Source Code Cross Referenced for CVSIgnore.java in  » Source-Control » jcvsweb » com » ice » cvsc » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Source Control » jcvsweb » com.ice.cvsc 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         ** Java cvs client library package.
003:         ** Copyright (c) 1997-2002 by Timothy Gerard Endres
004:         ** 
005:         ** This program is free software.
006:         ** 
007:         ** You may redistribute it and/or modify it under the terms of the GNU
008:         ** Library General Public License (LGPL) as published by the Free Software
009:         ** Foundation.
010:         **
011:         ** Version 2 of the license should be included with this distribution in
012:         ** the file LICENSE.txt, as well as License.html. If the license is not
013:         ** included	with this distribution, you may find a copy at the FSF web
014:         ** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the Free
015:         ** Software Foundation at 59 Temple Place - Suite 330, Boston, MA 02111 USA.
016:         **
017:         ** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
018:         ** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
019:         ** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
020:         ** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
021:         ** REDISTRIBUTION OF THIS SOFTWARE. 
022:         ** 
023:         */
024:
025:        package com.ice.cvsc;
026:
027:        /**
028:         * The CVSIgnore class implements the concept of a '.cvsignore' file.
029:         * This is used by CVSProject's to handling CVS's concept of files that
030:         * should be ignored during processing.	Currently, we only need this for
031:         * the 'import' function, since in all other cases we have a list of
032:         * entries to work from. In other words, 'import' is the only function
033:         * we implement that scans directories, and thus cares about ignoring
034:         * certain files.
035:         *
036:         * @version $Revision: 2.4 $
037:         * @author Timothy Gerard Endres, <a href="mailto:time@ice.com">time@ice.com</a>.
038:         * @see CVSProject
039:         *
040:         */
041:
042:        import java.lang.*;
043:        import java.io.*;
044:        import java.util.*;
045:
046:        public class CVSIgnore extends Object {
047:            static public final String RCS_ID = "$Id: CVSIgnore.java,v 2.4 2003/07/27 01:08:32 time Exp $";
048:            static public final String RCS_REV = "$Revision: 2.4 $";
049:
050:            static private final String DEFAULT_IGNORE_SPEC = "RCSLOG RCS SCCS CVS cvslog.*"
051:                    + "tags TAGS *~ #* ,*"
052:                    + "*.old *.bak *.orig *.rej .del-*"
053:                    + "*.a *.o *.elc *.ln core" + "*.zip *.tar *.gz *.z *.Z";
054:
055:            private Vector specs;
056:
057:            /**
058:             * Constructs a new CVSIgnore object.
059:             */
060:            public CVSIgnore() {
061:                super ();
062:                this .specs = null;
063:                this .setIgnoreSpec(DEFAULT_IGNORE_SPEC);
064:            }
065:
066:            /**
067:             * Constructs a new CVSIgnore object, setting the
068:             * ignore's list to that specified by the parameter.
069:             *
070:             * @param default_spec The default ignore specs.
071:             */
072:            public CVSIgnore(String default_spec) {
073:                super ();
074:                this .specs = null;
075:                this .setIgnoreSpec(default_spec);
076:            }
077:
078:            public int size() {
079:                return this .specs.size();
080:            }
081:
082:            /**
083:             * Adds the cvsignore specifications to the current list
084:             * of ignored files.
085:             * 
086:             * @param spec The string listing the specs to add.
087:             */
088:            public void addIgnoreSpec(String spec) {
089:                if (spec == null)
090:                    return;
091:
092:                String toke;
093:                int i, count;
094:
095:                if (this .specs == null) {
096:                    this .specs = new Vector();
097:                }
098:
099:                StringTokenizer toker = new StringTokenizer(spec);
100:
101:                count = toker.countTokens();
102:
103:                for (i = 0; i < count; ++i) {
104:                    try {
105:                        toke = toker.nextToken();
106:                    } catch (NoSuchElementException ex) {
107:                        break;
108:                    }
109:
110:                    if (toke.equals("!")) {
111:                        this .specs = new Vector();
112:                    } else {
113:                        this .specs.addElement(toke);
114:                    }
115:                }
116:            }
117:
118:            /**
119:             * Adds the cvsignore specifications from the file
120:             * provided to the current list of ignored files.
121:             * 
122:             * @param ignoreFile The file containing the ignore specs.
123:             */
124:            public void addIgnoreFile(File ignoreFile) {
125:                if (ignoreFile == null)
126:                    return;
127:
128:                String line;
129:                boolean ok = true;
130:                BufferedReader in = null;
131:
132:                if (this .specs == null) {
133:                    this .specs = new Vector();
134:                }
135:
136:                try {
137:                    in = new BufferedReader(new FileReader(ignoreFile));
138:                } catch (IOException ex) {
139:                    in = null;
140:                    ok = false;
141:                }
142:
143:                for (; ok;) {
144:                    try {
145:                        line = in.readLine();
146:                    } catch (IOException ex) {
147:                        line = null;
148:                    }
149:
150:                    if (line == null)
151:                        break;
152:
153:                    this .addIgnoreSpec(line);
154:                }
155:
156:                if (in != null) {
157:                    try {
158:                        in.close();
159:                    } catch (IOException ex) {
160:                    }
161:                }
162:            }
163:
164:            /**
165:             * Replaces all current ignore specs with those passed in.
166:             * 
167:             * @param spec The string listing the specs to replace with.
168:             */
169:            public void setIgnoreSpec(String spec) {
170:                if (this .specs != null) {
171:                    this .specs.removeAllElements();
172:                }
173:
174:                this .addIgnoreSpec(spec);
175:            }
176:
177:            /**
178:             * Determines if a file is to be ignored.
179:             * 
180:             * @param name The name of the file to check.
181:             * @return If the file is to be ignored, true, else false.
182:             */
183:            public boolean isFileToBeIgnored(String name) {
184:                int i;
185:
186:                for (i = 0; i < this .specs.size(); ++i) {
187:                    String spec = (String) this .specs.elementAt(i);
188:                    if (fileMatchesExpr(name, spec)) {
189:                        return true;
190:                    }
191:                }
192:
193:                return false;
194:            }
195:
196:            /**
197:             * Determines if a filename matches an expression.
198:             * 
199:             * @param fileName The name of the file to check.
200:             * @param matchExpr The expression to check against.
201:             * @return If the file name matches the expression, true, else false.
202:             */
203:            private boolean fileMatchesExpr(String fileName, String matchExpr) {
204:                return this .matchExprRecursor(fileName, matchExpr, 0, 0);
205:            }
206:
207:            /**
208:             * An internal routine to implement expression matching.
209:             * This routine is based on a self-recursive algorithm.
210:             * 
211:             * @param string The string to be compared.
212:             * @param pattern The expression to compare <em>string</em> to.
213:             * @param sIdx The index of where we are in <em>string</em>.
214:             * @param pIdx The index of where we are in <em>pattern</em>.
215:             * @return True if <em>string</em> matched pattern, else false.
216:             */
217:            private boolean matchExprRecursor(String string, String pattern,
218:                    int sIdx, int pIdx) {
219:                int pLen = pattern.length();
220:                int sLen = string.length();
221:
222:                for (;;) {
223:
224:                    if (pIdx >= pLen) {
225:                        if (sIdx >= sLen)
226:                            return true;
227:                        else
228:                            return false;
229:                    }
230:
231:                    if (sIdx >= sLen && pattern.charAt(pIdx) != '*') {
232:                        return false;
233:                    }
234:
235:                    // Check for a '*' as the next pattern char.
236:                    // This is handled by a recursive call for
237:                    // each postfix of the name.
238:                    if (pattern.charAt(pIdx) == '*') {
239:                        if (++pIdx >= pLen)
240:                            return true;
241:
242:                        for (;;) {
243:                            if (this .matchExprRecursor(string, pattern, sIdx,
244:                                    pIdx))
245:                                return true;
246:
247:                            if (sIdx >= sLen)
248:                                return false;
249:
250:                            ++sIdx;
251:                        }
252:                    }
253:
254:                    // Check for '?' as the next pattern char.
255:                    // This matches the current character.
256:                    if (pattern.charAt(pIdx) == '?') {
257:                        ++pIdx;
258:                        ++sIdx;
259:                        continue;
260:                    }
261:
262:                    // Check for '[' as the next pattern char.
263:                    // This is a list of acceptable characters,
264:                    // which can include character ranges.
265:                    if (pattern.charAt(pIdx) == '[') {
266:                        for (++pIdx;; ++pIdx) {
267:                            if (pIdx >= pLen || pattern.charAt(pIdx) == ']')
268:                                return false;
269:
270:                            if (pattern.charAt(pIdx) == string.charAt(sIdx))
271:                                break;
272:
273:                            if (pIdx < (pLen - 1)
274:                                    && pattern.charAt(pIdx + 1) == '-') {
275:                                if (pIdx >= (pLen - 2))
276:                                    return false;
277:
278:                                char chStr = string.charAt(sIdx);
279:                                char chPtn = pattern.charAt(pIdx);
280:                                char chPtn2 = pattern.charAt(pIdx + 2);
281:
282:                                if ((chPtn <= chStr) && (chPtn2 >= chStr))
283:                                    break;
284:
285:                                if ((chPtn >= chStr) && (chPtn2 <= chStr))
286:                                    break;
287:
288:                                pIdx += 2;
289:                            }
290:                        }
291:
292:                        for (; pattern.charAt(pIdx) != ']'; ++pIdx) {
293:                            if (pIdx >= pLen) {
294:                                --pIdx;
295:                                break;
296:                            }
297:                        }
298:
299:                        ++pIdx;
300:                        ++sIdx;
301:                        continue;
302:                    }
303:
304:                    // Check for backslash escapes
305:                    // We just skip over them to match the next char.
306:                    if (pattern.charAt(pIdx) == '\\') {
307:                        if (++pIdx >= pLen)
308:                            return false;
309:                    }
310:
311:                    if (pIdx < pLen && sIdx < sLen)
312:                        if (pattern.charAt(pIdx) != string.charAt(sIdx))
313:                            return false;
314:
315:                    ++pIdx;
316:                    ++sIdx;
317:                }
318:            }
319:
320:            public void dumpIgnoreList(String message) {
321:                if (message != null)
322:                    CVSLog.logMsg(message);
323:
324:                for (int i = 0; i < this .specs.size(); ++i) {
325:                    String spec = (String) this .specs.elementAt(i);
326:
327:                    CVSLog.logMsg("Ignore[" + i + "] '" + spec + "'");
328:                }
329:            }
330:        }
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