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.choices.enums;
021
022import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
023import org.apache.isis.core.metamodel.adapter.mgr.AdapterManagerAware;
024import org.apache.isis.core.metamodel.facetapi.FacetUtil;
025import org.apache.isis.core.metamodel.facetapi.FeatureType;
026import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
027import org.apache.isis.core.metamodel.facets.FacetedMethodParameter;
028import org.apache.isis.core.metamodel.facets.choices.ChoicesFacet;
029import org.apache.isis.core.metamodel.facets.param.choices.ActionParameterChoicesFacet;
030
031public class ParameterChoicesFacetDerivedFromChoicesFacetFacetFactory extends FacetFactoryAbstract implements AdapterManagerAware {
032
033    private AdapterManager adapterManager;
034
035    public ParameterChoicesFacetDerivedFromChoicesFacetFacetFactory() {
036        super(FeatureType.PARAMETERS_ONLY);
037    }
038
039    @Override
040    public void processParams(final ProcessParameterContext processParameterContext) {
041        final Class<?> paramType = processParameterContext.getMethod().getParameterTypes()[processParameterContext.getParamNum()];
042
043        if(!getSpecificationLoader().loadSpecification(paramType).containsDoOpFacet(ChoicesFacet.class)) {
044            return;
045        }
046        
047        // don't trample over any existing facets.
048        final FacetedMethodParameter facetHolder = processParameterContext.getFacetHolder();
049        if(facetHolder.containsDoOpFacet(ActionParameterChoicesFacet.class)) {
050            return;
051        }
052        
053        FacetUtil.addFacet(new ActionParameterChoicesFacetDerivedFromChoicesFacet(facetHolder, getSpecificationLoader(), getAdapterManager()));
054    }
055
056    // /////////////////////////////////////////////
057    // Injected
058    // /////////////////////////////////////////////
059
060    protected AdapterManager getAdapterManager() {
061        return adapterManager;
062    }
063
064    @Override
065    public void setAdapterManager(final AdapterManager adapterManager) {
066        this.adapterManager = adapterManager;
067    }
068}