package org.andromda.core.repository;
   
   import org.andromda.core.common.ClassUtils;
   import org.andromda.core.namespace.BaseNamespaceComponent;
   
   /**
    * Represents the repository namespace component.  This is what
    * configures a repository instance.
    *
   * @author Chad Brandon
   */
  public class Repository
      extends BaseNamespaceComponent
  {
      /**
       * Stores the repository facade implementation.
       */
      private RepositoryFacade implementation = null;
  
      /**
       * Sets the implementation class name.
       *
       * @param implementationClass the implementation class.
       */
      public void setImplementationClass(final String implementationClass)
      {
          final Class type = ClassUtils.loadClass(implementationClass);
          if (!RepositoryFacade.class.isAssignableFrom(type))
          {
              throw new RepositoryException(
                  "Implementation '" + implementationClass + "' must be an instance of '" +
                  RepositoryFacade.class.getName() + '\'');
          }
          implementation = (RepositoryFacade)ClassUtils.newInstance(type);
      }
  
      /**
       * Gets the repository implementation.
       *
       * @return the repository implementation.
       */
      public RepositoryFacade getImplementation()
      {
          return this.implementation;
      }
  }