// 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.AttributeFacade;
  import org.andromda.metafacades.uml.AttributeLinkFacade;
  import org.andromda.metafacades.uml.InstanceFacade;
  import org.apache.log4j.Logger;
  import org.omg.uml.behavioralelements.commonbehavior.AttributeLink;
  
  /**
   * 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 AttributeLinkFacade
   *
   * @see AttributeLinkFacade
   */
  public abstract class AttributeLinkFacadeLogic
      extends ModelElementFacadeLogicImpl
      implements AttributeLinkFacade
  {
      /**
       * The underlying UML object
       * @see AttributeLink
       */
      protected AttributeLink metaObject;
  
      /** Create Metafacade implementation instance using the MetafacadeFactory from the context
       * @param metaObjectIn
       * @param context
       */
      protected AttributeLinkFacadeLogic(AttributeLink metaObjectIn, String context)
      {
          super(metaObjectIn, getContext(context));
          this.metaObject = metaObjectIn;
      }
  
      /**
       * The logger instance.
       */
      private static final Logger logger = Logger.getLogger(AttributeLinkFacadeLogic.class);
  
      /**
       * Gets the context for this metafacade logic instance.
       * @param context String. Set to AttributeLinkFacade if null
       * @return context String
       */
      private static String getContext(String context)
      {
          if (context == null)
          {
              context = "org.andromda.metafacades.uml.AttributeLinkFacade";
          }
          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 AttributeLinkFacade
       */
      public boolean isAttributeLinkFacadeMetaType()
      {
          return true;
      }
  
      // ------------- associations ------------------
  
      private Collection<InstanceFacade> __getValues1r;
      private boolean __getValues1rSet = false;
  
      /**
       * All slots for this instance, this includes the ones that map onto attributes and the ones
       * that map onto association ends. In fact, this feature holds the collection of both
       * InstanceFacade.attributeLinks and InstanceFacade.linkEnds.
       * @return (Collection<InstanceFacade>)handleGetValues()
       */
      public final Collection<InstanceFacade> getValues()
      {
          Collection<InstanceFacade> getValues1r = this.__getValues1r;
          if (!this.__getValues1rSet)
         {
             // slots has no pre constraints
             Collection result = handleGetValues();
             List shieldedResult = this.shieldedElements(result);
             try
             {
                 getValues1r = (Collection<InstanceFacade>)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 AttributeLinkFacadeLogic.logger.warn("incorrect metafacade cast for AttributeLinkFacadeLogic.getValues Collection<InstanceFacade> " + result + ": " + shieldedResult);
             }
             // slots has no post constraints
             this.__getValues1r = getValues1r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getValues1rSet = true;
             }
         }
         return getValues1r;
     }
 
     /**
      * UML Specific type is returned in Collection, transformed by shieldedElements to AndroMDA Metafacade type
      * @return  Collection
      */
     protected abstract Collection handleGetValues();
 
     private InstanceFacade __getInstance2r;
     private boolean __getInstance2rSet = false;
 
     /**
      * Returns those slots that map onto attributes.
      * @return (InstanceFacade)handleGetInstance()
      */
     public final InstanceFacade getInstance()
     {
         InstanceFacade getInstance2r = this.__getInstance2r;
         if (!this.__getInstance2rSet)
         {
             // attributeLinks has no pre constraints
             Object result = handleGetInstance();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getInstance2r = (InstanceFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 AttributeLinkFacadeLogic.logger.warn("incorrect metafacade cast for AttributeLinkFacadeLogic.getInstance InstanceFacade " + result + ": " + shieldedResult);
             }
             // attributeLinks has no post constraints
             this.__getInstance2r = getInstance2r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getInstance2rSet = true;
             }
         }
         return getInstance2r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetInstance();
 
     private InstanceFacade __getValue3r;
     private boolean __getValue3rSet = false;
 
     /**
      * 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 (InstanceFacade)handleGetValue()
      */
     public final InstanceFacade getValue()
     {
         InstanceFacade getValue3r = this.__getValue3r;
         if (!this.__getValue3rSet)
         {
             // attributeLinkFacade has no pre constraints
             Object result = handleGetValue();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getValue3r = (InstanceFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 AttributeLinkFacadeLogic.logger.warn("incorrect metafacade cast for AttributeLinkFacadeLogic.getValue InstanceFacade " + result + ": " + shieldedResult);
             }
             // attributeLinkFacade has no post constraints
             this.__getValue3r = getValue3r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getValue3rSet = true;
             }
         }
         return getValue3r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetValue();
 
     private AttributeFacade __getAttribute4r;
     private boolean __getAttribute4rSet = false;
 
     /**
      * 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 (AttributeFacade)handleGetAttribute()
      */
     public final AttributeFacade getAttribute()
     {
         AttributeFacade getAttribute4r = this.__getAttribute4r;
         if (!this.__getAttribute4rSet)
         {
             // attributeLinkFacade has no pre constraints
             Object result = handleGetAttribute();
             MetafacadeBase shieldedResult = this.shieldedElement(result);
             try
             {
                 getAttribute4r = (AttributeFacade)shieldedResult;
             }
             catch (ClassCastException ex)
             {
                 // Bad things happen if the metafacade type mapping in metafacades.xml is wrong - Warn
                 AttributeLinkFacadeLogic.logger.warn("incorrect metafacade cast for AttributeLinkFacadeLogic.getAttribute AttributeFacade " + result + ": " + shieldedResult);
             }
             // attributeLinkFacade has no post constraints
             this.__getAttribute4r = getAttribute4r;
             if (isMetafacadePropertyCachingEnabled())
             {
                 this.__getAttribute4rSet = true;
             }
         }
         return getAttribute4r;
     }
 
     /**
      * UML Specific type is transformed by shieldedElements to AndroMDA Metafacade type
      * @return Object
      */
     protected abstract Object handleGetAttribute();
 
     /**
      * @param validationMessages Collection<ModelValidationMessage>
      * @see ModelElementFacadeLogicImpl#validateInvariants(Collection validationMessages)
      */
     @Override
     public void validateInvariants(Collection<ModelValidationMessage> validationMessages)
     {
         super.validateInvariants(validationMessages);
     }
 }