package org.lcsim.conditions;
   
   /**
    * @version $Id: CachedConditionsImplementation.java,v 1.1.1.1 2010/01/25
    *          22:23:07 jeremy Exp $
    * @author tonyj
    */
   class CachedConditionsImplementation<T> extends ConditionsImplementation implements CachedConditions<T>, ConditionsListener {
       private ConditionsConverter<T> conv;
      private T data;
  
      CachedConditionsImplementation(ConditionsManagerImplementation manager, String name, ConditionsConverter<T> conv) {
          super(manager, name);
          this.conv = conv;
          manager.addConditionsListener(this);
      }
  
      public T getCachedData() {
          if (data == null)
              data = conv.getData(getManager(), getName());
          return data;
      }
  
      public void conditionsChanged(ConditionsEvent conditionsEvent) {
          data = null;
      }
  }