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.choices.enums;
021
022import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
023import org.apache.isis.core.metamodel.facetapi.FacetHolder;
024import org.apache.isis.core.metamodel.facets.FacetedMethod;
025import org.apache.isis.core.metamodel.facets.choices.ChoicesFacet;
026import org.apache.isis.core.metamodel.spec.ObjectSpecification;
027import org.apache.isis.core.metamodel.spec.SpecificationLoader;
028import org.apache.isis.core.progmodel.facets.properties.choices.PropertyChoicesFacetAbstract;
029
030public class PropertyChoicesFacetDerivedFromChoicesFacet extends PropertyChoicesFacetAbstract {
031
032    public PropertyChoicesFacetDerivedFromChoicesFacet(final FacetHolder holder, final SpecificationLoader specificationLookup) {
033        super(holder, specificationLookup);
034    }
035
036    @Override
037    public Object[] getChoices(final ObjectAdapter adapter, final SpecificationLoader specificationLookup) {
038        final FacetHolder facetHolder = getFacetHolder();
039        final FacetedMethod noap = (FacetedMethod) facetHolder;
040        final ObjectSpecification noSpec = getSpecification(noap.getType());
041        final ChoicesFacet choicesFacet = noSpec.getFacet(ChoicesFacet.class);
042        if (choicesFacet == null) {
043            return new Object[0];
044        }
045        return choicesFacet.getChoices(adapter);
046    }
047
048    public ObjectSpecification getSpecification(final Class<?> type) {
049        return type == null ? null : getSpecificationLoader().loadSpecification(type);
050    }
051
052}