1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 package proguard.util; 22 23 /** 24 * This StringMatcher tests whether strings end in a given extension, ignoring 25 * its case. 26 * 27 * @author Eric Lafortune 28 */ 29 public class ExtensionMatcher implements StringMatcher 30 { 31 private final String extension; 32 33 34 /** 35 * Creates a new StringMatcher. 36 * @param extension the extension against which strings will be matched. 37 */ ExtensionMatcher(String extension)38 public ExtensionMatcher(String extension) 39 { 40 this.extension = extension; 41 } 42 43 44 // Implementations for StringMatcher. 45 matches(String string)46 public boolean matches(String string) 47 { 48 return endsWithIgnoreCase(string, extension); 49 } 50 51 52 /** 53 * Returns whether the given string ends with the given suffix, ignoring its 54 * case. 55 */ endsWithIgnoreCase(String string, String suffix)56 private static boolean endsWithIgnoreCase(String string, String suffix) 57 { 58 int stringLength = string.length(); 59 int suffixLength = suffix.length(); 60 61 return string.regionMatches(true, stringLength - suffixLength, suffix, 0, suffixLength); 62 } 63 } 64