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.ImperativeFacet.Intent;
035import org.apache.isis.core.metamodel.facets.collections.modify.CollectionRemoveFromFacetAbstract;
036
037public class CollectionRemoveFromFacetViaAccessor extends CollectionRemoveFromFacetAbstract implements ImperativeFacet {
038
039    private final Method method;
040    private final ObjectDirtier objectDirtier;
041
042    public CollectionRemoveFromFacetViaAccessor(final Method method, final FacetHolder holder, final ObjectDirtier objectDirtier) {
043        super(holder);
044        this.method = method;
045        this.objectDirtier = objectDirtier;
046    }
047
048    /**
049     * Returns a singleton list of the {@link Method} provided in the
050     * constructor.
051     */
052    @Override
053    public List<Method> getMethods() {
054        return Collections.singletonList(method);
055    }
056
057    @Override
058    public Intent getIntent(final Method method) {
059        return Intent.MODIFY_COLLECTION_REMOVE;
060    }
061
062    @Override
063    public boolean impliesResolve() {
064        return true;
065    }
066
067    /**
068     * Bytecode cannot automatically call
069     * {@link DomainObjectContainer#objectChanged(Object)} because cannot
070     * distinguish whether interacting with accessor to read it or to modify its
071     * contents.
072     */
073    @Override
074    public boolean impliesObjectChanged() {
075        return false;
076    }
077
078    @Override
079    public void remove(final ObjectAdapter owningAdapter, final ObjectAdapter elementAdapter) {
080        @SuppressWarnings("unchecked")
081        final Collection<? super Object> collection = (Collection<? super Object>) AdapterInvokeUtils.invoke(method, owningAdapter);
082        collection.remove(AdapterUtils.unwrap(elementAdapter));
083        getObjectDirtier().objectChanged(owningAdapter);
084    }
085
086    @Override
087    protected String toStringValues() {
088        return "method=" + method;
089    }
090
091    // /////////////////////////////////////////////////////////
092    // Dependencies (from constructor)
093    // /////////////////////////////////////////////////////////
094
095    protected ObjectDirtier getObjectDirtier() {
096        return objectDirtier;
097    }
098
099}