| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2014 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.*; |
| import proguard.classfile.util.*; |
| |
| /** |
| * This <code>MemberVisitor</code> delegates its visits to another given |
| * <code>MemberVisitor</code>, but only when the visited member is accessible |
| * from the given referencing class. |
| * |
| * @author Eric Lafortune |
| */ |
| public class MemberClassAccessFilter |
| implements MemberVisitor |
| { |
| private final Clazz referencingClass; |
| private final MemberVisitor memberVisitor; |
| |
| |
| /** |
| * Creates a new MemberAccessFilter. |
| * @param referencingClass the class that is accessing the member. |
| * @param memberVisitor the <code>MemberVisitor</code> to which visits |
| * will be delegated. |
| */ |
| public MemberClassAccessFilter(Clazz referencingClass, |
| MemberVisitor memberVisitor) |
| { |
| this.referencingClass = referencingClass; |
| this.memberVisitor = memberVisitor; |
| } |
| |
| |
| // Implementations for MemberVisitor. |
| |
| public void visitProgramField(ProgramClass programClass, ProgramField programField) |
| { |
| if (accepted(programClass, programField.getAccessFlags())) |
| { |
| memberVisitor.visitProgramField(programClass, programField); |
| } |
| } |
| |
| |
| public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) |
| { |
| if (accepted(programClass, programMethod.getAccessFlags())) |
| { |
| memberVisitor.visitProgramMethod(programClass, programMethod); |
| } |
| } |
| |
| |
| public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField) |
| { |
| if (accepted(libraryClass, libraryField.getAccessFlags())) |
| { |
| memberVisitor.visitLibraryField(libraryClass, libraryField); |
| } |
| } |
| |
| |
| public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod) |
| { |
| if (accepted(libraryClass, libraryMethod.getAccessFlags())) |
| { |
| memberVisitor.visitLibraryMethod(libraryClass, libraryMethod); |
| } |
| } |
| |
| |
| // Small utility methods. |
| |
| private boolean accepted(Clazz clazz, int memberAccessFlags) |
| { |
| int accessLevel = AccessUtil.accessLevel(memberAccessFlags); |
| |
| return |
| (accessLevel >= AccessUtil.PUBLIC ) || |
| (accessLevel >= AccessUtil.PRIVATE && referencingClass.equals(clazz) ) || |
| (accessLevel >= AccessUtil.PACKAGE_VISIBLE && (ClassUtil.internalPackageName(referencingClass.getName()).equals( |
| ClassUtil.internalPackageName(clazz.getName())))) || |
| (accessLevel >= AccessUtil.PROTECTED && (referencingClass.extends_(clazz) || |
| referencingClass.extendsOrImplements(clazz)) ); |
| } |
| } |