Delegatable.java

/**
 *
 * Copyright
 * 2009-2015 Jayway Products AB
 * 2016-2017 Föreningen Sambruk
 *
 * Licensed under AGPL, Version 3.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.gnu.org/licenses/agpl.txt
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package se.streamsource.streamflow.web.domain.interaction.gtd;

import java.util.Date;

import org.qi4j.api.common.Optional;
import org.qi4j.api.entity.association.Association;
import org.qi4j.api.injection.scope.This;
import org.qi4j.api.mixin.Mixins;
import org.qi4j.api.property.Property;

import se.streamsource.streamflow.infrastructure.event.domain.DomainEvent;

/**
 * JAVADOC
 */
@Mixins(Delegatable.Mixin.class)
public interface Delegatable
{
   void delegateTo( Delegatee delegatee, Delegator delegator, Owner delegatedFrom );

   void rejectDelegation();

   void cancelDelegation();

   boolean isDelegated();

   boolean isDelegatedBy(Delegator delegator);

   boolean isDelegatedTo(Delegatee delegatee);

   interface Data
   {
      @Optional
      Association<Delegatee> delegatedTo();

      @Optional
      Association<Delegator> delegatedBy();

      @Optional
      Association<Owner> delegatedFrom();

      @Optional
      Property<Date> delegatedOn();

      void delegatedTo( @Optional DomainEvent create, Delegatee delegatee, Delegator delegator, Owner delegatedFrom );

      void rejectedDelegation( @Optional DomainEvent event );

      void cancelledDelegation( @Optional DomainEvent event );
   }

   abstract class Mixin
         implements Delegatable, Data
   {
      @This
      Ownable ownable;

      @This
      Status status;

      public void delegateTo( Delegatee delegatee, Delegator delegator, Owner delegatedFrom )
      {
         delegatedTo( null, delegatee, delegator, delegatedFrom );
      }

      public void delegatedTo( @Optional DomainEvent event, Delegatee delegatee, Delegator delegator, Owner delegatedFrom )
      {
         delegatedTo().set( delegatee );
         delegatedBy().set( delegator );
         delegatedOn().set( event.on().get() );
         delegatedFrom().set( delegatedFrom );
//         status.delegate();
      }

      public void rejectDelegation()
      {
         if (delegatedTo().get() != null)
         {
            ownable.changeOwner( delegatedFrom().get() );
            rejectedDelegation( null );
         }
      }

      public void cancelDelegation()
      {
         if (delegatedTo().get() != null)
         {
            ownable.changeOwner( delegatedFrom().get() );
            cancelledDelegation( null );
         }
      }

      public boolean isDelegated()
      {
         return delegatedTo().get() != null;
      }

      public boolean isDelegatedBy( Delegator delegator )
      {
         return delegator.equals( delegatedBy().get());
      }

      public boolean isDelegatedTo( Delegatee delegatee )
      {
         Delegatee delegatedTo = delegatedTo().get();

         if (delegatedTo != null)
         {
            return delegatedTo.isDelegatedTo( delegatee );
         } else
            return false;
      }

      public void rejectedDelegation( @Optional DomainEvent event )
      {
         delegatedTo().set( null );
         delegatedBy().set( null );
         delegatedOn().set( null );
         delegatedFrom().set( null );
         status.reopen();
      }

      public void cancelledDelegation( @Optional DomainEvent event )
      {
         delegatedTo().set( null );
         delegatedBy().set( null );
         delegatedOn().set( null );
         delegatedFrom().set( null );
      }
   }
}