proxy/proxy-impl/src/main/java/org/apache/aries/proxy/impl/interfaces/InterfaceUsingWovenProxyAdapter.java

/*
 * 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.aries.proxy.impl.interfaces;

import org.apache.aries.proxy.impl.common.AbstractWovenProxyAdapter;
import org.apache.aries.proxy.impl.common.AbstractWovenProxyMethodAdapter;
import org.apache.aries.proxy.impl.common.WovenProxyAbstractMethodAdapter;
import org.apache.aries.proxy.impl.common.WovenProxyConcreteMethodAdapter;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.Method;

/**
 * Used to copy method signatures into a new class
 */
final class InterfaceUsingWovenProxyAdapter extends AbstractWovenProxyAdapter {

  public InterfaceUsingWovenProxyAdapter(ClassVisitor writer, String className,
      ClassLoader loader) {
    super(writer, className, loader);
  }

  /**
   * Return a {@link MethodVisitor} that provides basic implementations for all
   * methods - the easiest thing to do for methods that aren't abstract is to
   * pretend that they are, but drive the adapter ourselves
   */ 
  protected final AbstractWovenProxyMethodAdapter getWeavingMethodVisitor(int access, String name,
      String desc, String signature, String[] exceptions, Method currentMethod,
      String methodStaticFieldName, Type currentMethodDeclaringType,
      boolean currentMethodDeclaringTypeIsInterface) {
    
    boolean isDefaultMethod = currentMethodDeclaringTypeIsInterface && 
        ((access & (ACC_ABSTRACT | ACC_PUBLIC | ACC_STATIC)) == ACC_PUBLIC);
      
      
    if ((access & ACC_ABSTRACT) != 0 || isDefaultMethod) {
      access &= ~ACC_ABSTRACT;
      return new WovenProxyAbstractMethodAdapter(cv.visitMethod(
          access, name, desc, signature, exceptions), access, name, desc,
          methodStaticFieldName, currentMethod, typeBeingWoven, 
          currentMethodDeclaringType, currentMethodDeclaringTypeIsInterface, isDefaultMethod);
    } else {
      return new WovenProxyConcreteMethodAdapter(cv.visitMethod(
          access, name, desc, signature, exceptions), access, name, desc, exceptions, 
          methodStaticFieldName, currentMethod, typeBeingWoven, 
          currentMethodDeclaringType, currentMethodDeclaringTypeIsInterface);
    }
  }
}