| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.mkstubs; |
| |
| import com.android.mkstubs.Main.Logger; |
| |
| import org.objectweb.asm.AnnotationVisitor; |
| import org.objectweb.asm.Attribute; |
| import org.objectweb.asm.ClassVisitor; |
| import org.objectweb.asm.FieldVisitor; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| |
| /** |
| * A class visitor that filters out all members (fields, methods and inner classes) that are |
| * either private, default-access or rejected by the {@link Filter}. |
| */ |
| class FilterClassAdapter extends ClassVisitor { |
| |
| private final Logger mLog; |
| private final Filter mFilter; |
| private String mClassName; |
| |
| public FilterClassAdapter(ClassVisitor writer, Filter filter, Logger log) { |
| super(Opcodes.ASM4, writer); |
| mFilter = filter; |
| mLog = log; |
| } |
| |
| @Override |
| public void visit(int version, int access, String name, String signature, |
| String superName, String[] interfaces) { |
| |
| mClassName = name; |
| super.visit(version, access, name, signature, superName, interfaces); |
| } |
| |
| @Override |
| public void visitEnd() { |
| super.visitEnd(); |
| } |
| |
| /** |
| * Visits a field. |
| * |
| * {@inheritDoc} |
| * |
| * Examples: |
| * name = mArg |
| * desc = Ljava/Lang/String; |
| * signature = null (not a template) or template type |
| */ |
| @Override |
| public FieldVisitor visitField(int access, String name, String desc, |
| String signature, Object value) { |
| // only accept public/protected fields |
| if ((access & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED)) == 0) { |
| return null; |
| } |
| |
| // filter on field name |
| String filterName = String.format("%s#%s", mClassName, name); |
| |
| if (!mFilter.accept(filterName)) { |
| mLog.debug("- Remove field " + filterName); |
| return null; |
| } |
| |
| // TODO we should produce an error if a filtered desc/signature is being used. |
| |
| return super.visitField(access, name, desc, signature, value); |
| } |
| |
| /** |
| * Visits a method. |
| * |
| * {@inheritDoc} |
| * |
| * Examples: |
| * name = <init> |
| * desc = ()V |
| * signature = null (not a template) or template type |
| */ |
| @Override |
| public MethodVisitor visitMethod(int access, String name, String desc, |
| String signature, String[] exceptions) { |
| |
| // only accept public/protected methods |
| if ((access & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED)) == 0) { |
| return null; |
| } |
| |
| // filter on method name using the non-generic descriptor |
| String filterName = String.format("%s#%s%s", mClassName, name, desc); |
| |
| if (!mFilter.accept(filterName)) { |
| mLog.debug("- Remove method " + filterName); |
| return null; |
| } |
| |
| // filter on method name using the generic signature |
| if (signature != null) { |
| filterName = String.format("%s#%s%s", mClassName, name, signature); |
| |
| if (!mFilter.accept(filterName)) { |
| mLog.debug("- Remove method " + filterName); |
| return null; |
| } |
| } |
| |
| // TODO we should produce an error if a filtered desc/signature/exception is being used. |
| |
| return super.visitMethod(access, name, desc, signature, exceptions); |
| } |
| |
| @Override |
| public AnnotationVisitor visitAnnotation(String desc, boolean visible) { |
| |
| // TODO produce an error if a filtered annotation type is being used |
| return super.visitAnnotation(desc, visible); |
| } |
| |
| @Override |
| public void visitAttribute(Attribute attr) { |
| // pass |
| } |
| |
| @Override |
| public void visitInnerClass(String name, String outerName, String innerName, int access) { |
| |
| // only accept public/protected inner classes |
| if ((access & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED)) == 0) { |
| return; |
| } |
| |
| // filter on name |
| if (!mFilter.accept(name)) { |
| return; |
| } |
| |
| super.visitInnerClass(name, outerName, innerName, access); |
| } |
| |
| @Override |
| public void visitOuterClass(String owner, String name, String desc) { |
| // pass |
| } |
| |
| @Override |
| public void visitSource(String source, String debug) { |
| // pass |
| } |
| } |