/*
* Copyright 2011 Marc Grue.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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 org.qi4j.sample.dcicargo.sample_b.data.factory;
import java.util.Date;
import org.joda.time.DateMidnight;
import org.qi4j.api.injection.scope.Structure;
import org.qi4j.api.mixin.Mixins;
import org.qi4j.api.service.ServiceComposite;
import org.qi4j.api.value.ValueBuilder;
import org.qi4j.api.value.ValueBuilderFactory;
import org.qi4j.sample.dcicargo.sample_b.data.factory.exception.CannotCreateRouteSpecificationException;
import org.qi4j.sample.dcicargo.sample_b.data.structure.cargo.RouteSpecification;
import org.qi4j.sample.dcicargo.sample_b.data.structure.location.Location;
/**
* Route Specification factory
*
* Enforces 3 invariants:
* - no identical origin and destination
* - deadline in the future
* - earliest departure before deadline
*
* Validation of Locations is considered out of this scope.
*/
@Mixins( RouteSpecificationFactoryService.Mixin.class )
public interface RouteSpecificationFactoryService
extends ServiceComposite
{
RouteSpecification build( Location origin, Location destination, Date earliestDeparture, Date deadline )
throws CannotCreateRouteSpecificationException;
abstract class Mixin
implements RouteSpecificationFactoryService
{
@Structure
ValueBuilderFactory vbf;
public RouteSpecification build( Location origin, Location destination, Date earliestDeparture, Date deadline )
throws CannotCreateRouteSpecificationException
{
if( origin == destination )
{
throw new CannotCreateRouteSpecificationException( "Origin location can't be same as destination location." );
}
Date endOfToday = new DateMidnight().plusDays( 1 ).toDate();
if( deadline.before( endOfToday ) )
{
throw new CannotCreateRouteSpecificationException( "Arrival deadline is in the past or Today." +
"\nDeadline " + deadline +
"\nToday (midnight) " + endOfToday );
}
if( deadline.before( earliestDeparture ) )
{
throw new CannotCreateRouteSpecificationException( "Deadline can't be before departure:" +
"\nDeparture " + earliestDeparture +
"\nDeadline " + deadline );
}
ValueBuilder<RouteSpecification> routeSpec = vbf.newValueBuilder( RouteSpecification.class );
routeSpec.prototype().origin().set( origin );
routeSpec.prototype().destination().set( destination );
routeSpec.prototype().earliestDeparture().set( earliestDeparture );
routeSpec.prototype().arrivalDeadline().set( deadline );
return routeSpec.newInstance();
}
}
}