] or implementations of the org.w3c.dom.Node interface.

Author:

The OGSA-DAI Project Team

Field Summary

private static java.lang.String	COPYRIGHT_NOTICE
private boolean	mActive
private int	mAmount
private int	mAvailable
private byte[]	mBlock
private BlockReader	mBlockReader
private byte[]	mByte
private int	mBytesRead
private int	mIndex
private int	mNeeded

Fields inherited from class java.io.InputStream

Constructor Summary

BlockReaderInputStream(BlockReader blockReader)
Constructs a new object that wraps the given BlockReader.

Method Summary

private void	getNodeBlock(org.w3c.dom.Node node) Converts a block that is a Document Object Model org.w3c.dom.Node into a byte[] and stores this internally.
private void	nextBlock() Gets the next block from the BlockReader if there are any blocks still to get.
int	read()
int	read(byte[] bytes, int index, int length)

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

COPYRIGHT_NOTICE

private static final java.lang.String COPYRIGHT_NOTICE

See Also:

Constant Field Values

mBlockReader

private final BlockReader mBlockReader

mBlock

private byte[] mBlock

mIndex

private int mIndex

mAvailable

private int mAvailable

mNeeded

private int mNeeded

mAmount

private int mAmount

mBytesRead

private int mBytesRead

mActive

private boolean mActive

mByte

private byte[] mByte

Constructor Detail

BlockReaderInputStream

public BlockReaderInputStream(BlockReader blockReader)

Constructs a new object that wraps the given BlockReader.

Parameters:

blockReader - The BlockReader to wrap.

Method Detail

read

public int read(byte[] bytes,
                int index,
                int length)
         throws java.io.IOException

Overrides:

read in class java.io.InputStream

java.io.IOException

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

java.io.IOException

nextBlock

private void nextBlock()
                throws java.io.IOException

Gets the next block from the BlockReader if there are any blocks still to get.

Throws:

java.io.IOException - if an I/O error occurs caused by an unsupported block type being provided by the wrapped BlockReader. The IOException will have a UnsupportedBlockException as its cause.

getNodeBlock

private void getNodeBlock(org.w3c.dom.Node node)

Converts a block that is a Document Object Model org.w3c.dom.Node into a byte[] and stores this internally.

Parameters:

node - The Node to convert.