/*
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2003 The Apache Software Foundation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgement may appear in the software itself,
 *    if and wherever such third-party acknowledgements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 * 5. Products derived from this software may not be called "Apache"
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 *
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.commons.jrcs.diff;

import java.util.List;

/**
 * Holds a delete-delta between to revisions of a text.
 *
 * @version $Id: DeleteDelta.java,v 1.5 2003/10/13 08:00:24 rdonkin Exp $
 * @author <a href="mailto:juanco@suigeneris.org">Juanco Anez</a>
 * @see Delta
 * @see Diff
 * @see Chunk
 */
public class DeleteDelta
    extends Delta
{

    DeleteDelta()
    {
        super();
    }

    public DeleteDelta(Chunk orig)
    {
        init(orig, null);
    }

    public void verify(List target)
        throws PatchFailedException
    {
        if (!original.verify(target))
        {
            throw new PatchFailedException();
        }
    }

    public void applyTo(List target)
    {
        original.applyDelete(target);
    }

    public void toString(StringBuffer s)
    {
        s.append(original.rangeString());
        s.append("d");
        s.append(revised.rcsto());
        s.append(Diff.NL);
        original.toString(s, "< ", Diff.NL);
    }

    public void toRCSString(StringBuffer s, String EOL)
    {
        s.append("d");
        s.append(original.rcsfrom());
        s.append(" ");
        s.append(original.size());
        s.append(EOL);
    }

    public void accept(RevisionVisitor visitor)
    {
        visitor.visit(this);
    }
}
