org.eclipse.swt.internal.image

Class LEDataInputStream

java.lang.Object

java.io.InputStream

org.eclipse.swt.internal.image.LEDataInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

final class LEDataInputStream
extends java.io.InputStream

Structure Diagram

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	buf The byte array containing the bytes to read.
(package private) java.io.InputStream	in
protected int	pos The current position within the byte array buf.
(package private) int	position

Constructor Summary

Constructors

Constructor and Description
LEDataInputStream(java.io.InputStream input)
LEDataInputStream(java.io.InputStream input, int bufferSize)

Method Summary

Methods

Modifier and Type	Method and Description
int	available() Answers how many bytes are available for reading without blocking
void	close()
int	getPosition() Answer how many bytes were read.
int	read() Answer the next byte of the input stream.
int	read(byte[] b, int off, int len) Don't imitate the JDK behaviour of reading a random number of bytes when you can actually read them all.
private int	readData(byte[] buffer, int offset, int length) Reads at most length bytes from this LEDataInputStream and stores them in byte array buffer starting at offset.
int	readInt() Answer an integer comprised of the next four bytes of the input stream.
short	readShort() Answer a short comprised of the next two bytes of the input stream.
void	unread(byte[] b) Push back the entire content of the given buffer b.

Methods inherited from class java.io.InputStream

mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

position

int position

in

java.io.InputStream in

buf

protected byte[] buf

The byte array containing the bytes to read.

pos

protected int pos

The current position within the byte array buf. A value equal to buf.length indicates no bytes available. A value of 0 indicates the buffer is full.

Constructor Detail

LEDataInputStream

public LEDataInputStream(java.io.InputStream input)

LEDataInputStream

public LEDataInputStream(java.io.InputStream input,
                 int bufferSize)

Method Detail

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException

getPosition

public int getPosition()

Answer how many bytes were read.

available

public int available()
              throws java.io.IOException

Answers how many bytes are available for reading without blocking

Overrides:

available in class java.io.InputStream

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Answer the next byte of the input stream.

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

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

Don't imitate the JDK behaviour of reading a random number of bytes when you can actually read them all.

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

readData

private int readData(byte[] buffer,
           int offset,
           int length)
              throws java.io.IOException

Reads at most length bytes from this LEDataInputStream and stores them in byte array buffer starting at offset.

Answer the number of bytes actually read or -1 if no bytes were read and end of stream was encountered. This implementation reads bytes from the pushback buffer first, then the target stream if more bytes are required to satisfy count.

Parameters:

buffer - the byte array in which to store the read bytes.

offset - the offset in buffer to store the read bytes.

length - the maximum number of bytes to store in buffer.

Returns:

int the number of bytes actually read or -1 if end of stream.

Throws:

java.io.IOException - if an IOException occurs.

readInt

public int readInt()
            throws java.io.IOException

Answer an integer comprised of the next four bytes of the input stream.

Throws:

java.io.IOException

readShort

public short readShort()
                throws java.io.IOException

Answer a short comprised of the next two bytes of the input stream.

Throws:

java.io.IOException

unread

public void unread(byte[] b)
            throws java.io.IOException

Push back the entire content of the given buffer b.

The bytes are pushed so that they would be read back b[0], b[1], etc. If the push back buffer cannot handle the bytes copied from b, an IOException will be thrown and no byte will be pushed back.

Parameters:

b - the byte array containing bytes to push back into the stream

Throws:

java.io.IOException - if the pushback buffer is too small