| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.felix.ipojo.manipulation; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Set; |
| |
| import org.objectweb.asm.ClassReader; |
| import org.objectweb.asm.ClassWriter; |
| |
| /** |
| * Manipulates inner class allowing outer class access. The manipulated class |
| * has access to managed field of the outer class. |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| public class InnerClassManipulator { |
| |
| /** |
| * Component implementation class name. |
| */ |
| private String m_outer; |
| |
| /** |
| * Component class fields. |
| */ |
| private Set m_fields; |
| |
| /** |
| * Creates an inner class manipulator. |
| * @param classname : class name |
| * @param fields : fields |
| */ |
| public InnerClassManipulator(String classname, Set fields) { |
| m_outer = classname; |
| m_fields = fields; |
| } |
| |
| /** |
| * Manipulate the inner class. |
| * @param in input (i.e. original) class |
| * @return manipulated class |
| * @throws IOException the class cannot be read correctly |
| */ |
| public byte[] manipulate(byte[] in) throws IOException { |
| InputStream is1 = new ByteArrayInputStream(in); |
| |
| ClassReader cr = new ClassReader(is1); |
| ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); |
| InnerClassAdapter adapter = new InnerClassAdapter(cw, m_outer, m_fields); |
| cr.accept(adapter, ClassReader.SKIP_FRAMES); |
| is1.close(); |
| |
| return cw.toByteArray(); |
| } |
| |
| } |