// 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.AssociationFacade;
  import org.apache.log4j.Logger;
  import org.omg.uml.foundation.core.UmlAssociation;
  
  /**
   * An association describes a set of tuples whose values refer to typed instances. An instance of an
   * association is called a link.
   * MetafacadeLogic for AssociationFacade
   *
   * @see AssociationFacade
   */
  public abstract class AssociationFacadeLogic
      extends GeneralizableElementFacadeLogicImpl
      implements AssociationFacade
  {
      /**
       * The underlying UML object
       * @see UmlAssociation
       */
      protected UmlAssociation metaObject;
  
      /** Create Metafacade implementation instance using the MetafacadeFactory from the context
       * @param metaObjectIn
       * @param context
       */
      protected AssociationFacadeLogic(UmlAssociation metaObjectIn, String context)
      {
          super(metaObjectIn, getContext(context));
          this.metaObject = metaObjectIn;
      }
  
      /**
       * The logger instance.
       */
      private static final Logger logger = Logger.getLogger(AssociationFacadeLogic.class);
  
      /**
       * Gets the context for this metafacade logic instance.
       * @param context String. Set to AssociationFacade if null
       * @return context String
       */
      private static String getContext(String context)
      {
          if (context == null)
          {
              context = "org.andromda.metafacades.uml.AssociationFacade";
          }
          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 AssociationFacade
       */
      public boolean isAssociationFacadeMetaType()
      {
          return true;
      }
  
      // --------------- attributes ---------------------
  
     /**
      * @see AssociationFacade#getRelationName()
      * @return String
      */
      protected abstract String handleGetRelationName();
  
      private String __relationName1a;
      private boolean __relationName1aSet = false;
  
      /**
       * A name suited for naming this relationship. This name will be constructed from both
       * association ends.
       * @return (String)handleGetRelationName()
       */
     public final String getRelationName()
     {
         String relationName1a = this.__relationName1a;
         if (!this.__relationName1aSet)
         {
             // relationName has no pre constraints
             relationName1a = handleGetRelationName();
             // relationName has no post constraints
             this.__relationName1a = relationName1a;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__relationName1aSet = true;
             }
         }
         return relationName1a;
     }
 
    /**
     * @see AssociationFacade#isMany2Many()
     * @return boolean
     */
     protected abstract boolean handleIsMany2Many();
 
     private boolean __many2Many2a;
     private boolean __many2Many2aSet = false;
 
     /**
      * Indicates whether or not this associations represents a many-to-many relation.
      * @return (boolean)handleIsMany2Many()
      */
     public final boolean isMany2Many()
     {
         boolean many2Many2a = this.__many2Many2a;
         if (!this.__many2Many2aSet)
         {
             // many2Many has no pre constraints
             many2Many2a = handleIsMany2Many();
             // many2Many has no post constraints
             this.__many2Many2a = many2Many2a;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__many2Many2aSet = true;
             }
         }
         return many2Many2a;
     }
 
    /**
     * @see AssociationFacade#isAssociationClass()
     * @return boolean
     */
     protected abstract boolean handleIsAssociationClass();
 
     private boolean __associationClass3a;
     private boolean __associationClass3aSet = false;
 
     /**
      * True if the AssociationFacade is an AssociationClass.
      * @return (boolean)handleIsAssociationClass()
      */
     public final boolean isAssociationClass()
     {
         boolean associationClass3a = this.__associationClass3a;
         if (!this.__associationClass3aSet)
         {
             // associationClass has no pre constraints
             associationClass3a = handleIsAssociationClass();
             // associationClass has no post constraints
             this.__associationClass3a = associationClass3a;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__associationClass3aSet = true;
             }
         }
         return associationClass3a;
     }
 
    /**
     * @see AssociationFacade#isAbstract()
     * @return boolean
     */
     protected abstract boolean handleIsAbstract();
 
     private boolean __abstract4a;
     private boolean __abstract4aSet = false;
 
     /**
      * Indicates if this association is 'abstract'.
      * @return (boolean)handleIsAbstract()
      */
     public final boolean isAbstract()
     {
         boolean abstract4a = this.__abstract4a;
         if (!this.__abstract4aSet)
         {
             // abstract has no pre constraints
             abstract4a = handleIsAbstract();
             // abstract has no post constraints
             this.__abstract4a = abstract4a;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__abstract4aSet = true;
             }
         }
         return abstract4a;
     }
 
    /**
     * @see AssociationFacade#isLeaf()
     * @return boolean
     */
     protected abstract boolean handleIsLeaf();
 
     private boolean __leaf5a;
     private boolean __leaf5aSet = false;
 
     /**
      * True if this association cannot be extended and represent a leaf in the inheritance tree.
      * @return (boolean)handleIsLeaf()
      */
     public final boolean isLeaf()
     {
         boolean leaf5a = this.__leaf5a;
         if (!this.__leaf5aSet)
         {
             // leaf has no pre constraints
             leaf5a = handleIsLeaf();
             // leaf has no post constraints
             this.__leaf5a = leaf5a;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__leaf5aSet = true;
             }
         }
         return leaf5a;
     }
 
    /**
     * @see AssociationFacade#isDerived()
     * @return boolean
     */
     protected abstract boolean handleIsDerived();
 
     private boolean __derived6a;
     private boolean __derived6aSet = false;
 
     /**
      * UML2: Returns the value of the 'Is Derived' attribute. The default value is "false". If
      * isDerived is true, the value of the attribute is derived from information elsewhere.
      * Specifies whether the Property is derived, i.e., whether its value or values can be computed
      * from other information.
      * @return (boolean)handleIsDerived()
      */
     public final boolean isDerived()
     {
         boolean derived6a = this.__derived6a;
         if (!this.__derived6aSet)
         {
             // derived has no pre constraints
             derived6a = handleIsDerived();
             // derived has no post constraints
             this.__derived6a = derived6a;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__derived6aSet = true;
             }
         }
         return derived6a;
     }
 
    /**
     * @see AssociationFacade#isBinary()
     * @return boolean
     */
     protected abstract boolean handleIsBinary();
 
     private boolean __binary7a;
     private boolean __binary7aSet = false;
 
     /**
      * UML2: Determines whether this association is a binary association, i.e. whether it has
      * exactly two member ends. UML2 allows association classes in the association itself (many2many
      * with association attributes). Default=true: only two member ends.
      * @return (boolean)handleIsBinary()
      */
     public final boolean isBinary()
     {
         boolean binary7a = this.__binary7a;
         if (!this.__binary7aSet)
         {
             // binary has no pre constraints
             binary7a = handleIsBinary();
             // binary has no post constraints
             this.__binary7a = binary7a;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__binary7aSet = true;
             }
         }
         return binary7a;
     }
 
     // ------------- associations ------------------
 
     /**
      * The association owning this association end.
      * @return (List<AssociationEndFacade>)handleGetAssociationEnds()
      */
     public final List<AssociationEndFacade> getAssociationEnds()
     {
         List<AssociationEndFacade> getAssociationEnds1r = null;
         // association has no pre constraints
         List result = handleGetAssociationEnds();
         List shieldedResult = this.shieldedElements(result);
         try
         {
             getAssociationEnds1r = (List<AssociationEndFacade>)shieldedResult;
         }
         catch (ClassCastException ex)
         {
             // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
             AssociationFacadeLogic.logger.warn("incorrect metafacade cast for AssociationFacadeLogic.getAssociationEnds List<AssociationEndFacade> " + result + ": " + shieldedResult);
         }
         // association has no post constraints
         return getAssociationEnds1r;
     }
 
     /**
      * UML Specific type is returned in Collection, transformed by shieldedElements to AndroMDA Metafacade type
      * @return  List
      */
     protected abstract List handleGetAssociationEnds();
 
     private AssociationEndFacade __getAssociationEndA2r;
     private boolean __getAssociationEndA2rSet = false;
 
     /**
      * An association describes a set of tuples whose values refer to typed instances. An instance
      * of an
      * association is called a link.
      * @return (AssociationEndFacade)handleGetAssociationEndA()
      */
     public final AssociationEndFacade getAssociationEndA()
     {
         AssociationEndFacade getAssociationEndA2r = this.__getAssociationEndA2r;
         if (!this.__getAssociationEndA2rSet)
         {
             // associationFacade has no pre constraints
             Object result = handleGetAssociationEndA();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getAssociationEndA2r = (AssociationEndFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 AssociationFacadeLogic.logger.warn("incorrect metafacade cast for AssociationFacadeLogic.getAssociationEndA AssociationEndFacade " + result + ": " + shieldedResult);
             }
             // associationFacade has no post constraints
             this.__getAssociationEndA2r = getAssociationEndA2r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getAssociationEndA2rSet = true;
             }
         }
         return getAssociationEndA2r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetAssociationEndA();
 
     private AssociationEndFacade __getAssociationEndB3r;
     private boolean __getAssociationEndB3rSet = false;
 
     /**
      * An association describes a set of tuples whose values refer to typed instances. An instance
      * of an
      * association is called a link.
      * @return (AssociationEndFacade)handleGetAssociationEndB()
      */
     public final AssociationEndFacade getAssociationEndB()
     {
         AssociationEndFacade getAssociationEndB3r = this.__getAssociationEndB3r;
         if (!this.__getAssociationEndB3rSet)
         {
             // associationFacade has no pre constraints
             Object result = handleGetAssociationEndB();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getAssociationEndB3r = (AssociationEndFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 AssociationFacadeLogic.logger.warn("incorrect metafacade cast for AssociationFacadeLogic.getAssociationEndB AssociationEndFacade " + result + ": " + shieldedResult);
             }
             // associationFacade has no post constraints
             this.__getAssociationEndB3r = getAssociationEndB3r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getAssociationEndB3rSet = true;
             }
         }
         return getAssociationEndB3r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetAssociationEndB();
 
     /**
      * @param validationMessages Collection<ModelValidationMessage>
      * @see GeneralizableElementFacadeLogicImpl#validateInvariants(Collection validationMessages)
      */
     @Override
     public void validateInvariants(Collection<ModelValidationMessage> validationMessages)
     {
         super.validateInvariants(validationMessages);
     }
 }