001: /*
002: * ====================================================================
003: *
004: * The Apache Software License, Version 1.1
005: *
006: * Copyright (c) 1999-2003 The Apache Software Foundation.
007: * All rights reserved.
008: *
009: * Redistribution and use in source and binary forms, with or without
010: * modification, are permitted provided that the following conditions
011: * are met:
012: *
013: * 1. Redistributions of source code must retain the above copyright
014: * notice, this list of conditions and the following disclaimer.
015: *
016: * 2. Redistributions in binary form must reproduce the above copyright
017: * notice, this list of conditions and the following disclaimer in
018: * the documentation and/or other materials provided with the
019: * distribution.
020: *
021: * 3. The end-user documentation included with the redistribution, if
022: * any, must include the following acknowledgement:
023: * "This product includes software developed by the
024: * Apache Software Foundation (http://www.apache.org/)."
025: * Alternately, this acknowledgement may appear in the software itself,
026: * if and wherever such third-party acknowledgements normally appear.
027: *
028: * 4. The names "The Jakarta Project", "Commons", and "Apache Software
029: * Foundation" must not be used to endorse or promote products derived
030: * from this software without prior written permission. For written
031: * permission, please contact apache@apache.org.
032: *
033: * 5. Products derived from this software may not be called "Apache"
034: * nor may "Apache" appear in their names without prior written
035: * permission of the Apache Software Foundation.
036: *
037: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
038: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
039: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
040: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
041: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
042: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
043: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
044: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
045: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
046: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
047: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
048: * SUCH DAMAGE.
049: * ====================================================================
050: *
051: * This software consists of voluntary contributions made by many
052: * individuals on behalf of the Apache Software Foundation. For more
053: * information on the Apache Software Foundation, please see
054: * <http://www.apache.org/>.
055: *
056: */
057:
058: package org.apache.commons.jrcs.diff;
059:
060: import java.util.List;
061:
062: /**
063: * Holds an change-delta between to revisions of a text.
064: *
065: * @version $Id: ChangeDelta.java 7756 2006-04-13 12:25:49Z ian@caret.cam.ac.uk $
066: * @author <a href="mailto:juanco@suigeneris.org">Juanco Anez</a>
067: * @see Delta
068: * @see Diff
069: * @see Chunk
070: */
071: public class ChangeDelta extends Delta {
072:
073: ChangeDelta() {
074: super ();
075: }
076:
077: public ChangeDelta(Chunk orig, Chunk rev) {
078: init(orig, rev);
079: }
080:
081: public void verify(List target) throws PatchFailedException {
082: if (!original.verify(target)) {
083: throw new PatchFailedException();
084: }
085: if (original.first() > target.size()) {
086: throw new PatchFailedException(
087: "original.first() > target.size()");
088: }
089: }
090:
091: public void applyTo(List target) {
092: original.applyDelete(target);
093: revised.applyAdd(original.first(), target);
094: }
095:
096: public void toString(StringBuffer s) {
097: original.rangeString(s);
098: s.append("c");
099: revised.rangeString(s);
100: s.append(Diff.NL);
101: original.toString(s, "< ", "\n");
102: s.append("---");
103: s.append(Diff.NL);
104: revised.toString(s, "> ", "\n");
105: }
106:
107: public void toRCSString(StringBuffer s, String EOL) {
108: s.append("d");
109: s.append(original.rcsfrom());
110: s.append(" ");
111: s.append(original.size());
112: s.append(EOL);
113: s.append("a");
114: s.append(original.rcsto());
115: s.append(" ");
116: s.append(revised.size());
117: s.append(EOL);
118: revised.toString(s, "", EOL);
119: }
120:
121: public void accept(RevisionVisitor visitor) {
122: visitor.visit(this);
123: }
124: }
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