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com.tangosol.io.nio
Class ByteBufferReadBuffer

java.lang.Object
com.tangosol.util.Base
com.tangosol.io.AbstractReadBuffer
com.tangosol.io.nio.ByteBufferReadBuffer

All Implemented Interfaces:

ReadBuffer, ByteSequence, java.lang.Cloneable

public class ByteBufferReadBuffer

extends AbstractReadBuffer

implements ReadBuffer

A ReadBuffer implementation on top of a Java NIO ByteBuffer.

Author:

cp 2006.04.05

Nested Class Summary

class

ByteBufferReadBuffer.ByteBufferInput This is a simple implementation of the BufferInput interface on top of a ByteBuffer.

Nested classes/interfaces inherited from class com.tangosol.io.AbstractReadBuffer

AbstractReadBuffer.AbstractBufferInput

Nested classes/interfaces inherited from interface com.tangosol.io.ReadBuffer

ReadBuffer.BufferInput

Field Summary

Fields inherited from class com.tangosol.io.AbstractReadBuffer

NO_BINARY, NO_BYTES

Constructor Summary

ByteBufferReadBuffer(java.nio.ByteBuffer buf)
Construct a ByteBufferReadBuffer on an NIO ByteBuffer.

Method Summary

byte	byteAt(int of) Returns the byte at the specified offset.
java.lang.Object	clone() Create a clone of this ReadBuffer object.
void	copyBytes(int ofBegin, int ofEnd, byte[] abDest, int ofDest) Copies bytes from this ReadBuffer into the destination byte array.
java.nio.ByteBuffer	getByteBuffer() Obtain the ByteBuffer that this ReadBuffer is based on.
protected ReadBuffer.BufferInput	instantiateBufferInput() Factory method: Instantiate a BufferInput object to read data from the ReadBuffer.
protected ReadBuffer	instantiateReadBuffer(int of, int cb) Factory method: Instantiate a ReadBuffer for a portion of this ReadBuffer.
int	length() Determine the length of the buffer.
Binary	toBinary(int of, int cb) Returns a Binary object that holds the specified portion of this ReadBuffer.
byte[]	toByteArray(int of, int cb) Get a portion of the contents of the ReadBuffer as a byte array.

Methods inherited from class com.tangosol.io.AbstractReadBuffer

checkBounds, equals, getBufferInput, getReadBuffer, subSequence, toBinary, toByteArray

Methods inherited from interface com.tangosol.io.ReadBuffer

equals, getBufferInput, getReadBuffer, subSequence, toBinary, toByteArray

Constructor Detail

ByteBufferReadBuffer

public ByteBufferReadBuffer(java.nio.ByteBuffer buf)

Construct a ByteBufferReadBuffer on an NIO ByteBuffer.

Parameters:

buf - the underlying NIO ByteBuffer

Method Detail

getByteBuffer

public java.nio.ByteBuffer getByteBuffer()

Obtain the ByteBuffer that this ReadBuffer is based on.

Returns:

the underlying ByteBuffer

length

public int length()

Determine the length of the buffer.

Specified by:

length in interface ReadBuffer

Specified by:

length in interface ByteSequence

Returns:

the number of bytes of data represented by this ReadBuffer

byteAt

public byte byteAt(int of)

Returns the byte at the specified offset. An offset ranges from 0 to length() - 1. The first byte of the sequence is at offset 0, the next at offset 1, and so on, as for array indexing.

Specified by:

byteAt in interface ReadBuffer

Specified by:

byteAt in interface ByteSequence

Parameters:

of - the offset (index) of the byte

Returns:

the byte at the specified offset in this ReadBuffer

copyBytes

public void copyBytes(int ofBegin,
                      int ofEnd,
                      byte[] abDest,
                      int ofDest)

Copies bytes from this ReadBuffer into the destination byte array.

The first byte to be copied is at offset ofBegin; the last byte to be copied is at offset ofEnd-1 (thus the total number of bytes to be copied is ofEnd - ofBegin). The bytes are copied into the subarray of abDest starting at offset ofDest and ending at index:

     ofDest + (ofEnd - ofBegin) - 1
 

This method is the ReadBuffer equivalent of String.getChars(int, int, char[], int). It allows the caller to extract a chunk of bytes into the caller's own array.

Specified by:

copyBytes in interface ReadBuffer

Parameters:

ofBegin - offset of the first byte in the ReadBuffer to copy

ofEnd - offset after the last byte in the ReadBuffer to copy

abDest - the destination byte array

ofDest - the offset in the destination byte array to copy the first byte to

toByteArray

public byte[] toByteArray(int of,
                          int cb)

Get a portion of the contents of the ReadBuffer as a byte array.

This is the equivalent of getReadBuffer(of, cb).toByteArray().

Specified by:

toByteArray in interface ReadBuffer

Overrides:

toByteArray in class AbstractReadBuffer

Parameters:

of - the beginning index, inclusive

cb - the number of bytes to include in the resulting byte[]

Returns:

a byte[] containing the specified portion of this ReadBuffer

toBinary

public Binary toBinary(int of,
                       int cb)

Returns a Binary object that holds the specified portion of this ReadBuffer.

This is the equivalent of getReadBuffer(of, cb).toBinary().

Specified by:

toBinary in interface ReadBuffer

Overrides:

toBinary in class AbstractReadBuffer

Parameters:

of - the beginning index, inclusive

cb - the number of bytes to include in the Binary object

Returns:

a Binary object containing the specified portion of this ReadBuffer

clone

public java.lang.Object clone()

Create a clone of this ReadBuffer object.

Specified by:

clone in interface ReadBuffer

Overrides:

clone in class AbstractReadBuffer

Returns:

a ReadBuffer object with the same contents as this ReadBuffer object

instantiateReadBuffer

protected ReadBuffer instantiateReadBuffer(int of,
                                           int cb)

Factory method: Instantiate a ReadBuffer for a portion of this ReadBuffer.

Specified by:

instantiateReadBuffer in class AbstractReadBuffer

Parameters:

of - the beginning index, inclusive

cb - the number of bytes to include in the resulting ReadBuffer

Returns:

a ReadBuffer that represents a portion of this ReadBuffer

instantiateBufferInput

protected ReadBuffer.BufferInput instantiateBufferInput()

Factory method: Instantiate a BufferInput object to read data from the ReadBuffer.

Specified by:

instantiateBufferInput in class AbstractReadBuffer

Returns:

a new BufferInput reading from this ReadBuffer

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