/*
 * Copyright (c) 1998-2012 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.ejb.gen;

import java.io.IOException;

import javax.ejb.TransactionAttribute;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedType;

import com.caucho.config.gen.MethodTailGenerator;
import com.caucho.inject.Module;
import com.caucho.java.JavaWriter;

/**
 * Represents a stateless local business method
 */
@Module
public class MessageMethodTailGenerator<X> extends MethodTailGenerator<X>
{
  public MessageMethodTailGenerator(MessageMethodTailFactory<X> factory,
                                    AnnotatedMethod<? super X> method)
  {
    super(factory, method);
  }

  /**
   * Generates code in the "try" block before the call
   * <code><pre>
   * retType myMethod(...)
   * {
   *   ...
   *   try {
   *     [pre-call]
   *     ret = super.myMethod(...)
   *     ...
   * }
   * </pre></code>
   */
  @Override
  public void generatePreCall(JavaWriter out)
    throws IOException
  {
    AnnotatedType<?> declType = getMethod().getDeclaringType();
    
    if (getMethod().isAnnotationPresent(TransactionAttribute.class)
        || declType.isAnnotationPresent(TransactionAttribute.class)) {
      out.println();
      out.println("if (! _isXa && _xaResource != null)");
      out.println("  _xa.enlist(_xaResource);");
    }
    
    super.generatePreCall(out);
  }
}
