| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2013 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.classfile.visitor; |
| |
| import proguard.classfile.*; |
| |
| |
| /** |
| * This <code>ClassVisitor</code> delegates its visits to another given |
| * <code>ClassVisitor</code>, but only when the visited class |
| * has the proper access flags. |
| * |
| * @see ClassConstants |
| * |
| * @author Eric Lafortune |
| */ |
| public class ClassAccessFilter implements ClassVisitor |
| { |
| private final int requiredSetAccessFlags; |
| private final int requiredUnsetAccessFlags; |
| private final ClassVisitor classVisitor; |
| |
| |
| /** |
| * Creates a new ClassAccessFilter. |
| * @param requiredSetAccessFlags the class access flags that should be |
| * set. |
| * @param requiredUnsetAccessFlags the class access flags that should be |
| * unset. |
| * @param classVisitor the <code>ClassVisitor</code> to |
| * which visits will be delegated. |
| */ |
| public ClassAccessFilter(int requiredSetAccessFlags, |
| int requiredUnsetAccessFlags, |
| ClassVisitor classVisitor) |
| { |
| this.requiredSetAccessFlags = requiredSetAccessFlags; |
| this.requiredUnsetAccessFlags = requiredUnsetAccessFlags; |
| this.classVisitor = classVisitor; |
| } |
| |
| |
| // Implementations for ClassVisitor. |
| |
| public void visitProgramClass(ProgramClass programClass) |
| { |
| if (accepted(programClass.getAccessFlags())) |
| { |
| classVisitor.visitProgramClass(programClass); |
| } |
| } |
| |
| |
| public void visitLibraryClass(LibraryClass libraryClass) |
| { |
| if (accepted(libraryClass.getAccessFlags())) |
| { |
| classVisitor.visitLibraryClass(libraryClass); |
| } |
| } |
| |
| |
| // Small utility methods. |
| |
| private boolean accepted(int accessFlags) |
| { |
| return (requiredSetAccessFlags & ~accessFlags) == 0 && |
| (requiredUnsetAccessFlags & accessFlags) == 0; |
| } |
| } |