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.param.defaults.methodnum;
021
022import java.lang.reflect.Method;
023import java.util.Collections;
024import java.util.List;
025
026import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
027import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
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.progmodel.facets.param.defaults.ActionParameterDefaultsFacetAbstract;
033
034public class ActionParameterDefaultsFacetViaMethod extends ActionParameterDefaultsFacetAbstract implements ImperativeFacet {
035
036    private final Method method;
037    private final AdapterManager adapterManager;
038
039    public ActionParameterDefaultsFacetViaMethod(final Method method, final FacetHolder holder, final AdapterManager adapterManager) {
040        super(holder);
041        this.method = method;
042        this.adapterManager = adapterManager;
043    }
044
045    /**
046     * Returns a singleton list of the {@link Method} provided in the
047     * constructor.
048     */
049    @Override
050    public List<Method> getMethods() {
051        return Collections.singletonList(method);
052    }
053
054    @Override
055    public Intent getIntent(final Method method) {
056        return Intent.DEFAULTS;
057    }
058
059    @Override
060    public boolean impliesResolve() {
061        return true;
062    }
063
064    @Override
065    public boolean impliesObjectChanged() {
066        return false;
067    }
068
069    @Override
070    public Object getDefault(final ObjectAdapter target, List<ObjectAdapter> argumentsIfAvailable) {
071        return AdapterInvokeUtils.invokeAutofit(method, target, argumentsIfAvailable, getAdapterManager());
072    }
073
074
075
076    @Override
077    protected String toStringValues() {
078        return "method=" + method;
079    }
080
081    // /////////////////////////////////////////////////////////
082    // Dependencies
083    // /////////////////////////////////////////////////////////
084
085    protected AdapterManager getAdapterManager() {
086        return adapterManager;
087    }
088
089}