// 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.AssociationEndFacade;
  import org.andromda.metafacades.uml.InstanceFacade;
  import org.andromda.metafacades.uml.LinkEndFacade;
  import org.andromda.metafacades.uml.LinkFacade;
  import org.apache.log4j.Logger;
  import org.omg.uml.behavioralelements.commonbehavior.LinkEnd;
  
  /**
   * Can be an AttributeLinkImpl or LinkEndImpl. A representation of the model object 'Slot'. A slot
   * specifies that an entity modeled by an instance specification has a value or values for a
   * specific structural feature.
   * MetafacadeLogic for LinkEndFacade
   *
   * @see LinkEndFacade
   */
  public abstract class LinkEndFacadeLogic
      extends ModelElementFacadeLogicImpl
      implements LinkEndFacade
  {
      /**
       * The underlying UML object
       * @see LinkEnd
       */
      protected LinkEnd metaObject;
  
      /** Create Metafacade implementation instance using the MetafacadeFactory from the context
       * @param metaObjectIn
       * @param context
       */
      protected LinkEndFacadeLogic(LinkEnd metaObjectIn, String context)
      {
          super(metaObjectIn, getContext(context));
          this.metaObject = metaObjectIn;
      }
  
      /**
       * The logger instance.
       */
      private static final Logger logger = Logger.getLogger(LinkEndFacadeLogic.class);
  
      /**
       * Gets the context for this metafacade logic instance.
       * @param context String. Set to LinkEndFacade if null
       * @return context String
       */
      private static String getContext(String context)
      {
          if (context == null)
          {
              context = "org.andromda.metafacades.uml.LinkEndFacade";
          }
          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 LinkEndFacade
       */
      public boolean isLinkEndFacadeMetaType()
      {
          return true;
      }
  
      // ------------- associations ------------------
  
      private LinkFacade __getLink1r;
      private boolean __getLink1rSet = false;
  
      /**
       * The two links ends owned by this link.
       * @return (LinkFacade)handleGetLink()
       */
      public final LinkFacade getLink()
      {
          LinkFacade getLink1r = this.__getLink1r;
          if (!this.__getLink1rSet)
         {
             // linkEnds has no pre constraints
             Object result = handleGetLink();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getLink1r = (LinkFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 LinkEndFacadeLogic.logger.warn("incorrect metafacade cast for LinkEndFacadeLogic.getLink LinkFacade " + result + ": " + shieldedResult);
             }
             // linkEnds has no post constraints
             this.__getLink1r = getLink1r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getLink1rSet = true;
             }
         }
         return getLink1r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetLink();
 
     private AssociationEndFacade __getAssociationEnd2r;
     private boolean __getAssociationEnd2rSet = false;
 
     /**
      * Can be an AttributeLinkImpl or LinkEndImpl. A representation of the model object 'Slot'. A
      * slot
      * specifies that an entity modeled by an instance specification has a value or values for a
      * specific
      * structural feature.
      * @return (AssociationEndFacade)handleGetAssociationEnd()
      */
     public final AssociationEndFacade getAssociationEnd()
     {
         AssociationEndFacade getAssociationEnd2r = this.__getAssociationEnd2r;
         if (!this.__getAssociationEnd2rSet)
         {
             // linkEndFacade has no pre constraints
             Object result = handleGetAssociationEnd();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getAssociationEnd2r = (AssociationEndFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 LinkEndFacadeLogic.logger.warn("incorrect metafacade cast for LinkEndFacadeLogic.getAssociationEnd AssociationEndFacade " + result + ": " + shieldedResult);
             }
             // linkEndFacade has no post constraints
             this.__getAssociationEnd2r = getAssociationEnd2r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getAssociationEnd2rSet = true;
             }
         }
         return getAssociationEnd2r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetAssociationEnd();
 
     private InstanceFacade __getInstance3r;
     private boolean __getInstance3rSet = false;
 
     /**
      * Those slots that map onto association ends.
      * @return (InstanceFacade)handleGetInstance()
      */
     public final InstanceFacade getInstance()
     {
         InstanceFacade getInstance3r = this.__getInstance3r;
         if (!this.__getInstance3rSet)
         {
             // linkEnds has no pre constraints
             Object result = handleGetInstance();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getInstance3r = (InstanceFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 LinkEndFacadeLogic.logger.warn("incorrect metafacade cast for LinkEndFacadeLogic.getInstance InstanceFacade " + result + ": " + shieldedResult);
             }
             // linkEnds has no post constraints
             this.__getInstance3r = getInstance3r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getInstance3rSet = true;
             }
         }
         return getInstance3r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetInstance();
 
     private Collection<InstanceFacade> __getInstances4r;
     private boolean __getInstances4rSet = false;
 
     /**
      * Can be an AttributeLinkImpl or LinkEndImpl. A representation of the model object 'Slot'. A
      * slot
      * specifies that an entity modeled by an instance specification has a value or values for a
      * specific
      * structural feature.
      * @return (Collection<InstanceFacade>)handleGetInstances()
      */
     public final Collection<InstanceFacade> getInstances()
     {
         Collection<InstanceFacade> getInstances4r = this.__getInstances4r;
         if (!this.__getInstances4rSet)
         {
             // linkEndFacade has no pre constraints
             Collection result = handleGetInstances();
             List shieldedResult = this.shieldedElements(result);
             try
             {
                 getInstances4r = (Collection<InstanceFacade>)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 LinkEndFacadeLogic.logger.warn("incorrect metafacade cast for LinkEndFacadeLogic.getInstances Collection<InstanceFacade> " + result + ": " + shieldedResult);
             }
             // linkEndFacade has no post constraints
             this.__getInstances4r = getInstances4r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getInstances4rSet = true;
             }
         }
         return getInstances4r;
     }
 
     /**
      * UML Specific type is returned in Collection, transformed by shieldedElements to AndroMDA Metafacade type
      * @return  Collection
      */
     protected abstract Collection handleGetInstances();
 
     /**
      * @param validationMessages Collection<ModelValidationMessage>
      * @see ModelElementFacadeLogicImpl#validateInvariants(Collection validationMessages)
      */
     @Override
     public void validateInvariants(Collection<ModelValidationMessage> validationMessages)
     {
         super.validateInvariants(validationMessages);
     }
 }