org.tmatesoft.svn.core.io.diff

Class SVNDeltaProcessor

public class SVNDeltaProcessor extends Object

The SVNDeltaProcessor is used to get a full text of a file in series applying diff windows being passed to a processor.

Version: 1.1.1

Author: TMate Software Ltd.

Constructor Summary
SVNDeltaProcessor()
Creates a processor.
Method Summary
voidapplyTextDelta(InputStream base, OutputStream target, boolean computeCheksum)
Starts processing deltas given a base file stream and an output stream to write resultant target bytes to.
voidapplyTextDelta(File baseFile, File targetFile, boolean computeCheksum)
Starts processing deltas given a base file and a one to write resultant target bytes to.
OutputStreamtextDeltaChunk(SVNDiffWindow window)
Receives a next diff window to be applied.
StringtextDeltaEnd()
Performs delta processing finalizing steps.

Constructor Detail

SVNDeltaProcessor

public SVNDeltaProcessor()
Creates a processor.

Method Detail

applyTextDelta

public void applyTextDelta(InputStream base, OutputStream target, boolean computeCheksum)
Starts processing deltas given a base file stream and an output stream to write resultant target bytes to.

If a target full text is a newly added file (text deltas would be vs. empty), then source bytes are not needed and base may be passed as null.

If computeChecksum is true, then an MD5 checksum will be calculated for target bytes. The calculated checksum is returned by textDeltaEnd.

Parameters: base an input stream to take base file contents from target an output stream to write the resultant target contents to computeCheksum true to calculate checksum

applyTextDelta

public void applyTextDelta(File baseFile, File targetFile, boolean computeCheksum)
Starts processing deltas given a base file and a one to write resultant target bytes to.

If a target full text is a newly added file (text deltas would be vs. empty), then source bytes are not needed and baseFile may be passed as null.

If a file represented by targetFile does not exist yet, first tries to create an empty file.

If computeChecksum is true, then an MD5 checksum will be calculated for target bytes. The calculated checksum is returned by textDeltaEnd.

Parameters: baseFile a base file to read base file contents from targetFile a destination file where resultant target bytes will be written computeCheksum true to calculate checksum

Throws: SVNException

textDeltaChunk

public OutputStream textDeltaChunk(SVNDiffWindow window)
Receives a next diff window to be applied. The return value is a dummy stream (left for backward compatibility) since new data should come within a diff window.

Parameters: window a diff window

Returns: a dummy output stream

Throws: SVNException

textDeltaEnd

public String textDeltaEnd()
Performs delta processing finalizing steps. Applies the last window left (if any) and finalizes checksum calculation (if a checksum was required).

Returns: a string representing a hex form of the calculated MD5 checksum or null if checksum calculation was not required

Copyright © 2004-2007 TMate Software Ltd. All Rights Reserved.