package com.atlassian.plugin.spring.pluginns;
   
   import com.atlassian.plugin.spring.PluginBeanDefinitionRegistry;
   import org.springframework.beans.factory.config.BeanDefinitionHolder;
   import org.springframework.beans.factory.xml.BeanDefinitionDecorator;
   import org.springframework.beans.factory.xml.ParserContext;
   import org.w3c.dom.Node;
   
   import javax.annotation.Nonnull;
  
  /**
   * Matches the <plugin:interface> element and registers it against the bean for later processing.
   */
  public class PluginInterfaceBeanDefinitionDecorator implements BeanDefinitionDecorator {
      /**
       * Called when the Spring parser encounters an "interface" element.
       *
       * @param source The interface element
       * @param holder The containing bean definition
       * @param ctx    The parser context
       * @return The containing bean definition
       */
      @Nonnull
      @Override
      public BeanDefinitionHolder decorate(@Nonnull Node source, @Nonnull BeanDefinitionHolder holder,
                                           @Nonnull ParserContext ctx) {
          final String inf = source.getTextContent();
          if (inf != null) {
              new PluginBeanDefinitionRegistry(ctx.getRegistry()).addBeanInterface(holder.getBeanName(), inf.trim());
          }
          return holder;
      }
  }