Source Code Cross Referenced for PathPattern.java in  » Scripting » jruby » jregex » util » io » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » jruby » jregex.util.io 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Copyright (c) 2001, Sergey A. Samokhodkin
003:         * All rights reserved.
004:         * 
005:         * Redistribution and use in source and binary forms, with or without modification, 
006:         * are permitted provided that the following conditions are met:
007:         * 
008:         * - Redistributions of source code must retain the above copyright notice, 
009:         * this list of conditions and the following disclaimer. 
010:         * - Redistributions in binary form 
011:         * must reproduce the above copyright notice, this list of conditions and the following 
012:         * disclaimer in the documentation and/or other materials provided with the distribution.
013:         * - Neither the name of jregex nor the names of its contributors may be used 
014:         * to endorse or promote products derived from this software without specific prior 
015:         * written permission. 
016:         * 
017:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
018:         * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
019:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
020:         * IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
021:         * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
022:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
023:         * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
024:         * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY 
025:         * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
026:         * 
027:         * @version 1.2_01
028:         */package jregex.util.io;
029:
030:        import jregex.*;
031:        import java.io.FilenameFilter;
032:        import java.io.File;
033:        import java.util.Enumeration;
034:        import java.util.Vector;
035:
036:        /**
037:         * A special-purpose subclass of the Pattern class.
038:         * Has two different applications:
039:         * <li> to search files by their paths using special patterns;
040:         * <li> to match path strings
041:         * Syntax:
042:         * <li><code><b>?</b></code> - any character but path separator
043:         * <li><code><b>*</b></code> - any string no including path separators
044:         * <li><code><b>**</b></code> - any path<br>
045:         * <br>
046:         * Usage:<pre>
047:         * PathPattern pp=new PathPattern("jregex/**"); //all files and directories
048:         *                                              //under the jregex directory
049:         * Enumeration files=pp.enumerateFiles();
050:         * Matcher m=pp.matcher();
051:         * while(files.hasMoreElements()){
052:         *    File f=(File)files.nextElement();
053:         *    m.setTarget(f.getPath());
054:         *    if(!m.matches()) System.out.println("Error in jregex.io.PathPattern");
055:         * }
056:         * </pre>
057:         * @see    jregex.WildcardPattern
058:         */
059:
060:        public class PathPattern extends Pattern {
061:            private static final int RESERVED = 1;
062:            private static int GRP_NO = RESERVED + 1;
063:            private static final int ANY_G = GRP_NO++;
064:            private static final int FS_G = GRP_NO++;
065:            private static final int STAR_G = GRP_NO++;
066:            private static final int QMARK_G = GRP_NO++;
067:            private static final int SPCHAR_G = GRP_NO++;
068:            private static final int NONROOT_G = GRP_NO++;
069:
070:            private static final String grp(int gno, String s) {
071:                return "({" + gno + "}" + s + ")";
072:            }
073:
074:            private static final String fsChars = "/\\" + File.separator;
075:            private static final String fsClass = "[" + fsChars + "]";
076:            private static final String nfsClass = "[^" + fsChars + "]";
077:            private static final String fName = nfsClass + "+";
078:            private static final Pattern fs = new Pattern(fsClass);
079:            private static final Pattern spCharPattern = new Pattern(grp(
080:                    NONROOT_G, "^(?!" + fsClass + ")")
081:                    + "|"
082:                    + grp(ANY_G, fsClass + "?\\*\\*" + fsClass + "?")
083:                    + "|"
084:                    + grp(FS_G, fsClass)
085:                    + "|"
086:                    + grp(STAR_G, "\\*")
087:                    + "|"
088:                    + grp(QMARK_G, "\\?")
089:                    + "|"
090:                    + grp(SPCHAR_G, "[.()\\{\\}+|^$\\[\\]\\\\]"));
091:
092:            private static final Replacer spCharProcessor = new Replacer(
093:                    spCharPattern, new Substitution() {
094:                        public void appendSubstitution(MatchResult mr,
095:                                TextBuffer dest) {
096:                            //System.out.println("spCharProcessor.appendSubstitution(): "+((Matcher)mr).groupv());
097:                            if (mr.isCaptured(FS_G)) {
098:                                dest.append(fsClass);
099:                            } else if (mr.isCaptured(ANY_G)) {
100:                                dest.append("(?:(?:");
101:                                dest.append(fsClass);
102:                                dest.append("|^)((?:");
103:                                dest.append(fName);
104:                                dest.append("(?:");
105:                                dest.append(fsClass);
106:                                dest.append(fName);
107:                                dest.append(")*)?))?");
108:                                dest.append("(?:");
109:                                dest.append(fsClass);
110:                                dest.append("|$)");
111:                            } else if (mr.isCaptured(STAR_G)) {
112:                                dest.append("(");
113:                                dest.append(nfsClass);
114:                                dest.append("*)");
115:                            } else if (mr.isCaptured(QMARK_G)) {
116:                                dest.append("(");
117:                                dest.append(nfsClass);
118:                                dest.append(")");
119:                            } else if (mr.isCaptured(SPCHAR_G)) {
120:                                dest.append("\\");
121:                                mr.getGroup(SPCHAR_G, dest);
122:                            } else if (mr.isCaptured(NONROOT_G)) {
123:                                dest.append("(?:\\.");
124:                                dest.append(fsClass);
125:                                dest.append(")?");
126:                            }
127:                        }
128:                    });
129:
130:            private String str;
131:            private String root;
132:            private File rootf;
133:            private PathElementMask queue, last;
134:
135:            public PathPattern(String ptn) {
136:                this (ptn, DEFAULT);
137:            }
138:
139:            public PathPattern(String ptn, boolean icase) {
140:                this (ptn, icase ? DEFAULT | IGNORE_CASE : DEFAULT);
141:            }
142:
143:            public PathPattern(String path, int flags) {
144:                this (null, path, flags);
145:            }
146:
147:            public PathPattern(File dir, String path, boolean icase) {
148:                this (null, path, icase ? DEFAULT | IGNORE_CASE : DEFAULT);
149:            }
150:
151:            public PathPattern(File dir, String path, int flags) {
152:                if (path == null || path.length() == 0)
153:                    throw new IllegalArgumentException("empty path not allowed");
154:
155:                str = path;
156:                RETokenizer tok = new RETokenizer(fs.matcher(path), true);
157:                String s = tok.nextToken();
158:                if (s.equals("")) {
159:                    if (dir != null)
160:                        rootf = dir;
161:                    else
162:                        root = "/";
163:                } else {
164:                    if (dir != null)
165:                        rootf = dir;
166:                    else
167:                        root = ".";
168:                    addElement(newMask(s, flags, tok.hasMore()));
169:                }
170:                while (tok.hasMore()) {
171:                    s = tok.nextToken();
172:                    boolean hasMore = tok.hasMore();
173:                    if (s.equals("")) {
174:                        if (hasMore)
175:                            throw new IllegalArgumentException(
176:                                    "\"//\" not allowed");
177:                        else
178:                            break;
179:                    }
180:                    addElement(newMask(s, flags, hasMore));
181:                }
182:                compile(spCharProcessor.replace(path), flags);
183:                //System.out.println(spCharProcessor.replace(path));
184:            }
185:
186:            private void addElement(PathElementMask mask) {
187:                if (queue == null) {
188:                    queue = last = mask;
189:                } else {
190:                    last = (last.next = mask);
191:                }
192:            }
193:
194:            public Enumeration enumerateFiles() {
195:                PathElementEnumerator fe = queue.newEnumerator();
196:                fe.setDir(rootf != null ? rootf : new File(root));
197:                return fe;
198:            }
199:
200:            public File[] files() {
201:                Enumeration e = enumerateFiles();
202:                Vector v = new Vector();
203:                while (e.hasMoreElements())
204:                    v.addElement(e.nextElement());
205:                File[] files = new File[v.size()];
206:                v.copyInto(files);
207:                return files;
208:            }
209:
210:            /**
211:             * @deprecated Is meaningless with regard to variable paths (since v.1.2)
212:             */
213:            public String[] names() {
214:                return null;
215:            }
216:
217:            /**
218:             * @deprecated Is meaningless with regard to  variable paths (since v.1.2) 
219:             */
220:            public File directory() {
221:                return null;
222:            }
223:
224:            private static PathElementMask newMask(String s, int flags,
225:                    boolean dirsOnly) {
226:                if (s == null || s.length() == 0)
227:                    throw new IllegalArgumentException(
228:                            "Error: empty path element not allowed");
229:                if (s.indexOf('*') < 0 && s.indexOf('?') < 0) {
230:                    //if((flags&IGNORE_CASE)==0) return PathElementMask.fixedMask(s,dirsOnly);
231:                    //just a dirty trick, 
232:                    //on windows this could be a disk name ("D:"),
233:                    //and so won't be listed, so the RegularMask won't help
234:                    if ((flags & IGNORE_CASE) == 0 || s.indexOf(':') >= 0)
235:                        return PathElementMask.fixedMask(s, dirsOnly);
236:                    else
237:                        return PathElementMask.regularMask(s, flags, dirsOnly);
238:                } else if (s.equals("*"))
239:                    return PathElementMask.anyFile(dirsOnly);
240:                else if (s.equals("**"))
241:                    return PathElementMask.anyPath(dirsOnly);
242:                else
243:                    return PathElementMask.regularMask(s, flags, dirsOnly);
244:            }
245:
246:            public String toString() {
247:                return str;
248:            }
249:
250:            //public static void main(String[] args)throws Exception{
251:            //   PathPattern path=new PathPattern(args.length>0? args[0]: "/**/*tmp*/**",true);
252:            //   //PathPattern path=new PathPattern(args.length>0? args[0]: "*/*",true);
253:            //   //PathPattern path=new PathPattern(args.length>0? args[0]: "/**/*abc*",true);
254:            //   Enumeration e=path.enumerateFiles();
255:            //   int c=0;
256:            //   int err=0;
257:            //   Matcher m=path.matcher();
258:            //   long t0=System.currentTimeMillis();
259:            //   //while(e.hasMoreElements()){
260:            //   //while(e.hasMoreElements() && c<30){
261:            //   while(e.hasMoreElements() && err<10){
262:            //      File f=(File)e.nextElement();
263:            //      if(!m.matches(f.getPath())){
264:            //         System.out.println("error with file: "+f);
265:            //         err++;
266:            //      }
267:            //      else{
268:            //         //System.out.println("file matches: "+m.groupv());
269:            //      }
270:            //      c++;
271:            //   }
272:            //   long t1=System.currentTimeMillis();
273:            //   System.out.println("found "+err+" errors in "+c+" files, time="+(t1-t0));
274:            //}
275:        }
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