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.properties.accessor;
021    
022    import java.lang.reflect.Method;
023    import java.util.Collections;
024    import java.util.List;
025    
026    import org.apache.isis.applib.DomainObjectContainer;
027    import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
028    import org.apache.isis.core.metamodel.adapter.util.AdapterInvokeUtils;
029    import org.apache.isis.core.metamodel.facetapi.FacetHolder;
030    import org.apache.isis.core.metamodel.facets.ImperativeFacet;
031    import org.apache.isis.core.metamodel.facets.accessor.PropertyOrCollectionAccessorFacetAbstract;
032    
033    public class PropertyAccessorFacetViaAccessor extends PropertyOrCollectionAccessorFacetAbstract implements
034        ImperativeFacet {
035    
036        private final Method method;
037    
038        public PropertyAccessorFacetViaAccessor(final Method method, final FacetHolder holder) {
039            super(holder);
040            this.method = method;
041        }
042    
043        /**
044         * Returns a singleton list of the {@link Method} provided in the constructor.
045         */
046        @Override
047        public List<Method> getMethods() {
048            return Collections.singletonList(method);
049        }
050    
051        @Override
052        public boolean impliesResolve() {
053            return true;
054        }
055    
056        /**
057         * Bytecode cannot automatically call {@link DomainObjectContainer#objectChanged(Object)} because cannot distinguish
058         * whether interacting with accessor to read it or to modify its contents.
059         */
060        @Override
061        public boolean impliesObjectChanged() {
062            return false;
063        }
064    
065        @Override
066        public Object getProperty(final ObjectAdapter owningAdapter) {
067            return AdapterInvokeUtils.invoke(method, owningAdapter);
068        }
069    
070        @Override
071        protected String toStringValues() {
072            return "method=" + method;
073        }
074    
075    }