001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019
020package org.apache.isis.core.progmodel.facets.collections.event;
021
022import java.lang.reflect.Method;
023
024import org.apache.isis.applib.annotation.PostsCollectionRemovedFromEvent;
025import org.apache.isis.applib.services.eventbus.CollectionRemovedFromEvent;
026import org.apache.isis.core.metamodel.adapter.ServicesProvider;
027import org.apache.isis.core.metamodel.adapter.ServicesProviderAware;
028import org.apache.isis.core.metamodel.facetapi.FacetHolder;
029import org.apache.isis.core.metamodel.facetapi.FacetUtil;
030import org.apache.isis.core.metamodel.facetapi.FeatureType;
031import org.apache.isis.core.metamodel.facets.Annotations;
032import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
033import org.apache.isis.core.metamodel.facets.accessor.PropertyOrCollectionAccessorFacet;
034import org.apache.isis.core.metamodel.facets.collections.event.PostsCollectionRemovedFromEventFacet;
035import org.apache.isis.core.metamodel.facets.collections.modify.CollectionRemoveFromFacet;
036import org.apache.isis.core.metamodel.runtimecontext.ServicesInjector;
037import org.apache.isis.core.metamodel.runtimecontext.ServicesInjectorAware;
038
039public class PostsCollectionRemovedFromEventAnnotationFacetFactory extends FacetFactoryAbstract implements ServicesInjectorAware {
040
041    private ServicesInjector servicesInjector;
042
043    public PostsCollectionRemovedFromEventAnnotationFacetFactory() {
044        super(FeatureType.COLLECTIONS_ONLY);
045    }
046
047    @Override
048    public void process(final ProcessMethodContext processMethodContext) {
049        final Method method = processMethodContext.getMethod();
050        FacetUtil.addFacet(create(method, processMethodContext.getFacetHolder()));
051    }
052
053    private PostsCollectionRemovedFromEventFacet create(Method method, final FacetHolder holder) {
054        final PostsCollectionRemovedFromEvent annotation = Annotations.getAnnotation(method, PostsCollectionRemovedFromEvent.class);
055        if(annotation == null) {
056            return null;
057        }
058        
059        final PropertyOrCollectionAccessorFacet getterFacet = holder.getFacet(PropertyOrCollectionAccessorFacet.class);
060        if(getterFacet == null) {
061            return null;
062        } 
063        final CollectionRemoveFromFacet collectionRemoveFromFacet = holder.getFacet(CollectionRemoveFromFacet.class);
064        if(collectionRemoveFromFacet == null) {
065            return null;
066        }
067        // the collectionRemoveFromFacet will end up as the underlying facet of the PostsCollectionRemovedFromEventFacetAnnotation
068
069        final Class<? extends CollectionRemovedFromEvent<?,?>> changedEventType = annotation.value();
070        return new PostsCollectionRemovedFromEventFacetAnnotation(changedEventType, getterFacet, collectionRemoveFromFacet, servicesInjector, holder);
071    }
072
073    // //////////////////////////////////////
074
075    @Override
076    public void setServicesInjector(ServicesInjector servicesInjector) {
077        this.servicesInjector = servicesInjector;
078    }
079
080}