org.jaudiotagger.audio.asf.io
Class AsfExtHeaderModifier

java.lang.Object
  org.jaudiotagger.audio.asf.io.AsfExtHeaderModifier

All Implemented Interfaces:

ChunkModifier

public class AsfExtHeaderModifier
extends java.lang.Object
implements ChunkModifier

This modifier manipulates an ASF header extension object.

Author:

Christian Laireiter

Field Summary

private java.util.List<ChunkModifier>

modifierList List of modifiers which are to be applied to contained chunks.

Constructor Summary

AsfExtHeaderModifier(java.util.List<ChunkModifier> modifiers)
Creates an instance.

Method Summary

private void	copyChunk(GUID guid, java.io.InputStream source, java.io.OutputStream destination) Simply copies a chunk from source to destination. The method assumes, that the GUID has already been read and will write the provided one to the destination. The chunk length however will be read and used to determine the amount of bytes to copy.
boolean	isApplicable(GUID guid) Determines, whether the modifier handles chunks identified by given guid.
ModificationResult	modify(GUID guid, java.io.InputStream source, java.io.OutputStream destination) Writes a modified copy of the chunk into the destination..

Methods inherited from class java.lang.Object

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

Field Detail

modifierList

private final java.util.List<ChunkModifier> modifierList

List of modifiers which are to be applied to contained chunks.

Constructor Detail

AsfExtHeaderModifier

public AsfExtHeaderModifier(java.util.List<ChunkModifier> modifiers)

Creates an instance.

Parameters:

modifiers - modifiers to apply.

Method Detail

copyChunk

private void copyChunk(GUID guid,
                       java.io.InputStream source,
                       java.io.OutputStream destination)
                throws java.io.IOException

Simply copies a chunk from source to destination.
The method assumes, that the GUID has already been read and will write the provided one to the destination.
The chunk length however will be read and used to determine the amount of bytes to copy.

Parameters:

guid - GUID of the current CHUNK.

source - source of an ASF chunk, which is to be located at the chunk length field.

destination - the destination to copy the chunk to.

Throws:

java.io.IOException - on I/O errors.

isApplicable

public boolean isApplicable(GUID guid)

Determines, whether the modifier handles chunks identified by given guid.

Specified by:

isApplicable in interface ChunkModifier

Parameters:

guid - GUID to test.

Returns:

true, if this modifier can be used to modify the chunk.

modify

public ModificationResult modify(GUID guid,
                                 java.io.InputStream source,
                                 java.io.OutputStream destination)
                          throws java.io.IOException

Writes a modified copy of the chunk into the destination..

Specified by:

modify in interface ChunkModifier

Parameters:

guid - GUID of the chunk to modify.

source - a stream providing the chunk, starting at the chunks length field.

destination - destination for the modified chunk.

Returns:

the differences between source and destination.

Throws:

java.io.IOException - on I/O errors.