1 /* 2 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.tools.javac.util; 27 28 import java.util.regex.Pattern; 29 import javax.lang.model.SourceVersion; 30 31 /**Utilities to convert an import-like string to a regexp. 32 * 33 * <p><b>This is NOT part of any supported API. 34 * If you write code that depends on this, you do so at your own risk. 35 * This code and its internal interfaces are subject to change or 36 * deletion without notice.</b> 37 */ 38 public class MatchingUtils { 39 40 private static final String allMatchesString = ".*"; 41 private static final Pattern allMatches = Pattern.compile(allMatchesString); 42 43 /** 44 * Return true if the argument string is a valid import-style 45 * string specifying claimed annotations; return false otherwise. 46 */ isValidImportString(String s)47 public static boolean isValidImportString(String s) { 48 if (s.equals("*")) 49 return true; 50 51 boolean valid = true; 52 String t = s; 53 int index = t.indexOf('*'); 54 55 if (index != -1) { 56 // '*' must be last character... 57 if (index == t.length() -1) { 58 // ... any and preceding character must be '.' 59 if ( index-1 >= 0 ) { 60 valid = t.charAt(index-1) == '.'; 61 // Strip off ".*$" for identifier checks 62 t = t.substring(0, t.length()-2); 63 } 64 } else 65 return false; 66 } 67 68 // Verify string is off the form (javaId \.)+ or javaId 69 if (valid) { 70 String[] javaIds = t.split("\\.", t.length()+2); 71 for(String javaId: javaIds) 72 valid &= SourceVersion.isIdentifier(javaId); 73 } 74 return valid; 75 } 76 validImportStringToPatternString(String s)77 public static String validImportStringToPatternString(String s) { 78 if (s.equals("*")) { 79 return allMatchesString; 80 } else { 81 String s_prime = s.replace(".", "\\."); 82 83 if (s_prime.endsWith("*")) { 84 s_prime = s_prime.substring(0, s_prime.length() - 1) + ".+"; 85 } 86 87 return s_prime; 88 } 89 } 90 validImportStringToPattern(String s)91 public static Pattern validImportStringToPattern(String s) { 92 String pattern = validImportStringToPatternString(s); 93 94 if (pattern == allMatchesString) { 95 return allMatches; 96 } else { 97 return Pattern.compile(pattern); 98 } 99 } 100 101 } 102