001: /*
002: * $Id: jdfix.java,v 1.8 2003/11/07 20:16:23 dfs Exp $
003: *
004: * ====================================================================
005: * The Apache Software License, Version 1.1
006: *
007: * Copyright (c) 2000 The Apache Software Foundation. All rights
008: * reserved.
009: *
010: * Redistribution and use in source and binary forms, with or without
011: * modification, are permitted provided that the following conditions
012: * are met:
013: *
014: * 1. Redistributions of source code must retain the above copyright
015: * notice, this list of conditions and the following disclaimer.
016: *
017: * 2. Redistributions in binary form must reproduce the above copyright
018: * notice, this list of conditions and the following disclaimer in
019: * the documentation and/or other materials provided with the
020: * distribution.
021: *
022: * 3. The end-user documentation included with the redistribution,
023: * if any, must include the following acknowledgment:
024: * "This product includes software developed by the
025: * Apache Software Foundation (http://www.apache.org/)."
026: * Alternately, this acknowledgment may appear in the software itself,
027: * if and wherever such third-party acknowledgments normally appear.
028: *
029: * 4. The names "Apache" and "Apache Software Foundation", "Jakarta-Oro"
030: * must not be used to endorse or promote products derived from this
031: * software without prior written permission. For written
032: * permission, please contact apache@apache.org.
033: *
034: * 5. Products derived from this software may not be called "Apache"
035: * or "Jakarta-Oro", nor may "Apache" or "Jakarta-Oro" appear in their
036: * name, without prior written permission of the Apache Software Foundation.
037: *
038: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
039: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
040: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
041: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
042: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
043: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
044: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
045: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
046: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
047: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
048: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
049: * SUCH DAMAGE.
050: * ====================================================================
051: *
052: * This software consists of voluntary contributions made by many
053: * individuals on behalf of the Apache Software Foundation. For more
054: * information on the Apache Software Foundation, please see
055: * <http://www.apache.org/>.
056: */
057:
058: package examples;
059:
060: import java.io.*;
061:
062: import org.apache.oro.text.perl.*;
063:
064: /**
065: * This is an example program demonstrating how to use the PerlTools
066: * match and substitute methods.
067: *
068: * @version @version@
069: */
070: public final class jdfix {
071:
072: /**
073: * This program performs the exact same function as this Perl script.
074: * Notice that the Java program is only so much longer because of all
075: * of the I/O exception handling and InputStream creation. The core
076: * while loop is EXACTLY the same length as the while loop in the Perl
077: * script. The number of substitutions performed is printed to standard
078: * output as additional information. Note, this is not an efficient way
079: * to do this job; it is better to first read the entire file into a
080: * character array.
081: * <p>
082: * This is a simple program that takes a javadoc generated HTML file as
083: * input and produces as output the same HTML file, except with a white
084: * background color for the body.
085: * <p>
086: * <pre>
087: * #!/usr/bin/perl
088: *
089: * $#ARGV >= 1 || die "Usage: jdfix input output\n";
090: *
091: * open(INPUT, $ARGV[0]) || warn "Couldn't open $ARGV[0]\n";
092: * open(OUTPUT, ">$ARGV[1]") || warn "Couldn't open $ARGV[1]\n";
093: *
094: * while(<INPUT>){
095: * s/<body>/<body bgcolor="#ffffff">/;
096: * print OUTPUT;
097: * }
098: *
099: * close(INPUT);
100: * close(OUTPUT);
101: * </pre>
102: */
103: public static final void main(String args[]) {
104: String line;
105: BufferedReader input = null;
106: PrintWriter output = null;
107: Perl5Util perl;
108: StringBuffer result = new StringBuffer();
109: int numSubs = 0;
110:
111: if (args.length < 2) {
112: System.err.println("Usage: jdfix input output");
113: return;
114: }
115:
116: try {
117: input = new BufferedReader(new FileReader(args[0]));
118: } catch (IOException e) {
119: System.err.println("Error opening input file: " + args[0]);
120: e.printStackTrace();
121: return;
122: }
123:
124: try {
125: output = new PrintWriter(new FileWriter(args[1]));
126: } catch (IOException e) {
127: System.err.println("Error opening output file: " + args[1]);
128: e.printStackTrace();
129: return;
130: }
131:
132: perl = new Perl5Util();
133:
134: try {
135: while ((line = input.readLine()) != null) {
136: numSubs += perl.substitute(result,
137: "s/<body>/<body bgcolor=\"#ffffff\">/", line);
138: result.append('\n');
139: }
140: output.print(result.toString());
141: System.out.println("Substitutions made: " + numSubs);
142: } catch (IOException e) {
143: System.err.println("Error reading from input: " + args[1]);
144: e.printStackTrace();
145: return;
146: } finally {
147: try {
148: input.close();
149: output.close();
150: } catch (IOException e) {
151: System.err.println("Error closing files.");
152: e.printStackTrace();
153: return;
154: }
155: }
156: }
157:
158: }
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