package org.andromda.cartridges.ejb.metafacades;
   
   import java.util.Collection;
   import org.andromda.cartridges.ejb.EJBProfile;
   import org.andromda.metafacades.uml.AttributeFacade;
   
   /**
    * Metaclass facade implementation.
    */
  public class EJBPrimaryKeyFacadeLogicImpl
          extends EJBPrimaryKeyFacadeLogic
  {
      private static final long serialVersionUID = 34L;
      // ---------------- constructor -------------------------------
  
      /**
       * @param metaObject
       * @param context
       */
      public EJBPrimaryKeyFacadeLogicImpl(Object metaObject, String context)
      {
          super(metaObject, context);
      }
  
      /**
       * @see org.andromda.cartridges.ejb.metafacades.EJBPrimaryKeyFacadeLogic#handleIsComplex()
       */
      protected boolean handleIsComplex()
      {
          return getSimplePkField() == null;
      }
  
      /**
       * If this <code>object</code> does not have a complex primary key, get the (unqiue) attribute that is used as the
       * primary key.
       *
       * @return the attribute used as primary key, or <code>null</code> if there is none or the class has a complex
       *         primary key.
       */
      private AttributeFacade getSimplePkField()
      {
          AttributeFacade primaryKey = null;
          Collection primaryKeys = ((EJBEntityFacade)this.getOwner()).getIdentifiers();
          if (primaryKeys.size() == 1)
          {
              AttributeFacade pkField = (AttributeFacade)primaryKeys.iterator().next();
              if (pkField.hasStereotype(EJBProfile.STEREOTYPE_IDENTIFIER))
              {
                  primaryKey = pkField;
              }
          }
          return primaryKey;
      }
  
      // ------------- relations ------------------
  
  }