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

Introduction

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

Prototype

public void accept(RevisionVisitor visitor) 

Source Link

Document

Accepts a visitor.

Usage

From source file:com.ecyrd.jspwiki.diff.TraditionalDiffProvider.java

/**
 * Makes a diff using the BMSI utility package. We use our own diff printer,
 * which makes things easier.//w  w  w.  j a v a2s . c  om
 * 
 * @param ctx The WikiContext in which the diff should be made.
 * @param p1 The first string
 * @param p2 The second string.
 * 
 * @return Full HTML diff.
 */
public String makeDiffHtml(WikiContext ctx, String p1, String p2) {
    String diffResult = "";

    try {
        String[] first = Diff.stringToArray(TextUtil.replaceEntities(p1));
        String[] second = Diff.stringToArray(TextUtil.replaceEntities(p2));
        Revision rev = Diff.diff(first, second, new MyersDiff());

        if (rev == null || rev.size() == 0) {
            // No difference

            return "";
        }

        StringBuffer ret = new StringBuffer(rev.size() * 20); // Guessing how big it will become...

        ret.append("<table class=\"diff\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n");
        rev.accept(new RevisionPrint(ctx, ret));
        ret.append("</table>\n");

        return ret.toString();
    } catch (DifferentiationFailedException e) {
        diffResult = "makeDiff failed with DifferentiationFailedException";
        log.error(diffResult, e);
    }

    return diffResult;
}

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From source file:cn.vlabs.duckling.vwb.service.diff.impl.TraditionalDiffProvider.java

/**
 * Makes a diff using the BMSI utility package. We use our own diff printer,
 * which makes things easier.//from ww  w . j  av  a 2  s .c o m
 */
public String makeDiffHtml(VWBContext ctx, String p1, String p2) {
    String diffResult = "";

    try {
        String[] first = Diff.stringToArray(TextUtil.replaceEntities(p1));
        String[] second = Diff.stringToArray(TextUtil.replaceEntities(p2));
        Revision rev = Diff.diff(first, second, new MyersDiff());

        if (rev == null || rev.size() == 0) {
            // No difference

            return "";
        }

        StringBuffer ret = new StringBuffer(rev.size() * 20); // Guessing
        // how big
        // it will
        // become...

        ret.append("<table class=\"diff\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n");
        rev.accept(new RevisionPrint(ctx, ret));
        ret.append("</table>\n");

        return ret.toString();
    } catch (DifferentiationFailedException e) {
        diffResult = "makeDiff failed with DifferentiationFailedException";
        log.error(diffResult, e);
    }

    return diffResult;
}

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From source file:com.ecyrd.jspwiki.diff.ContextualDiffProvider.java

/**
 * Do a colored diff of the two regions. This. is. serious. fun. ;-)
 *
 * @see com.ecyrd.jspwiki.diff.DiffProvider#makeDiffHtml(WikiContext, String, String)
 * /*from   w w  w  . j a  va2 s . co m*/
 * {@inheritDoc}
 */
public synchronized String makeDiffHtml(WikiContext ctx, String wikiOld, String wikiNew) {
    //
    // Sequencing handles lineterminator to <br /> and every-other consequtive space to a &nbsp;
    //
    String[] alpha = sequence(TextUtil.replaceEntities(wikiOld));
    String[] beta = sequence(TextUtil.replaceEntities(wikiNew));

    Revision rev = null;
    try {
        rev = Diff.diff(alpha, beta, new MyersDiff());
    } catch (DifferentiationFailedException dfe) {
        log.error("Diff generation failed", dfe);
        return "Error while creating version diff.";
    }

    int revSize = rev.size();

    StringBuffer sb = new StringBuffer();

    sb.append(m_diffStart);

    //
    // The MyersDiff is a bit dumb by converting a single line multi-word diff into a series
    // of Changes. The ChangeMerger pulls them together again...
    //
    ChangeMerger cm = new ChangeMerger(sb, alpha, revSize);

    rev.accept(cm);

    cm.shutdown();

    sb.append(m_diffEnd);

    return sb.toString();
}

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From source file:org.apache.wiki.diff.FlowchartDiffProvider.java

private String createTextDiff(WikiContext ctx, String p1, String p2, StringBuffer buffy)
        throws DifferentiationFailedException {
    String[] first = Diff.stringToArray(TextUtil.replaceEntities(p1));
    String[] second = Diff.stringToArray(TextUtil.replaceEntities(p2));
    Revision rev = Diff.diff(first, second, new MyersDiff());

    if (rev == null || rev.size() == 0) {
        // No difference

        return "";
    }//from ww  w.  j  a v a  2s .  c  o m

    // first version is empty page. Diff is called when article is created
    if (p1.equals("")) {
        return "";
    }

    // how big
    // it will
    // become...

    buffy.append("<table class=\"diff\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n");
    rev.accept(new RevisionPrint(ctx, buffy));
    buffy.append("</table>\n");

    return buffy.toString();
}

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