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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ * of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * This program 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 of the License, or (at your option)
+ * any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.util;
+
+import java.io.File;
+
+/**
+ * This StringParser can create StringMatcher instances for regular expressions
+ * matching file names. The regular expressions can contain the following
+ * wildcards:
+ * '?' for a single regular file name character,
+ * '*' for any number of regular file name characters, and
+ * '**' for any number of regular file name characters or directory separator
+ * characters (always including '/').
+ *
+ * @author Eric Lafortune
+ */
+public class FileNameParser implements StringParser
+{
+ // Implementations for StringParser.
+
+ public StringMatcher parse(String regularExpression)
+ {
+ int index;
+ StringMatcher nextMatcher = new EmptyStringMatcher();
+
+ // Look for wildcards.
+ for (index = 0; index < regularExpression.length(); index++)
+ {
+ // Is there a '**' wildcard?
+ if (regularExpression.regionMatches(index, "**", 0, 2))
+ {
+ // Create a matcher for the wildcard and, recursively, for the
+ // remainder of the string.
+ nextMatcher =
+ new VariableStringMatcher(null,
+ null,
+ 0,
+ Integer.MAX_VALUE,
+ parse(regularExpression.substring(index + 2)));
+ break;
+ }
+
+ // Is there a '*' wildcard?
+ else if (regularExpression.charAt(index) == '*')
+ {
+ // Create a matcher for the wildcard and, recursively, for the
+ // remainder of the string.
+ nextMatcher =
+ new VariableStringMatcher(null,
+ new char[] { File.pathSeparatorChar, '/' },
+ 0,
+ Integer.MAX_VALUE,
+ parse(regularExpression.substring(index + 1)));
+ break;
+ }
+
+ // Is there a '?' wildcard?
+ else if (regularExpression.charAt(index) == '?')
+ {
+ // Create a matcher for the wildcard and, recursively, for the
+ // remainder of the string.
+ nextMatcher =
+ new VariableStringMatcher(null,
+ new char[] { File.pathSeparatorChar, '/' },
+ 1,
+ 1,
+ parse(regularExpression.substring(index + 1)));
+ break;
+ }
+ }
+
+ // Return a matcher for the fixed first part of the regular expression,
+ // if any, and the remainder.
+ return index != 0 ?
+ (StringMatcher)new FixedStringMatcher(regularExpression.substring(0, index), nextMatcher) :
+ (StringMatcher)nextMatcher;
+ }
+
+
+ /**
+ * A main method for testing file name matching.
+ */
+ public static void main(String[] args)
+ {
+ try
+ {
+ System.out.println("Regular expression ["+args[0]+"]");
+ FileNameParser parser = new FileNameParser();
+ StringMatcher matcher = parser.parse(args[0]);
+ for (int index = 1; index < args.length; index++)
+ {
+ String string = args[index];
+ System.out.print("String ["+string+"]");
+ System.out.println(" -> match = "+matcher.matches(args[index]));
+ }
+ }
+ catch (Exception ex)
+ {
+ ex.printStackTrace();
+ }
+ }
+}