/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.runtime.config.spring.parsers.delegate;

import org.mule.runtime.config.spring.parsers.MuleDefinitionParser;

import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.xml.ParserContext;
import org.w3c.dom.Element;

/**
 * Extend {@link org.mule.runtime.config.spring.parsers.delegate.AbstractSerialDelegatingDefinitionParser} to return the first
 * definition as the final result
 */
public class AbstractFirstResultSerialDefinitionParser extends AbstractSerialDelegatingDefinitionParser {

  protected AbstractBeanDefinition firstDefinition;
  private boolean returnFirstResult = true;

  public AbstractFirstResultSerialDefinitionParser() {
    super();
  }

  public AbstractFirstResultSerialDefinitionParser(boolean doReset) {
    super(doReset);
  }

  public void setReturnFirstResult(boolean returnFirstResult) {
    this.returnFirstResult = returnFirstResult;
  }

  protected AbstractBeanDefinition doSingleBean(int index, MuleDefinitionParser parser, Element element,
                                                ParserContext parserContext) {
    try {
      AbstractBeanDefinition result = null;
      try {
        result = super.doSingleBean(index, parser, element, parserContext);
      } catch (RuntimeException e) {
        if (!isExceptionHandled(e)) {
          throw e;
        }
      }
      if (0 == index) {
        firstDefinition = result;
      }
      if (size() == index + 1) {
        if (returnFirstResult) {
          return firstDefinition;
        } else {
          return result;
        }
      } else {
        return null;
      }
    } catch (RuntimeException e) {
      firstDefinition = null;
      throw e;
    }
  }

}