Examples of org.tmatesoft.svn.core.io.diff.SVNDeltaGenerator

org.tmatesoft.svn.core.io.diff.SVNDeltaGenerator
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 1.3 @author TMate Software Ltd. @since 1.2

            SVNErrorMessage err = SVNErrorMessage.create(SVNErrorCode.FS_PATH_SYNTAX, "Cannot replace a directory from within");
            SVNErrorManager.error(err, SVNLogType.FSFS);
        }


        if (myDeltaGenerator == null) {
            myDeltaGenerator = new SVNDeltaGenerator();
        }


        if (myDeltaCombiner == null) {
            myDeltaCombiner = new SVNDeltaCombiner();
        }

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                    InputStream sourceStream = null;
                    InputStream targetStream = null;
                    OutputStream tmpStream = null; 
                    
                    SVNDeltaCombiner deltaCombiner = getDeltaCombiner();
                    SVNDeltaGenerator deltaGenerator = getDeltaGenerator();
                    try {
                        if (compareRoot != null && comparePath != null) {
                            sourceStream = compareRoot.getFileStreamForPath(deltaCombiner, comparePath);
                        } else {
                            sourceStream = SVNFileUtil.DUMMY_IN;
                        }
                        targetStream = myRoot.getFileStreamForPath(deltaCombiner, canonicalPath);
                        tmpStream = SVNFileUtil.openFileForWriting(tmpFile);
                        final CountingStream countingStream = new CountingStream(tmpStream, 0);  
                        ISVNDeltaConsumer consumer = new ISVNDeltaConsumer() {
                            private boolean isHeaderWritten = false;
                            
                            public OutputStream textDeltaChunk(String path, SVNDiffWindow diffWindow) throws SVNException {
                                try {
                                    if (diffWindow != null) {
                                        diffWindow.writeTo(countingStream, !isHeaderWritten, false);
                                    } else {
                                        SVNDiffWindow.EMPTY.writeTo(countingStream, !isHeaderWritten, false);
                                    }
                                } catch (IOException ioe) {
                                    SVNErrorMessage err = SVNErrorMessage.create(SVNErrorCode.IO_ERROR, ioe.getLocalizedMessage());
                                    SVNErrorManager.error(err, ioe, SVNLogType.FSFS);
                                }


                                isHeaderWritten = true;
                                return SVNFileUtil.DUMMY_OUT;
                            }


                            public void applyTextDelta(String path, String baseChecksum) throws SVNException {
                            }
                            
                            public void textDeltaEnd(String path) throws SVNException {
                            }
                        };
                        
                        deltaGenerator.sendDelta(null, sourceStream, 0, targetStream, consumer, false);
                        txtLength = countingStream.getPosition();
                        
                        if (compareRoot != null) {
                            FSRevisionNode revNode = compareRoot.getRevisionNode(comparePath);
                            String hexDigest = revNode.getFileChecksum();

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        }
    }
    
    private SVNDeltaGenerator getDeltaGenerator() {
        if (myDeltaGenerator == null) {
            myDeltaGenerator = new SVNDeltaGenerator();
        }
        return myDeltaGenerator;
    }

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        isHeaderWritten = false;
        myRevNode = revNode;
        mySourceOffset = 0;
        myIsClosed = false;
        myTxnLock = txnLock;
        myDeltaGenerator = new SVNDeltaGenerator(SVN_DELTA_WINDOW_SIZE);
        myTextBuffer = new ByteArrayOutputStream();


        try {
            myDigest = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException nsae) {

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                editor.openDir(curPath, -1);
              }
          editor.openFile(filePath, -1);            
        }
        editor.applyTextDelta(filePath, null);
        SVNDeltaGenerator deltaGenerator = new SVNDeltaGenerator();
        String checksum = deltaGenerator.sendDelta(filePath, new ByteArrayInputStream(data), editor, true);
        editor.closeFile(filePath, checksum);
        editor.closeDir();
        editor.closeEdit();
    }

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            }
        }
        
        private SVNDeltaGenerator getDeltaGenerator() {
            if (myDeltaGenerator == null) {
                myDeltaGenerator = new SVNDeltaGenerator();
            }
            return myDeltaGenerator;
        }

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            for (int i = newPaths.size() - 1; i >= 0; i--) {
                newDirPath = newDirPath == null ? (String) newPaths.get(i) : SVNPathUtil.append(newDirPath, (String) newPaths.get(i));
                commitEditor.addDir(newDirPath, null, -1);
            }
            changed = newPaths.size() > 0;
            SVNDeltaGenerator deltaGenerator = new SVNDeltaGenerator();
            if (srcKind == SVNFileType.DIRECTORY) {
                changed |= importDir(deltaGenerator, path, newDirPath, useGlobalIgnores, 
                        ignoreUnknownNodeTypes, depth, commitEditor);
            } else if (srcKind == SVNFileType.FILE || srcKind == SVNFileType.SYMLINK) {
                if (!useGlobalIgnores || !DefaultSVNOptions.isIgnored(getOptions(), path.getName())) {

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                    SVNErrorManager.error(err, SVNLogType.WC);
                }
            }
            editor.applyTextDelta(path, checksum);
            if (myDeltaGenerator == null) {
                myDeltaGenerator = new SVNDeltaGenerator();
            }
            InputStream sourceIS = null;
            InputStream targetIS = null;
            OutputStream tmpBaseStream = null;
            File baseFile = dir.getBaseFile(name, false);

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            FSTransactionInfo txn = resource.getTxnInfo();
            Collection lockTokens = resource.getLockTokens();
            String userName = resource.getUserName();
            FSCommitter committer = getCommitter(fsfs, root, txn, lockTokens, userName);
            ISVNDeltaConsumer deltaConsumer = getDeltaConsumer(root, committer, fsfs, userName, lockTokens);
            SVNDeltaGenerator deltaGenerator = new SVNDeltaGenerator();
            InputStream inputStream = null;
            try {
                inputStream = getRequestInputStream();
                byte[] buffer = new byte[2048];
                int readCount = -1;
                while ((readCount = inputStream.read(buffer)) != -1) {
                    if (readCount == 0) {
                        continue;
                    }
                    if (deltaReader != null) {
                        deltaReader.nextWindow(buffer, 0, readCount, path, deltaConsumer);
                    } else {
                        deltaGenerator.sendDelta(path, buffer, readCount, deltaConsumer);
                    }
                }
            } catch (IOException ioe) {
                error = new DAVException("An error occurred while reading the request body.", HttpServletResponse.SC_BAD_REQUEST, 0);
            } catch (SVNException svne) {

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