com.lizardtech.djvu
Class DataPool.CachedInputStream

java.lang.Object
  java.io.InputStream
      com.lizardtech.djvu.DataPool.CachedInputStream

All Implemented Interfaces:

java.io.Closeable

Enclosing class:

DataPool

public class DataPool.CachedInputStream
extends java.io.InputStream

This class is an input stream which spans the accessable data in a DataPool object.

Version:

$Revision: 1.10 $

Author:

Bill C. Riemers

Constructor Summary

DataPool.CachedInputStream()
Creates a new CachedInputStream object.

Method Summary

int	available() Query how much data is available without blocking.
DataPool	createDataPool(int size) Create a DataPool representing this input stream.
void	mark(int readLimit) Marks the current location for a reset() later.
boolean	markSuppoted() Query if mark is supported.
int	read() Read the next byte of data ranged 0 to 255.
int	read(byte[] b, int off, int len) Read data into an array of bytes.
int	read16() Read the next two bytes as a posative integer.
int	read24() Read the next three bytes as a posative integer.
int	read8() Read the next bytes as a posative integer.
java.lang.String	readUTF(int size) Read up to the specified number of bytes as a String.
void	reset() Restore the marked position
long	skip(long n) Skip bytes without reading.

Methods inherited from class java.io.InputStream

close, markSupported, read

Methods inherited from class java.lang.Object

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

Constructor Detail

DataPool.CachedInputStream

public DataPool.CachedInputStream()

Creates a new CachedInputStream object.

Method Detail

available

public int available()

Query how much data is available without blocking.

Overrides:

available in class java.io.InputStream

Returns:

number of buffered bytes

createDataPool

public DataPool createDataPool(int size)

Create a DataPool representing this input stream.

Parameters:

size - the amount of data in the DataPool

Returns:

the newly created DataPool

mark

public void mark(int readLimit)

Marks the current location for a reset() later.

Overrides:

mark in class java.io.InputStream

Parameters:

readLimit - ignored

markSuppoted

public boolean markSuppoted()

Query if mark is supported.

Returns:

true

read

public int read()
         throws java.io.IOException

Read the next byte of data ranged 0 to 255. Returns -1 if an EOF has been read.

Specified by:

read in class java.io.InputStream

Returns:

next byte

Throws:

java.io.IOException - if an error occurs

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Read data into an array of bytes.

Overrides:

read in class java.io.InputStream

Parameters:

b - byte array to copy data to

off - byte array offset to start copying to

len - maximum number of bytes to copy

Returns:

number of bytes read

Throws:

java.io.IOException

read16

public int read16()

Read the next two bytes as a posative integer. If EOF is reached, then return -1.

Returns:

the value read

read24

public int read24()

Read the next three bytes as a posative integer. If EOF is reached, then return -1.

Returns:

the value read

read8

public int read8()

Read the next bytes as a posative integer. If EOF is reached, then return -1.

Returns:

the value read

readUTF

public java.lang.String readUTF(int size)
                         throws java.io.IOException

Read up to the specified number of bytes as a String. If conversion from java modified UTF8 fails, then the string will be interpreted using the current locale encoding.

Parameters:

size - maximum number of bytes to read

Returns:

the newly created string

Throws:

java.io.IOException - if an error occurs

reset

public void reset()
           throws java.io.IOException

Restore the marked position

Overrides:

reset in class java.io.InputStream

Throws:

java.io.IOException - if an error occurs

skip

public long skip(long n)
          throws java.io.IOException

Skip bytes without reading.

Overrides:

skip in class java.io.InputStream

Parameters:

n - number of bytes to skip

Returns:

number of bytes actually skipped

Throws:

java.io.IOException - if an error occurs