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.properties.accessor;
021
022import java.lang.reflect.Method;
023import java.util.Collections;
024import java.util.List;
025
026import org.apache.isis.applib.DomainObjectContainer;
027import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
028import org.apache.isis.core.metamodel.adapter.util.AdapterInvokeUtils;
029import org.apache.isis.core.metamodel.facetapi.FacetHolder;
030import org.apache.isis.core.metamodel.facets.ImperativeFacet;
031import org.apache.isis.core.metamodel.facets.ImperativeFacet.Intent;
032import org.apache.isis.core.metamodel.facets.accessor.PropertyOrCollectionAccessorFacetAbstract;
033
034public class PropertyAccessorFacetViaAccessor extends PropertyOrCollectionAccessorFacetAbstract implements 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
045     * constructor.
046     */
047    @Override
048    public List<Method> getMethods() {
049        return Collections.singletonList(method);
050    }
051
052    @Override
053    public Intent getIntent(final Method method) {
054        return Intent.ACCESSOR;
055    }
056
057    @Override
058    public boolean impliesResolve() {
059        return true;
060    }
061
062    /**
063     * Bytecode cannot automatically call
064     * {@link DomainObjectContainer#objectChanged(Object)} because cannot
065     * distinguish whether interacting with accessor to read it or to modify its
066     * contents.
067     */
068    @Override
069    public boolean impliesObjectChanged() {
070        return false;
071    }
072
073    @Override
074    public Object getProperty(final ObjectAdapter owningAdapter) {
075        return AdapterInvokeUtils.invoke(method, owningAdapter);
076    }
077
078    @Override
079    protected String toStringValues() {
080        return "method=" + method;
081    }
082
083}