package ch.qos.logback.core.joran;
   
   import ch.qos.logback.core.Context;
   import ch.qos.logback.core.joran.util.PropertySetter;
   import ch.qos.logback.core.joran.util.beans.BeanDescriptionCache;
   import ch.qos.logback.core.model.Model;
   import ch.qos.logback.core.model.ParamModel;
   import ch.qos.logback.core.model.processor.ModelHandlerBase;
   import ch.qos.logback.core.model.processor.ModelHandlerException;
  import ch.qos.logback.core.model.processor.ModelInterpretationContext;
  
  public class ParamModelHandler extends ModelHandlerBase {
  
      private final BeanDescriptionCache beanDescriptionCache;
  
      public ParamModelHandler(Context context, BeanDescriptionCache beanDescriptionCache) {
          super(context);
          this.beanDescriptionCache = beanDescriptionCache;
      }
  
      static public ModelHandlerBase makeInstance(Context context, ModelInterpretationContext ic) {
          return new ParamModelHandler(context, ic.getBeanDescriptionCache());
      }
  
      @Override
      protected Class<ParamModel> getSupportedModelClass() {
          return ParamModel.class;
      }
  
      @Override
      public void handle(ModelInterpretationContext intercon, Model model) throws ModelHandlerException {
  
          ParamModel paramModel = (ParamModel) model;
  
          String valueStr = intercon.subst(paramModel.getValue());
  
          Object o = intercon.peekObject();
  
          PropertySetter propSetter = new PropertySetter(beanDescriptionCache, o);
          propSetter.setContext(context);
  
          // allow for variable substitution for name as well
          String finalName = intercon.subst(paramModel.getName());
          propSetter.setProperty(finalName, valueStr);
      }
  
  }