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1 import java.io.*;
2 import java.util.*;
3
4
24
25
32 public class TextCutter
33 {
35 boolean inmatch;
36 String  start, stop, subst;
37 TextCutter pred;
38
39 TextCutter() { }
41
43 private TextCutter( TextCutter predecessor, String start, String stop, String subst) {
45 if ( stop.length() == 0 ) { System.err.println( "Emtpy stop delimiter string is illegal."); System.exit( 1 ); }
47 this.pred = predecessor; this.start = start; this.stop = stop; this.subst = subst;
48 }
49
50 private TextCutter( TextCutter predecessor, String start, String subst) {
52 if ( start.length() == 0 ) { System.err.println( "Emtpy search string is illegal."); System.exit( 1 ); }
54 this.pred = predecessor; this.start = start; this.stop = null; this.subst = subst;
55 }
56
57
58 private void transform( String inFileName, String outFileName, boolean append) {
60 BufferedReader in = null;
62 BufferedWriter out = null;
63 String line = null;
64
65 try {
66 if ( inFileName == null ) throw new IOException( "No input file specified.");
67
68 if ( (new File( inFileName )).getCanonicalPath().equals( (new File( outFileName )).getCanonicalPath() ) )
69 throw new IOException( "Target file is same as source.");
70
71 out = new BufferedWriter( new FileWriter( outFileName, append ) );
72 in = new BufferedReader( new FileReader( inFileName ) );
73
74 while ( (line = in.readLine()) != null ) {
75 line = cutLine( line + "\n" );
76 out.write( line );
77 }
79 return;
80 }
81 catch ( IOException e ) { System.err.println( e.getMessage() ); }
82 finally {
83 try { if ( out != null ) out.close(); } catch ( IOException e ) { System.err.println( e.getMessage()); }
84 try { if ( in != null ) in.close(); } catch ( IOException e ) { System.err.println( e.getMessage()); }
85 }
86 System.exit( 2 );
87 }
88
89 private String cutLine( String line) {
91
93
95 if ( pred != null ) line = pred.cutLine( line );
96
97
99 if ( start == null ) return line;
100
101 int p = 0, q = 0;
102 while ( p >= 0 ) {
103 if ( ! this.inmatch ) {
104 p = line.indexOf( start, p );
105 if ( p >= 0 ) {
106 line = line.substring( 0, p ) + subst + line.substring( p + start.length() );
107 p += subst.length();
108 if ( stop != null ) this.inmatch = true;
109 }
110 }
111 else {
112 q = p;
113 p = line.indexOf( stop, p );
114 if ( p >= 0 ) {
115 line = line.substring( 0, q ) + line.substring( p + stop.length() );
116 p = q;
117 this.inmatch = false;
118 }
119 else {
120 line = line.substring( 0, q);
121 }
122 }
123 }
124 return line;
125 }
126
127
128 public void start( String args ) {
130 String [] argList = new String [] {""};
132 try {
133 Vector tokens = new Vector();
134 StreamTokenizer st = new StreamTokenizer( new StringReader( args));
135 st.resetSyntax(); st.whitespaceChars(0, ' ');
137 st.wordChars('\u0021', '\u00FF');
138 st.quoteChar('\'');
139 st.quoteChar('"');
140 st.eolIsSignificant(false);
141
142 while( st.nextToken() != StreamTokenizer.TT_EOF) {
143 switch( st.ttype) {
144 case '"':
145 case '\'':
146 case StreamTokenizer.TT_WORD: tokens.add( st.sval);
147 break;
148 }
149 }
150 argList = new String [ tokens.size() ];
151 for( int i = tokens.size(); i >= 0; i-- ) argList[i-1] = (String ) tokens.elementAt(i-1);
152
153 }
154 catch ( IOException e ) { System.err.println( e.getMessage()); System.exit(9); }
155 start( argList );
156 }
157
158
159 public void start( String [] args ) {
161
163 if ( args.length < 1 ) { showUsage(); System.exit( 0 ); }
164
165 int l = 0;
166 int u = 0;
167 TextCutter tc = new TextCutter();
168 String inFileName = null;
169
170 try {
171 while ( l < args.length ) {
172 u = 0;
173 if (args[l].equals("-h")) { showUsage(); System.exit( 0 ); u = 1;}
174 if (args[l].equals("-f")) { inFileName = args[l+1]; u = 2; }
175 if (args[l].equals("-o")) { tc.transform( inFileName, args[l+1], false); u = 2; tc = new TextCutter(); }
176 if (args[l].equals("-a")) { tc.transform( inFileName, args[l+1], true); u = 2; tc = new TextCutter(); }
177 if (args[l].equals("-s")) {
178 tc = new TextCutter( tc, args[l+1], args[l+2], args[l+3] );
179 u = 4;
180 }
181 if (args[l].equals("-r")) {
182 tc = new TextCutter( tc, args[l+1], args[l+2] );
183 u = 3;
184 }
185
186 if ( u < 1 ) {
187 System.err.println("Unknown option '" + args[l] + "'.\n");
188 showUsage();
189 System.exit( 1 );
190 }
191 l += u;
192 }
193 }
194 catch ( ArrayIndexOutOfBoundsException aob ) {
195 System.err.println( "Missing argument. Try '-h' for help.");
196 System.exit( 1 );
197 }
198 }
199
200
201 public static void main( String [] args ) {
203
205 new TextCutter().start( args );
206
207 }
208
209
210 private void showUsage() {
212 System.out.println("\nDo text replacements in files.");
214
215 System.out.println("java TextCutter <commands>");
216 System.out.println("where <commands> is sequence of");
217 System.out.println(" -f FILE : read FILE");
218 System.out.println(" -o FILE : process read text and output to FILE, then reset '-s' and '-r'");
219 System.out.println(" -a FILE : process read text and append to FILE, then reset '-s' and '-r'");
220 System.out.println(" -s STRING1 STRING2 STRING3 : substitute regions delimited by STRING1 and STRING2 by STRING3");
221 System.out.println(" -r STRING1 STRING2 : replace every STRING1 by STRING2");
222 System.out.println("");
223 }
224
225 }
226 |
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