org.apache.activemq.store.kahadb.disk.util

Class DataByteArrayInputStream

java.lang.Object

java.io.InputStream

org.apache.activemq.store.kahadb.disk.util.DataByteArrayInputStream

All Implemented Interfaces:

Closeable, DataInput, AutoCloseable

public final class DataByteArrayInputStream
extends InputStream
implements DataInput

Optimized ByteArrayInputStream that can be used more than once

Constructor Summary

Constructors

Constructor and Description
DataByteArrayInputStream() Creates WireByteArrayInputStream with a minmalist byte array
DataByteArrayInputStream(byte[] buf) Creates a StoreByteArrayInputStream.
DataByteArrayInputStream(ByteSequence sequence) Creates a StoreByteArrayInputStream.

Method Summary

Methods

Modifier and Type	Method and Description
int	available()
int	getLength()
int	getPos()
byte[]	getRawData()
int	read() Reads the next byte of data from this input stream.
int	read(byte[] b, int off, int len) Reads up to len bytes of data into an array of bytes from this input stream.
boolean	readBoolean()
byte	readByte()
char	readChar()
double	readDouble()
float	readFloat()
void	readFully(byte[] b)
void	readFully(byte[] b, int off, int len)
int	readInt()
String	readLine()
long	readLong()
short	readShort()
int	readUnsignedByte()
int	readUnsignedShort()
String	readUTF()
void	restart()
void	restart(byte[] newBuff) reset the StoreByteArrayInputStream to use an new byte array
void	restart(ByteSequence sequence) reset the StoreByteArrayInputStream to use an new ByteSequence
void	restart(int size) re-start the input stream - reusing the current buffer
void	setLength(int length)
void	setPos(int pos)
int	size()
int	skipBytes(int n)

Methods inherited from class java.io.InputStream

close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

DataByteArrayInputStream

public DataByteArrayInputStream(byte[] buf)

Creates a StoreByteArrayInputStream.

Parameters:

buf - the input buffer.

DataByteArrayInputStream

public DataByteArrayInputStream(ByteSequence sequence)

Creates a StoreByteArrayInputStream.

Parameters:

sequence - the input buffer.

DataByteArrayInputStream

public DataByteArrayInputStream()

Creates WireByteArrayInputStream with a minmalist byte array

Method Detail

size

public int size()

Returns:

the size

getRawData

public byte[] getRawData()

Returns:

the underlying data array

restart

public void restart(byte[] newBuff)

reset the StoreByteArrayInputStream to use an new byte array

Parameters:

newBuff -

restart

public void restart()

restart

public void restart(ByteSequence sequence)

reset the StoreByteArrayInputStream to use an new ByteSequence

Parameters:

sequence -

restart

public void restart(int size)

re-start the input stream - reusing the current buffer

Parameters:

size -

read

public int read()

Reads the next byte of data from this input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned.

This read method cannot block.

Specified by:

read in class InputStream

Returns:

the next byte of data, or -1 if the end of the stream has been reached.

read

public int read(byte[] b,
       int off,
       int len)

Reads up to len bytes of data into an array of bytes from this input stream.

Overrides:

read in class InputStream

Parameters:

b - the buffer into which the data is read.

off - the start offset of the data.

len - the maximum number of bytes read.

Returns:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

available

public int available()

Overrides:

available in class InputStream

Returns:

the number of bytes that can be read from the input stream without blocking.

readFully

public void readFully(byte[] b)

Specified by:

readFully in interface DataInput

readFully

public void readFully(byte[] b,
             int off,
             int len)

Specified by:

readFully in interface DataInput

skipBytes

public int skipBytes(int n)

Specified by:

skipBytes in interface DataInput

readBoolean

public boolean readBoolean()

Specified by:

readBoolean in interface DataInput

readByte

public byte readByte()

Specified by:

readByte in interface DataInput

readUnsignedByte

public int readUnsignedByte()

Specified by:

readUnsignedByte in interface DataInput

readShort

public short readShort()

Specified by:

readShort in interface DataInput

readUnsignedShort

public int readUnsignedShort()

Specified by:

readUnsignedShort in interface DataInput

readChar

public char readChar()

Specified by:

readChar in interface DataInput

readInt

public int readInt()

Specified by:

readInt in interface DataInput

readLong

public long readLong()

Specified by:

readLong in interface DataInput

readFloat

public float readFloat()
                throws IOException

Specified by:

readFloat in interface DataInput

Throws:

IOException

readDouble

public double readDouble()
                  throws IOException

Specified by:

readDouble in interface DataInput

Throws:

IOException

readLine

public String readLine()

Specified by:

readLine in interface DataInput

readUTF

public String readUTF()
               throws IOException

Specified by:

readUTF in interface DataInput

Throws:

IOException

getPos

public int getPos()

setPos

public void setPos(int pos)

getLength

public int getLength()

setLength

public void setLength(int length)