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.modify;
021
022import java.lang.reflect.Method;
023import java.util.Collection;
024import java.util.Collections;
025import java.util.List;
026
027import org.apache.isis.applib.DomainObjectContainer;
028import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
029import org.apache.isis.core.metamodel.adapter.ObjectDirtier;
030import org.apache.isis.core.metamodel.adapter.util.AdapterInvokeUtils;
031import org.apache.isis.core.metamodel.adapter.util.AdapterUtils;
032import org.apache.isis.core.metamodel.facetapi.FacetHolder;
033import org.apache.isis.core.metamodel.facets.ImperativeFacet;
034import org.apache.isis.core.metamodel.facets.collections.modify.CollectionAddToFacetAbstract;
035
036public class CollectionAddToFacetViaAccessor extends CollectionAddToFacetAbstract implements ImperativeFacet {
037
038    private final Method method;
039    private final ObjectDirtier objectDirtier;
040
041    public CollectionAddToFacetViaAccessor(final Method method, final FacetHolder holder, final ObjectDirtier objectDirtier) {
042        super(holder);
043        this.method = method;
044        this.objectDirtier = objectDirtier;
045    }
046
047    /**
048     * Returns a singleton list of the {@link Method} provided in the
049     * constructor.
050     */
051    @Override
052    public List<Method> getMethods() {
053        return Collections.singletonList(method);
054    }
055
056    @Override
057    public Intent getIntent(final Method method) {
058        return Intent.MODIFY_COLLECTION_ADD;
059    }
060
061    @Override
062    public boolean impliesResolve() {
063        return true;
064    }
065
066    /**
067     * Bytecode cannot automatically call
068     * {@link DomainObjectContainer#objectChanged(Object)} because cannot
069     * distinguish whether interacting with accessor to read it or to modify its
070     * contents.
071     */
072    @Override
073    public boolean impliesObjectChanged() {
074        return false;
075    }
076
077    @Override
078    public void add(final ObjectAdapter owningAdapter, final ObjectAdapter elementAdapter) {
079        @SuppressWarnings("unchecked")
080        final Collection<? super Object> collection = (Collection<? super Object>) AdapterInvokeUtils.invoke(method, owningAdapter);
081        final Object elementPojo = AdapterUtils.unwrap(elementAdapter);
082        collection.add(elementPojo);
083        getObjectDirtier().objectChanged(owningAdapter);
084    }
085
086    @Override
087    protected String toStringValues() {
088        return "method=" + method;
089    }
090
091    // /////////////////////////////////////////////////////
092    // Dependencies
093    // /////////////////////////////////////////////////////
094
095    protected ObjectDirtier getObjectDirtier() {
096        return objectDirtier;
097    }
098}