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