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com.sleepycat.util
Class FastInputStream

java.lang.Object
  extended by java.io.InputStream
      extended by com.sleepycat.util.FastInputStream
All Implemented Interfaces:
Closeable
Direct Known Subclasses:
TupleInput
public class FastInputStream
extends InputStream

A replacement for ByteArrayInputStream that does not synchronize every byte read.

This class extends InputStream and its read() methods allow it to be used as a standard input stream. In addition, it provides readFast() methods that are not declared to throw IOException. IOException is never thrown by this class.

Field Summary
protected  byte[] buf
           
protected  int len
           
protected  int mark
           
protected  int off
           
 
Constructor Summary
FastInputStream(byte[] buffer)
          Creates an input stream.
FastInputStream(byte[] buffer, int offset, int length)
          Creates an input stream.
 
Method Summary
 int available()
           
 byte[] getBufferBytes()
          Returns the underlying data being read.
 int getBufferLength()
          Returns the end of the buffer being read.
 int getBufferOffset()
          Returns the offset at which data is being read from the buffer.
 void mark(int readLimit)
           
 boolean markSupported()
           
 int read()
           
 int read(byte[] toBuf)
           
 int read(byte[] toBuf, int offset, int length)
           
 int readFast()
          Equivalent to read() but does not throw IOException.
 int readFast(byte[] toBuf)
          Equivalent to read(byte[]) but does not throw IOException.
 int readFast(byte[] toBuf, int offset, int length)
          Equivalent to read(byte[],int,int) but does not throw IOException.
 void reset()
           
 long skip(long count)
           
 void skipFast(int count)
          Equivalent to skip() but takes an int parameter instead of a long, and does not check whether the count given is larger than the number of remaining bytes.
 
Methods inherited from class java.io.InputStream
close
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

len

protected int len

off

protected int off

mark

protected int mark

buf

protected byte[] buf
Constructor Detail

FastInputStream

public FastInputStream(byte[] buffer)
Creates an input stream.

Parameters:
buffer - the data to read.

FastInputStream

public FastInputStream(byte[] buffer,
                       int offset,
                       int length)
Creates an input stream.

Parameters:
buffer - the data to read.
offset - the byte offset at which to begin reading.
length - the number of bytes to read.
Method Detail

available

public int available()
Overrides:
available in class InputStream

markSupported

public boolean markSupported()
Overrides:
markSupported in class InputStream

mark

public void mark(int readLimit)
Overrides:
mark in class InputStream

reset

public void reset()
Overrides:
reset in class InputStream

skip

public long skip(long count)
Overrides:
skip in class InputStream

read

public int read()
Specified by:
read in class InputStream

read

public int read(byte[] toBuf)
Overrides:
read in class InputStream

read

public int read(byte[] toBuf,
                int offset,
                int length)
Overrides:
read in class InputStream

skipFast

public final void skipFast(int count)
Equivalent to skip() but takes an int parameter instead of a long, and does not check whether the count given is larger than the number of remaining bytes.

See Also:
skip(long)

readFast

public final int readFast()
Equivalent to read() but does not throw IOException.

See Also:
read()

readFast

public final int readFast(byte[] toBuf)
Equivalent to read(byte[]) but does not throw IOException.

See Also:
read(byte[])

readFast

public final int readFast(byte[] toBuf,
                          int offset,
                          int length)
Equivalent to read(byte[],int,int) but does not throw IOException.

See Also:
read(byte[],int,int)

getBufferBytes

public final byte[] getBufferBytes()
Returns the underlying data being read.

Returns:
the underlying data.

getBufferOffset

public final int getBufferOffset()
Returns the offset at which data is being read from the buffer.

Returns:
the offset at which data is being read.

getBufferLength

public final int getBufferLength()
Returns the end of the buffer being read.

Returns:
the end of the buffer.
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