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

void
applyTextDelta(File baseFile, File targetFile, boolean computeCheksum)
Starts processing deltas given a base file and a one to write resultant target bytes to.
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.
OutputStream
textDeltaChunk(SVNDiffWindow window)
Receives a next diff window to be applied.
String
textDeltaEnd()
Performs delta processing finalizing steps.

Constructor Details

SVNDeltaProcessor

public SVNDeltaProcessor()
Creates a processor.

Method Details

applyTextDelta

public void applyTextDelta(File baseFile,
                           File targetFile,
                           boolean computeCheksum)
            throws SVNException
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 -

applyTextDelta

public void applyTextDelta(InputStream base,
                           OutputStream target,
                           boolean computeCheksum)
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

textDeltaChunk

public OutputStream textDeltaChunk(SVNDiffWindow window)
            throws SVNException
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 © 2004-2006 TMate Software Ltd. All Rights Reserved.