package ch.qos.logback.core.model.processor;
   
   import java.util.Stack;
   
   import ch.qos.logback.core.Context;
   import ch.qos.logback.core.ContextBase;
   import ch.qos.logback.core.model.Model;
   import ch.qos.logback.core.model.StackModel;
   
  public class StackModelHandler  extends ModelHandlerBase {
  
      static public final String STACK_TEST = "STACK_TEST"; 
      
      public StackModelHandler(Context context) {
          super(context);
      }
  
      static public ModelHandlerBase makeInstance(Context context, ModelInterpretationContext ic) {
          return new StackModelHandler(context);
      }
  
      @Override
      protected Class<StackModel> getSupportedModelClass() {
          return StackModel.class;
      }
      
      @Override
      public void handle(ModelInterpretationContext mic, Model model) throws ModelHandlerException {
          
          StackModel stackModel = (StackModel) model;
          
          String name = stackModel.getName();
          
          ContextBase contextBase = (ContextBase) context;
          
          @SuppressWarnings("unchecked")
          Stack<String> aStack = (Stack) context.getObject(STACK_TEST);
          if(aStack == null) {
              aStack = new Stack<>();
              contextBase.putObject(STACK_TEST, aStack);
          }
          aStack.push(name);
      }
      
      @Override
      public void postHandle(ModelInterpretationContext intercon, Model model) throws ModelHandlerException {
      }
  
  }