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
020 package org.apache.isis.core.progmodel.facets.collections.modify;
021
022 import java.lang.reflect.Method;
023 import java.util.Collection;
024 import java.util.Collections;
025 import java.util.List;
026
027 import org.apache.isis.applib.DomainObjectContainer;
028 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
029 import org.apache.isis.core.metamodel.adapter.ObjectDirtier;
030 import org.apache.isis.core.metamodel.adapter.util.AdapterInvokeUtils;
031 import org.apache.isis.core.metamodel.adapter.util.AdapterUtils;
032 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
033 import org.apache.isis.core.metamodel.facets.ImperativeFacet;
034 import org.apache.isis.core.metamodel.facets.collections.modify.CollectionAddToFacetAbstract;
035
036 public 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,
042 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 constructor.
050 */
051 @Override
052 public List<Method> getMethods() {
053 return Collections.singletonList(method);
054 }
055
056 @Override
057 public boolean impliesResolve() {
058 return true;
059 }
060
061 /**
062 * Bytecode cannot automatically call {@link DomainObjectContainer#objectChanged(Object)} because cannot distinguish
063 * whether interacting with accessor to read it or to modify its contents.
064 */
065 @Override
066 public boolean impliesObjectChanged() {
067 return false;
068 }
069
070 @Override
071 public void add(final ObjectAdapter owningAdapter, final ObjectAdapter elementAdapter) {
072 final Collection collection = (Collection) AdapterInvokeUtils.invoke(method, owningAdapter);
073 collection.add(AdapterUtils.unwrap(elementAdapter));
074 getObjectDirtier().objectChanged(owningAdapter);
075 }
076
077 @Override
078 protected String toStringValues() {
079 return "method=" + method;
080 }
081
082 // /////////////////////////////////////////////////////
083 // Dependencies
084 // /////////////////////////////////////////////////////
085
086 protected ObjectDirtier getObjectDirtier() {
087 return objectDirtier;
088 }
089 }