// license-header java merge-point
   //
   // Attention: generated code (by MetafacadeLogic.vsl) - do not modify!
   //
   package org.andromda.metafacades.uml14;
   
   import java.util.Collection;
   import java.util.List;
   import org.andromda.core.metafacade.MetafacadeBase;
  import org.andromda.core.metafacade.ModelValidationMessage;
  import org.andromda.metafacades.uml.ExtendFacade;
  import org.andromda.metafacades.uml.ExtensionPointFacade;
  import org.andromda.metafacades.uml.UseCaseFacade;
  import org.apache.log4j.Logger;
  import org.omg.uml.behavioralelements.usecases.Extend;
  
  /**
   * A relationship from an extending use case to an extended use case that specifies how and when the
   * behavior defined in the extending use case can be inserted into the behavior defined in the
   * extended use case.
   * MetafacadeLogic for ExtendFacade
   *
   * @see ExtendFacade
   */
  public abstract class ExtendFacadeLogic
      extends ModelElementFacadeLogicImpl
      implements ExtendFacade
  {
      /**
       * The underlying UML object
       * @see Extend
       */
      protected Extend metaObject;
  
      /** Create Metafacade implementation instance using the MetafacadeFactory from the context
       * @param metaObjectIn
       * @param context
       */
      protected ExtendFacadeLogic(Extend metaObjectIn, String context)
      {
          super(metaObjectIn, getContext(context));
          this.metaObject = metaObjectIn;
      }
  
      /**
       * The logger instance.
       */
      private static final Logger logger = Logger.getLogger(ExtendFacadeLogic.class);
  
      /**
       * Gets the context for this metafacade logic instance.
       * @param context String. Set to ExtendFacade if null
       * @return context String
       */
      private static String getContext(String context)
      {
          if (context == null)
          {
              context = "org.andromda.metafacades.uml.ExtendFacade";
          }
          return context;
      }
  
      /** Reset context only for non-root metafacades
       * @param context
       */
      @Override
      public void resetMetafacadeContext(String context)
      {
          if (!this.contextRoot) // reset context only for non-root metafacades
          {
              context = getContext(context);  // to have same value as in original constructor call
              setMetafacadeContext (context);
          }
      }
  
      /**
       * @return boolean true always
       * @see ExtendFacade
       */
      public boolean isExtendFacadeMetaType()
      {
          return true;
      }
  
      // ------------- associations ------------------
  
      private List<ExtensionPointFacade> __getExtensionPoints1r;
      private boolean __getExtensionPoints1rSet = false;
  
      /**
       * A relationship from an extending use case to an extended use case that specifies how and when
       * the
       * behavior defined in the extending use case can be inserted into the behavior defined in the
       * extended
       * use case.
       * @return (List<ExtensionPointFacade>)handleGetExtensionPoints()
       */
      public final List<ExtensionPointFacade> getExtensionPoints()
     {
         List<ExtensionPointFacade> getExtensionPoints1r = this.__getExtensionPoints1r;
         if (!this.__getExtensionPoints1rSet)
         {
             // extendFacade has no pre constraints
             List result = handleGetExtensionPoints();
             List shieldedResult = this.shieldedElements(result);
             try
             {
                 getExtensionPoints1r = (List<ExtensionPointFacade>)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 ExtendFacadeLogic.logger.warn("incorrect metafacade cast for ExtendFacadeLogic.getExtensionPoints List<ExtensionPointFacade> " + result + ": " + shieldedResult);
             }
             // extendFacade has no post constraints
             this.__getExtensionPoints1r = getExtensionPoints1r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getExtensionPoints1rSet = true;
             }
         }
         return getExtensionPoints1r;
     }
 
     /**
      * UML Specific type is returned in Collection, transformed by shieldedElements to AndroMDA Metafacade type
      * @return  List
      */
     protected abstract List handleGetExtensionPoints();
 
     private UseCaseFacade __getBase2r;
     private boolean __getBase2rSet = false;
 
     /**
      * The extend instances related to this use-case.
      * @return (UseCaseFacade)handleGetBase()
      */
     public final UseCaseFacade getBase()
     {
         UseCaseFacade getBase2r = this.__getBase2r;
         if (!this.__getBase2rSet)
         {
             // extends has no pre constraints
             Object result = handleGetBase();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getBase2r = (UseCaseFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 ExtendFacadeLogic.logger.warn("incorrect metafacade cast for ExtendFacadeLogic.getBase UseCaseFacade " + result + ": " + shieldedResult);
             }
             // extends has no post constraints
             this.__getBase2r = getBase2r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getBase2rSet = true;
             }
         }
         return getBase2r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetBase();
 
     private UseCaseFacade __getExtension3r;
     private boolean __getExtension3rSet = false;
 
     /**
      * A relationship from an extending use case to an extended use case that specifies how and when
      * the
      * behavior defined in the extending use case can be inserted into the behavior defined in the
      * extended
      * use case.
      * @return (UseCaseFacade)handleGetExtension()
      */
     public final UseCaseFacade getExtension()
     {
         UseCaseFacade getExtension3r = this.__getExtension3r;
         if (!this.__getExtension3rSet)
         {
             // extendFacade has no pre constraints
             Object result = handleGetExtension();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getExtension3r = (UseCaseFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 ExtendFacadeLogic.logger.warn("incorrect metafacade cast for ExtendFacadeLogic.getExtension UseCaseFacade " + result + ": " + shieldedResult);
             }
             // extendFacade has no post constraints
             this.__getExtension3r = getExtension3r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getExtension3rSet = true;
             }
         }
         return getExtension3r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetExtension();
 
     /**
      * @param validationMessages Collection<ModelValidationMessage>
      * @see ModelElementFacadeLogicImpl#validateInvariants(Collection validationMessages)
      */
     @Override
     public void validateInvariants(Collection<ModelValidationMessage> validationMessages)
     {
         super.validateInvariants(validationMessages);
     }
 }