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.tools;
059:
060: import java.io.BufferedReader;
061: import java.io.FileReader;
062: import java.io.IOException;
063: import java.util.ArrayList;
064: import java.util.Date;
065: import java.util.List;
066:
067: import org.apache.commons.jrcs.diff.Diff;
068: import org.apache.commons.jrcs.diff.Revision;
069:
070: /**
071: * A program to compare two files.
072: * <p>JDiff produces the deltas between the two given files in Unix diff
073: * format.
074: * </p>
075: * <p>The program was written as a simple test of the
076: * {@linkplain org.apache.commons.jrcs.diff diff} package.
077: */
078: public class JDiff {
079:
080: static final String[] loadFile(String name) throws IOException {
081: BufferedReader data = new BufferedReader(new FileReader(name));
082: List lines = new ArrayList();
083: String s;
084: while ((s = data.readLine()) != null) {
085: lines.add(s);
086: }
087: return (String[]) lines.toArray(new String[lines.size()]);
088: }
089:
090: static final void usage(String name) {
091: System.err.println("Usage: " + name + " file1 file2");
092: }
093:
094: public static void main(String[] argv) throws Exception {
095: if (argv.length < 2) {
096: usage("JDiff");
097: } else {
098: Object[] orig = loadFile(argv[0]);
099: Object[] rev = loadFile(argv[1]);
100:
101: Diff df = new Diff(orig);
102: Revision r = df.diff(rev);
103:
104: System.err.println("------");
105: System.out.print(r.toString());
106: System.err.println("------" + new Date());
107:
108: try {
109: Object[] reco = r.patch(orig);
110: //String recos = Diff.arrayToString(reco);
111: if (!Diff.compare(rev, reco)) {
112: System.err.println("INTERNAL ERROR:"
113: + "files differ after patching!");
114: }
115: } catch (Throwable o) {
116: System.out.println("Patch failed");
117: }
118: }
119: }
120: }
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