/*
 * 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.generic;

import org.mule.runtime.config.spring.parsers.assembly.BeanAssembler;
import org.mule.runtime.core.util.StringUtils;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.ParserContext;
import org.w3c.dom.Element;

/**
 * This class should be used when the same element can be configured as a child or an orphan (i.e., top-level). It will inject the
 * bean into the parent if the parent exists, otherwise it will not complain (ChildDefinitionParser throws an exception if no
 * parent exists).
 */
public class OptionalChildDefinitionParser extends ChildDefinitionParser {

  private boolean isChild;

  public OptionalChildDefinitionParser(String setterMethod) {
    super(setterMethod);
  }

  public OptionalChildDefinitionParser(String setterMethod, Class clazz) {
    super(setterMethod, clazz);
  }

  public OptionalChildDefinitionParser(String setterMethod, Class clazz, Class constraint) {
    super(setterMethod, clazz, constraint);
  }

  public OptionalChildDefinitionParser(String setterMethod, Class clazz, Class constraint, boolean allowClassAttribute) {
    super(setterMethod, clazz, constraint, allowClassAttribute);
  }

  @Override
  protected void parseChild(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
    isChild = isChild(element, parserContext, builder);
    super.parseChild(element, parserContext, builder);
  }

  protected boolean isChild(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
    String parentBean = getParentBeanName(element);
    return !(StringUtils.isBlank(parentBean));
  }

  public BeanDefinition getParentBeanDefinition(Element element) {
    if (isChild) {
      return super.getParentBeanDefinition(element);
    } else {
      return null;
    }
  }

  protected void postProcess(ParserContext context, BeanAssembler assembler, Element element) {
    if (isChild) {
      super.postProcess(context, assembler, element);
    }
  }
}