MemberNameFilter.java revision db267bc191f906f55eaef21a27110cce2ec57fdf
1/* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2009 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 */ 21package proguard.classfile.visitor; 22 23import proguard.classfile.*; 24import proguard.util.*; 25 26 27/** 28 * This <code>MemberVisitor</code> delegates its visits to another given 29 * <code>MemberVisitor</code>, but only when the visited member 30 * has a name that matches a given regular expression. 31 * 32 * @author Eric Lafortune 33 */ 34public class MemberNameFilter implements MemberVisitor 35{ 36 private final StringMatcher regularExpressionMatcher; 37 private final MemberVisitor memberVisitor; 38 39 40 /** 41 * Creates a new MemberNameFilter. 42 * @param regularExpression the regular expression against which member 43 * names will be matched. 44 * @param memberVisitor the <code>MemberVisitor</code> to which visits 45 * will be delegated. 46 */ 47 public MemberNameFilter(String regularExpression, 48 MemberVisitor memberVisitor) 49 { 50 this(new NameParser().parse(regularExpression), memberVisitor); 51 } 52 53 54 /** 55 * Creates a new MemberNameFilter. 56 * @param regularExpressionMatcher the regular expression against which 57 * member names will be matched. 58 * @param memberVisitor the <code>MemberVisitor</code> to which 59 * visits will be delegated. 60 */ 61 public MemberNameFilter(StringMatcher regularExpressionMatcher, 62 MemberVisitor memberVisitor) 63 { 64 this.regularExpressionMatcher = regularExpressionMatcher; 65 this.memberVisitor = memberVisitor; 66 } 67 68 69 // Implementations for MemberVisitor. 70 71 public void visitProgramField(ProgramClass programClass, ProgramField programField) 72 { 73 if (accepted(programField.getName(programClass))) 74 { 75 memberVisitor.visitProgramField(programClass, programField); 76 } 77 } 78 79 80 public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) 81 { 82 if (accepted(programMethod.getName(programClass))) 83 { 84 memberVisitor.visitProgramMethod(programClass, programMethod); 85 } 86 } 87 88 89 public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField) 90 { 91 if (accepted(libraryField.getName(libraryClass))) 92 { 93 memberVisitor.visitLibraryField(libraryClass, libraryField); 94 } 95 } 96 97 98 public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod) 99 { 100 if (accepted(libraryMethod.getName(libraryClass))) 101 { 102 memberVisitor.visitLibraryMethod(libraryClass, libraryMethod); 103 } 104 } 105 106 107 // Small utility methods. 108 109 private boolean accepted(String name) 110 { 111 return regularExpressionMatcher.matches(name); 112 } 113} 114