| /* gnu.classpath.tools.doclets.PackageMatcher |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| package gnu.classpath.tools.doclets; |
| |
| import java.util.Iterator; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.SortedSet; |
| import java.util.TreeSet; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import com.sun.javadoc.PackageDoc; |
| |
| /** |
| * Filters a set of packages according to a set of wildcards. |
| */ |
| public class PackageMatcher |
| { |
| private Set patterns = new HashSet(); |
| |
| /** |
| * Add a wildcard to be matched. Wildcards can contain asterisk |
| * characters which match zero or more characters. |
| * |
| * @throw InvalidPackageWildcardException if the wildcard cannot |
| * match any valid package name. |
| */ |
| public void addWildcard(String wildcard) |
| throws InvalidPackageWildcardException |
| { |
| final int STATE_ID_START = 0; |
| final int STATE_ID = 1; |
| |
| int state = STATE_ID_START; |
| |
| char[] wildcardChars = wildcard.toCharArray(); |
| StringBuffer regexString = new StringBuffer(); |
| |
| for (int i=0; i<wildcardChars.length; ++i) { |
| char c = wildcardChars[i]; |
| switch (state) { |
| case STATE_ID_START: |
| if ('*' == c) { |
| regexString.append(".*"); |
| } |
| else if (Character.isJavaIdentifierStart(c)) { |
| regexString.append(c); |
| } |
| else { |
| throw new InvalidPackageWildcardException(wildcard); |
| } |
| state = STATE_ID; |
| break; |
| |
| case STATE_ID: |
| if ('.' == c) { |
| regexString.append("\\."); |
| state = STATE_ID_START; |
| } |
| else if ('*' == c) { |
| regexString.append(".*"); |
| } |
| else if (Character.isJavaIdentifierPart(c)) { |
| regexString.append(c); |
| } |
| else { |
| throw new InvalidPackageWildcardException(wildcard); |
| } |
| } |
| } |
| if (STATE_ID_START == state) { |
| throw new InvalidPackageWildcardException(wildcard); |
| } |
| |
| patterns.add(Pattern.compile(regexString.toString())); |
| } |
| |
| /** |
| * Return a sorted, filtered set of packages. A package from the |
| * array given will be put into the output list if it matches one |
| * or more of the wildcards added to this PackageMatcher before. |
| */ |
| public SortedSet filter(PackageDoc[] packageDocs) |
| { |
| SortedSet result = new TreeSet(); |
| for (int i=0; i<packageDocs.length; ++i) { |
| if (match(packageDocs[i])) { |
| result.add(packageDocs[i]); |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Return true when the given PackageDoc matches one or more of |
| * the wildcard added to this PackageMatcher before. |
| */ |
| public boolean match(PackageDoc packageDoc) |
| { |
| Iterator it = patterns.iterator(); |
| while (it.hasNext()) { |
| Pattern pattern = (Pattern)it.next(); |
| Matcher matcher = pattern.matcher(packageDoc.name()); |
| if (matcher.matches()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public String toString() |
| { |
| return "PackageMatcher{patterns=" + patterns + "}"; |
| } |
| } |