/*
    * Copyright 2010-2022 the original author or authors.
    *
    * Licensed 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
    *
    *    https://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.mybatis.spring.config;
  
  import java.lang.annotation.Annotation;
  
  import org.mybatis.spring.mapper.ClassPathMapperScanner;
  import org.mybatis.spring.mapper.MapperFactoryBean;
  import org.mybatis.spring.mapper.MapperScannerConfigurer;
  import org.springframework.beans.BeanUtils;
  import org.springframework.beans.factory.config.BeanDefinition;
  import org.springframework.beans.factory.support.AbstractBeanDefinition;
  import org.springframework.beans.factory.support.BeanDefinitionBuilder;
  import org.springframework.beans.factory.support.BeanNameGenerator;
  import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
  import org.springframework.beans.factory.xml.ParserContext;
  import org.springframework.beans.factory.xml.XmlReaderContext;
  import org.springframework.util.ClassUtils;
  import org.springframework.util.StringUtils;
  import org.w3c.dom.Element;
  
  /**
   * A {#code BeanDefinitionParser} that handles the element scan of the MyBatis. namespace
   *
   * @author Lishu Luo
   * @author Eduardo Macarron
   *
   * @since 1.2.0
   *
   * @see MapperFactoryBean
   * @see ClassPathMapperScanner
   * @see MapperScannerConfigurer
   */
  
  public class MapperScannerBeanDefinitionParser extends AbstractBeanDefinitionParser {
  
    private static final String ATTRIBUTE_BASE_PACKAGE = "base-package";
    private static final String ATTRIBUTE_ANNOTATION = "annotation";
    private static final String ATTRIBUTE_MARKER_INTERFACE = "marker-interface";
    private static final String ATTRIBUTE_NAME_GENERATOR = "name-generator";
    private static final String ATTRIBUTE_TEMPLATE_REF = "template-ref";
    private static final String ATTRIBUTE_FACTORY_REF = "factory-ref";
    private static final String ATTRIBUTE_MAPPER_FACTORY_BEAN_CLASS = "mapper-factory-bean-class";
    private static final String ATTRIBUTE_LAZY_INITIALIZATION = "lazy-initialization";
    private static final String ATTRIBUTE_DEFAULT_SCOPE = "default-scope";
  
    /**
     * {@inheritDoc}
     *
     * @since 2.0.2
     */
    @Override
    protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
      BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(MapperScannerConfigurer.class);
  
      ClassLoader classLoader = ClassUtils.getDefaultClassLoader();
  
      builder.addPropertyValue("processPropertyPlaceHolders", true);
      try {
        String annotationClassName = element.getAttribute(ATTRIBUTE_ANNOTATION);
        if (StringUtils.hasText(annotationClassName)) {
          @SuppressWarnings("unchecked")
          Class<? extends Annotation> annotationClass = (Class<? extends Annotation>) classLoader
              .loadClass(annotationClassName);
          builder.addPropertyValue("annotationClass", annotationClass);
        }
        String markerInterfaceClassName = element.getAttribute(ATTRIBUTE_MARKER_INTERFACE);
        if (StringUtils.hasText(markerInterfaceClassName)) {
          Class<?> markerInterface = classLoader.loadClass(markerInterfaceClassName);
          builder.addPropertyValue("markerInterface", markerInterface);
        }
        String nameGeneratorClassName = element.getAttribute(ATTRIBUTE_NAME_GENERATOR);
        if (StringUtils.hasText(nameGeneratorClassName)) {
          Class<?> nameGeneratorClass = classLoader.loadClass(nameGeneratorClassName);
          BeanNameGenerator nameGenerator = BeanUtils.instantiateClass(nameGeneratorClass, BeanNameGenerator.class);
          builder.addPropertyValue("nameGenerator", nameGenerator);
        }
        String mapperFactoryBeanClassName = element.getAttribute(ATTRIBUTE_MAPPER_FACTORY_BEAN_CLASS);
        if (StringUtils.hasText(mapperFactoryBeanClassName)) {
          @SuppressWarnings("unchecked")
          Class<? extends MapperFactoryBean> mapperFactoryBeanClass = (Class<? extends MapperFactoryBean>) classLoader
              .loadClass(mapperFactoryBeanClassName);
          builder.addPropertyValue("mapperFactoryBeanClass", mapperFactoryBeanClass);
        }
      } catch (Exception ex) {
        XmlReaderContext readerContext = parserContext.getReaderContext();
       readerContext.error(ex.getMessage(), readerContext.extractSource(element), ex.getCause());
     }
 
     builder.addPropertyValue("sqlSessionTemplateBeanName", element.getAttribute(ATTRIBUTE_TEMPLATE_REF));
     builder.addPropertyValue("sqlSessionFactoryBeanName", element.getAttribute(ATTRIBUTE_FACTORY_REF));
     builder.addPropertyValue("lazyInitialization", element.getAttribute(ATTRIBUTE_LAZY_INITIALIZATION));
     builder.addPropertyValue("defaultScope", element.getAttribute(ATTRIBUTE_DEFAULT_SCOPE));
     builder.addPropertyValue("basePackage", element.getAttribute(ATTRIBUTE_BASE_PACKAGE));
 
     // for spring-native
     builder.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
 
     return builder.getBeanDefinition();
   }
 
   /**
    * {@inheritDoc}
    *
    * @since 2.0.2
    */
   @Override
   protected boolean shouldGenerateIdAsFallback() {
     return true;
   }
 
 }