ConstructorFinder.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.common;

import static org.objectweb.asm.Opcodes.ACC_PRIVATE;

import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;

public class ConstructorFinder extends ClassVisitor
{

  private boolean hasNoArgsConstructor = false;
  
  public boolean hasNoArgsConstructor()
  {
    return hasNoArgsConstructor;
  }

  public ConstructorFinder()
  {
    super(Opcodes.ASM5);
  }

  @Override
  public MethodVisitor visitMethod(int access, String name, String desc, String signature,
      String[] exceptions)
  {
    if("<init>".equals(name)) {
      if(Type.getArgumentTypes(desc).length == 0 && (access & ACC_PRIVATE) == 0)
        hasNoArgsConstructor = true;
    }
    return null;
  }
}