com.itextpdf.io.source

Class IndependentRandomAccessSource

java.lang.Object

com.itextpdf.io.source.IndependentRandomAccessSource

All Implemented Interfaces:

IRandomAccessSource

public class IndependentRandomAccessSource
extends Object
implements IRandomAccessSource

A RandomAccessSource that is wraps another RandomAccessSource but does not propagate close(). This is useful when passing a RandomAccessSource to a method that would normally close the source.

Constructor Summary

Constructors

Constructor and Description
IndependentRandomAccessSource(IRandomAccessSource source) Constructs a new IndependentRandomAccessSource object

Method Summary

Modifier and Type	Method and Description
void	close() Does nothing - the underlying source is not closed
int	get(long position) Gets a byte at the specified position
int	get(long position, byte[] bytes, int off, int len) Read an array of bytes of specified length from the specified position of source to the buffer applying the offset.
long	length() Gets the length of the source

Methods inherited from class java.lang.Object

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

Constructor Detail

IndependentRandomAccessSource

public IndependentRandomAccessSource(IRandomAccessSource source)

Constructs a new IndependentRandomAccessSource object

Parameters:

source - the source

Method Detail

get

public int get(long position)
        throws IOException

Gets a byte at the specified position

Specified by:

get in interface IRandomAccessSource

Parameters:

position - byte position

Returns:

the byte, or -1 if EOF is reached

Throws:

IOException - in case of any reading error.

get

public int get(long position,
               byte[] bytes,
               int off,
               int len)
        throws IOException

Read an array of bytes of specified length from the specified position of source to the buffer applying the offset. If the number of bytes requested cannot be read, all the possible bytes will be read to the buffer, and the number of actually read bytes will be returned.

Specified by:

get in interface IRandomAccessSource

Parameters:

position - the position in the RandomAccessSource to read from

bytes - output buffer

off - offset into the output buffer where results will be placed

len - the number of bytes to read

Returns:

the number of bytes actually read, or -1 if the file is at EOF

Throws:

IOException - in case of any I/O error.

length

public long length()

Gets the length of the source

Specified by:

length in interface IRandomAccessSource

Returns:

the length of this source

close

public void close()
           throws IOException

Does nothing - the underlying source is not closed

Specified by:

close in interface IRandomAccessSource

Throws:

IOException - in case of any reading error.