org.tmatesoft.svn.core.io.diff

Class SVNDeltaGenerator

public class SVNDeltaGenerator extends Object

The SVNDeltaGenerator is intended for generating diff windows of fixed size having a target version of a file against a source one. File contents are provided as two streams - source and target ones, or just target if delta is generated against empty contents.

The generator uses the V-Delta algorithm for generating full contents delta (vs. empty) and the X-Delta algorithm for generating delta as a difference between target and non-empty source streams.

Version: 1.1.1

Author: TMate Software Ltd.

Constructor Summary
SVNDeltaGenerator()
Creates a generator that will produce diff windows of 100Kbytes contents length.
SVNDeltaGenerator(int maximumDiffWindowSize)
Creates a generator that will produce diff windows of a specified contents length.
Method Summary
StringsendDelta(String path, InputStream target, ISVNDeltaConsumer consumer, boolean computeChecksum)
Generates a series of diff windows of fixed size comparing target bytes (from target stream) against an empty file and sends produced windows to the provided consumer.
StringsendDelta(String path, InputStream source, long sourceOffset, InputStream target, ISVNDeltaConsumer consumer, boolean computeChecksum)
Generates a series of diff windows of fixed size comparing target bytes (read from target stream) against source bytes (read from source stream), and sends produced windows to the provided consumer.
voidsendDelta(String path, byte[] target, int targetLength, ISVNDeltaConsumer consumer)
voidsendDelta(String path, byte[] source, int sourceLength, long sourceOffset, byte[] target, int targetLength, ISVNDeltaConsumer consumer)

Constructor Detail

SVNDeltaGenerator

public SVNDeltaGenerator()
Creates a generator that will produce diff windows of 100Kbytes contents length. That is, after applying of such a window you get 100Kbytes of file contents.

See Also: SVNDeltaGenerator

SVNDeltaGenerator

public SVNDeltaGenerator(int maximumDiffWindowSize)
Creates a generator that will produce diff windows of a specified contents length.

Parameters: maximumDiffWindowSize a maximum size of a file contents chunk that a single applied diff window would produce

Method Detail

sendDelta

public String sendDelta(String path, InputStream target, ISVNDeltaConsumer consumer, boolean computeChecksum)
Generates a series of diff windows of fixed size comparing target bytes (from target stream) against an empty file and sends produced windows to the provided consumer. consumer's textDeltaChunk() method is called to receive and process generated windows. Now new data comes within a window, so the output stream is either ignored (if it's null) or immediately closed (if it's not null).

If computeChecksum is true, the return value will be a strig containing a hex representation of the MD5 digest computed for the target contents.

Parameters: path a file repository path target an input stream to read target bytes from consumer a diff windows consumer computeChecksum true to compute a checksum

Returns: if computeChecksum is true, a string representing a hex form of the MD5 checksum computed for the target contents; otherwise null

Throws: SVNException

sendDelta

public String sendDelta(String path, InputStream source, long sourceOffset, InputStream target, ISVNDeltaConsumer consumer, boolean computeChecksum)
Generates a series of diff windows of fixed size comparing target bytes (read from target stream) against source bytes (read from source stream), and sends produced windows to the provided consumer. consumer's textDeltaChunk() method is called to receive and process generated windows. Now new data comes within a window, so the output stream is either ignored (if it's null) or immediately closed (if it's not null).

If computeChecksum is true, the return value will be a strig containing a hex representation of the MD5 digest computed for the target contents.

Parameters: path a file repository path source an input stream to read source bytes from sourceOffset an offset of the source view in the given source stream target an input stream to read target bytes from consumer a diff windows consumer computeChecksum true to compute a checksum

Returns: if computeChecksum is true, a string representing a hex form of the MD5 checksum computed for the target contents; otherwise null

Throws: SVNException

sendDelta

public void sendDelta(String path, byte[] target, int targetLength, ISVNDeltaConsumer consumer)

sendDelta

public void sendDelta(String path, byte[] source, int sourceLength, long sourceOffset, byte[] target, int targetLength, ISVNDeltaConsumer consumer)
Copyright © 2004-2007 TMate Software Ltd. All Rights Reserved.