Example usage for org.apache.commons.jrcs.diff Revision getDelta

Introduction

In this page you can find the example usage for org.apache.commons.jrcs.diff Revision getDelta.

Prototype

public Delta getDelta(int i) 

Source Link

Document

Retrieves a delta from this revision by position.

Usage

From source file:com.ecyrd.jspwiki.filters.SpamFilter.java

/**
 *  Creates a simple text string describing the added content.
 *
 *  @param context/*  w w  w .j av  a 2s .c  om*/
 *  @param newText
 *  @return Empty string, if there is no change.
 */
private static Change getChange(WikiContext context, String newText) {
    WikiPage page = context.getPage();
    StringBuffer change = new StringBuffer();
    WikiEngine engine = context.getEngine();
    // Get current page version

    Change ch = new Change();

    try {
        String oldText = engine.getPureText(page.getName(), WikiProvider.LATEST_VERSION);

        String[] first = Diff.stringToArray(oldText);
        String[] second = Diff.stringToArray(newText);
        Revision rev = Diff.diff(first, second, new MyersDiff());

        if (rev == null || rev.size() == 0) {
            return ch;
        }

        for (int i = 0; i < rev.size(); i++) {
            Delta d = rev.getDelta(i);

            if (d instanceof AddDelta) {
                d.getRevised().toString(change, "", "\r\n");
                ch.m_adds++;
            } else if (d instanceof ChangeDelta) {
                d.getRevised().toString(change, "", "\r\n");
                ch.m_adds++;
            } else if (d instanceof DeleteDelta) {
                ch.m_removals++;
            }
        }
    } catch (DifferentiationFailedException e) {
        log.error("Diff failed", e);
    }

    //
    //  Don't forget to include the change note, too
    //
    String changeNote = (String) page.getAttribute(WikiPage.CHANGENOTE);

    if (changeNote != null) {
        change.append("\r\n");
        change.append(changeNote);
    }

    //
    //  And author as well
    //

    if (page.getAuthor() != null) {
        change.append("\r\n" + page.getAuthor());
    }

    ch.m_change = change.toString();
    return ch;
}

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From source file:com.qumasoft.guitools.compare.CompareFilesForGUI.java

private void deduceRowTypes(Revision apacheRev, CompareLineInfo[] fileA, CompareLineInfo[] fileB)
        throws QVCSOperationException {
    // First get all the deltas...
    Delta[] deltas = new Delta[apacheRev.size()];
    for (int i = 0; i < apacheRev.size(); i++) {
        deltas[i] = apacheRev.getDelta(i);
    }/* w  w w  . j  a  v a  2  s . co  m*/

    fileARowTypeArray = new byte[fileA.length];
    fileBRowTypeArray = new byte[fileB.length];

    fileADeltaForRowArray = new Delta[fileA.length];
    fileBDeltaForRowArray = new Delta[fileB.length];

    // Set all the rows to default to NORMAL.
    for (int i = 0; i < fileA.length; i++) {
        fileARowTypeArray[i] = ContentRow.ROWTYPE_NORMAL;
    }
    for (int i = 0; i < fileB.length; i++) {
        fileBRowTypeArray[i] = ContentRow.ROWTYPE_NORMAL;
    }
    for (Delta delta : deltas) {
        byte rowType;
        if (delta instanceof AddDelta) {
            rowType = ContentRow.ROWTYPE_INSERT;
            // We need to set the row type and delta here for fileA because the
            // for loop doesn't traverse any rows on fileA.
            if (delta.getOriginal().anchor() > 0) {
                fileARowTypeArray[delta.getOriginal().anchor() - 1] = ContentRow.ROWTYPE_NORMAL;
                fileADeltaForRowArray[delta.getOriginal().anchor() - 1] = delta;
            }
        } else if (delta instanceof ChangeDelta) {
            rowType = ContentRow.ROWTYPE_REPLACE;
        } else if (delta instanceof DeleteDelta) {
            rowType = ContentRow.ROWTYPE_DELETE;
            // We need to set the row type and delta here for fileB because the
            // for loop doesn't traverse any rows on fileB.
            if (delta.getRevised().anchor() > 0) {
                fileBRowTypeArray[delta.getRevised().anchor() - 1] = ContentRow.ROWTYPE_NORMAL;
                fileBDeltaForRowArray[delta.getRevised().anchor() - 1] = delta;
            }
        } else {
            throw new QVCSOperationException("Unknown delta type.");
        }
        @SuppressWarnings("unchecked")
        int firstA = delta.getOriginal().first();
        int lastA = delta.getOriginal().last();
        for (int j = firstA; j <= lastA; j++) {
            fileARowTypeArray[j] = rowType;
            fileADeltaForRowArray[j] = delta;
        }
        int firstB = delta.getRevised().first();
        int lastB = delta.getRevised().last();
        for (int j = firstB; j <= lastB; j++) {
            fileBRowTypeArray[j] = rowType;
            fileBDeltaForRowArray[j] = delta;
        }
    }
}

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From source file:com.qumasoft.guitools.compare.ContentRow.java

private void deduceCharacterAnnotations(Revision differences, Byte[] sBytes) {
    // First get all the deltas...
    Delta[] deltas = new Delta[differences.size()];
    for (int i = 0; i < differences.size(); i++) {
        deltas[i] = differences.getDelta(i);
    }/*from   ww w.j  a va  2  s. com*/
    fileACharacterTypeArray = new byte[sBytes.length];
    // Set all the rows to default to NORMAL.
    for (int i = 0; i < sBytes.length; i++) {
        fileACharacterTypeArray[i] = ContentRow.ROWTYPE_NORMAL;
    }
    for (Delta characterDelta : deltas) {
        byte rType;
        if (characterDelta instanceof AddDelta) {
            rType = ContentRow.ROWTYPE_INSERT;
            rowHadAnnotations = true;
        } else if (characterDelta instanceof ChangeDelta) {
            rType = ContentRow.ROWTYPE_REPLACE;
            rowHadAnnotations = true;
        } else if (characterDelta instanceof DeleteDelta) {
            rType = ContentRow.ROWTYPE_DELETE;
            rowHadAnnotations = true;
        } else {
            continue; // this is goofy... and should never happen. We'll ignore the problem.
        }
        @SuppressWarnings("unchecked")
        int firstA = characterDelta.getOriginal().first();
        int lastA = characterDelta.getOriginal().last();
        for (int j = firstA; j <= lastA; j++) {
            fileACharacterTypeArray[j] = rType;
        }
    }
}

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From source file:com.qumasoft.qvcslib.CompareFilesWithApacheDiff.java

protected void writeEditScript(Revision apacheRevision, CompareLineInfo[] fileA, CompareLineInfo[] fileB)
        throws QVCSOperationException {
    DataOutputStream outStream = null;
    try {/*from  w w  w.  ja  va  2  s  .  co m*/
        outStream = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(outFile)));

        // Write the header
        CompareFilesEditHeader editHeader = new CompareFilesEditHeader();
        editHeader.setBaseFileSize(new Common32Long((int) inFileA.length()));
        editHeader.setTimeOfTarget(new CommonTime());
        editHeader.write(outStream);

        int count = apacheRevision.size();
        for (int index = 0; index < count; index++) {
            Delta delta = apacheRevision.getDelta(index);
            formatEditScript(delta, outStream, fileA);
        }
    } catch (IOException e) {
        throw new QVCSOperationException("IO Exception in writeEditScript() " + e.getLocalizedMessage());
    } finally {
        if (outStream != null) {
            try {
                outStream.close();
            } catch (IOException ex) {
                Logger.getLogger(CompareFilesWithApacheDiff.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }
}

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From source file:org.jmeld.diff.MyersDiff.java

private JMRevision buildRevision(Revision revision, Object[] orig, Object[] rev) {
    JMRevision result;/*from  w  ww . j  a  v a2  s. c o  m*/
    Delta delta;
    Chunk original;
    Chunk revised;

    if (orig == null) {
        throw new IllegalArgumentException("original sequence is null");
    }

    if (rev == null) {
        throw new IllegalArgumentException("revised sequence is null");
    }

    result = new JMRevision(orig, rev);
    for (int i = 0; i < revision.size(); i++) {
        delta = revision.getDelta(i);
        original = delta.getOriginal();
        revised = delta.getRevised();

        result.add(new JMDelta(new JMChunk(original.anchor(), original.size()),
                new JMChunk(revised.anchor(), revised.size())));
    }

    return result;
}

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