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java.util.zip
Class ZipFile.PartialInputStream  

java.lang.Object
  java.io.InputStream
      java.util.zip.ZipFile.PartialInputStream

All Implemented Interfaces:

java.io.Closeable

Enclosing class:

ZipFile

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private static final class ZipFile.PartialInputStream

extends java.io.InputStream

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Field Summary
private  byte[]	buffer
private  long	bufferOffset
private  long	end
private  int	pos
private  java.io.RandomAccessFile	raf

 

Constructor Summary

ZipFile.PartialInputStream(java.io.RandomAccessFile raf, int bufferSize)

 

Method Summary
int	available()           This method returns the number of bytes that can be read from this stream before a read can block.
private  void	fillBuffer()
int	read()           This method reads an unsigned byte from the input stream and returns it as an int in the range of 0-255.
int	read(byte[] b, int off, int len)           This method read bytes from a stream and stores them into a caller supplied buffer.
(package private)  void	readFully(byte[] buf)
(package private)  void	readFully(byte[] buf, int off, int len)
(package private)  int	readLeInt()
(package private)  int	readLeShort()
(package private)  java.lang.String	readString(int length)
(package private)  void	seek(long newpos)
(package private)  void	setLength(long length)
long	skip(long amount)           This method skips the specified number of bytes in the stream.

 

Methods inherited from class java.io.InputStream

close, mark, markSupported, read, reset

 

Methods inherited from class java.lang.Object

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

 

Field Detail

raf

private final java.io.RandomAccessFile raf

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buffer

private final byte[] buffer

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bufferOffset

private long bufferOffset

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pos

private int pos

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end

private long end

Constructor Detail

ZipFile.PartialInputStream

public ZipFile.PartialInputStream(java.io.RandomAccessFile raf,
                                  int bufferSize)
                           throws java.io.IOException

Method Detail

setLength

void setLength(long length)

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fillBuffer

private void fillBuffer()
                 throws java.io.IOException

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available

public int available()

Description copied from class: java.io.InputStream

This method returns the number of bytes that can be read from this stream before a read can block. A return of 0 indicates that blocking might (or might not) occur on the very next read attempt.

This method always returns 0 in this class

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read

public int read()
         throws java.io.IOException

Description copied from class: java.io.InputStream

This method reads an unsigned byte from the input stream and returns it as an int in the range of 0-255. This method also will return -1 if the end of the stream has been reached.

This method will block until the byte can be read.

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read

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

Description copied from class: java.io.InputStream

This method read bytes from a stream and stores them into a caller supplied buffer. It starts storing the data at index off into the buffer and attempts to read len bytes. This method can return before reading the number of bytes requested. The actual number of bytes read is returned as an int. A -1 is returned to indicate the end of the stream.

This method will block until some data can be read.

This method operates by calling the single byte read() method in a loop until the desired number of bytes are read. The read loop stops short if the end of the stream is encountered or if an IOException is encountered on any read operation except the first. If the first attempt to read a bytes fails, the IOException is allowed to propagate upward. And subsequent IOException is caught and treated identically to an end of stream condition. Subclasses can (and should if possible) override this method to provide a more efficient implementation.

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skip

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

Description copied from class: java.io.InputStream

This method skips the specified number of bytes in the stream. It returns the actual number of bytes skipped, which may be less than the requested amount.

This method reads and discards bytes into a byte array until the specified number of bytes were skipped or until either the end of stream is reached or a read attempt returns a short count. Subclasses can override this metho to provide a more efficient implementation where one exists.

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seek

void seek(long newpos)
    throws java.io.IOException

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readFully

void readFully(byte[] buf)
         throws java.io.IOException

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readFully

void readFully(byte[] buf,
               int off,
               int len)
         throws java.io.IOException

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readLeShort

int readLeShort()
          throws java.io.IOException

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readLeInt

int readLeInt()
        throws java.io.IOException

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readString

java.lang.String readString(int length)
                      throws java.io.IOException

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