| /** |
| * 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.cxf.jaxb; |
| |
| import java.lang.reflect.Constructor; |
| |
| import org.apache.cxf.Bus; |
| import org.apache.cxf.common.spi.ClassGeneratorClassLoader; |
| import org.apache.cxf.common.util.ASMHelper; |
| import org.apache.cxf.common.util.OpcodesProxy; |
| import org.apache.cxf.common.util.ReflectionUtil; |
| import org.apache.cxf.common.util.StringUtils; |
| |
| |
| public class FactoryClassGenerator extends ClassGeneratorClassLoader implements FactoryClassCreator { |
| private final ASMHelper helper; |
| FactoryClassGenerator(Bus bus) { |
| super(bus); |
| helper = bus.getExtension(ASMHelper.class); |
| } |
| @SuppressWarnings("unused") |
| public Class<?> createFactory(Class<?> cls) { |
| String newClassName = cls.getName() + "Factory"; |
| Class<?> factoryClass = findClass(newClassName, cls); |
| if (factoryClass != null) { |
| return factoryClass; |
| } |
| Constructor<?> contructor = ReflectionUtil.getDeclaredConstructors(cls)[0]; |
| OpcodesProxy opcodes = helper.getOpCodes(); |
| ASMHelper.ClassWriter cw = helper.createClassWriter(); |
| ASMHelper.MethodVisitor mv; |
| |
| cw.visit(opcodes.V1_6, opcodes.ACC_PUBLIC + opcodes.ACC_SUPER, |
| StringUtils.periodToSlashes(newClassName), null, "java/lang/Object", null); |
| |
| cw.visitSource(cls.getSimpleName() + "Factory" + ".java", null); |
| |
| mv = cw.visitMethod(opcodes.ACC_PUBLIC, "<init>", "()V", null, null); |
| mv.visitCode(); |
| mv.visitVarInsn(opcodes.ALOAD, 0); |
| mv.visitMethodInsn(opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); |
| mv.visitInsn(opcodes.RETURN); |
| mv.visitMaxs(0, 0); |
| mv.visitEnd(); |
| |
| mv = cw.visitMethod(opcodes.ACC_PUBLIC, "create" + cls.getSimpleName(), |
| "()L" + StringUtils.periodToSlashes(cls.getName()) + ";", null, null); |
| mv.visitCode(); |
| String name = cls.getName().replace('.', '/'); |
| mv.visitTypeInsn(opcodes.NEW, name); |
| mv.visitInsn(opcodes.DUP); |
| StringBuilder paraString = new StringBuilder(32).append('('); |
| |
| for (Class<?> paraClass : contructor.getParameterTypes()) { |
| mv.visitInsn(opcodes.ACONST_NULL); |
| paraString.append("Ljava/lang/Object;"); |
| } |
| paraString.append(")V"); |
| |
| mv.visitMethodInsn(opcodes.INVOKESPECIAL, name, "<init>", paraString.toString(), false); |
| |
| mv.visitInsn(opcodes.ARETURN); |
| mv.visitMaxs(0, 0); |
| mv.visitEnd(); |
| |
| cw.visitEnd(); |
| return loadClass(newClassName, cls, cw.toByteArray()); |
| } |
| } |