001/*
002 * ====================================================================
003 * 
004 * The Apache Software License, Version 1.1
005 * 
006 * Copyright (c) 1999-2003 The Apache Software Foundation. All rights reserved.
007 * 
008 * Redistribution and use in source and binary forms, with or without
009 * modification, are permitted provided that the following conditions are met:
010 * 
011 * 1. Redistributions of source code must retain the above copyright notice,
012 * this list of conditions and the following disclaimer.
013 * 
014 * 2. Redistributions in binary form must reproduce the above copyright notice,
015 * this list of conditions and the following disclaimer in the documentation
016 * and/or other materials provided with the distribution.
017 * 
018 * 3. The end-user documentation included with the redistribution, if any, must
019 * include the following acknowledgement: "This product includes software
020 * developed by the Apache Software Foundation (http://www.apache.org/)."
021 * Alternately, this acknowledgement may appear in the software itself, if and
022 * wherever such third-party acknowledgements normally appear.
023 * 
024 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
025 * Foundation" must not be used to endorse or promote products derived from this
026 * software without prior written permission. For written permission, please
027 * contact apache@apache.org.
028 * 
029 * 5. Products derived from this software may not be called "Apache" nor may
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031 * Software Foundation.
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033 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
034 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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043 * ====================================================================
044 * 
045 * This software consists of voluntary contributions made by many individuals on
046 * behalf of the Apache Software Foundation. For more information on the Apache
047 * Software Foundation, please see <http://www.apache.org/>.
048 * 
049 */
050
051package org.apache.wicket.util.diff;
052
053import java.util.List;
054
055/**
056 * Holds an add-delta between to revisions of a text.
057 * 
058 * @version $Id: AddDelta.java,v 1.1 2006/03/12 00:24:21 juanca Exp $
059 * @author <a href="mailto:juanco@suigeneris.org">Juanco Anez</a>
060 * @see Delta
061 * @see Diff
062 * @see Chunk
063 */
064public class AddDelta extends Delta
065{
066        /**
067         * Construct.
068         */
069        AddDelta()
070        {
071        }
072
073        /**
074         * Construct.
075         * 
076         * @param origpos
077         * @param rev
078         */
079        public AddDelta(final int origpos, final Chunk rev)
080        {
081                init(new Chunk(origpos, 0), rev);
082        }
083
084        @Override
085        public void verify(final List<Object> target) throws PatchFailedException
086        {
087                if (original.first() > target.size())
088                {
089                        throw new PatchFailedException("original.first() > target.size()");
090                }
091        }
092
093        @Override
094        public void applyTo(final List<Object> target)
095        {
096                revised.applyAdd(original.first(), target);
097        }
098
099        @Override
100        public void toString(final StringBuilder s)
101        {
102                s.append(original.anchor());
103                s.append("a");
104                s.append(revised.rangeString());
105                s.append(Diff.NL);
106                revised.toString(s, "> ", Diff.NL);
107        }
108
109        @Override
110        public void toRCSString(final StringBuilder s, final String EOL)
111        {
112                s.append("a");
113                s.append(original.anchor());
114                s.append(" ");
115                s.append(revised.size());
116                s.append(EOL);
117                revised.toString(s, "", EOL);
118        }
119
120        @Override
121        public void accept(final RevisionVisitor visitor)
122        {
123                visitor.visit(this);
124        }
125}