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

java.lang.Object
  extended by java.io.InputStream
      extended by org.apache.activemq.store.kahadb.disk.util.DataByteArrayInputStream
All Implemented Interfaces:
Closeable, DataInput

public final class DataByteArrayInputStream
extends InputStream
implements DataInput

Optimized ByteArrayInputStream that can be used more than once


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


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