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.object.choices.enums;
021
022import org.apache.isis.core.commons.lang.ObjectExtensions;
023import org.apache.isis.core.metamodel.facetapi.FacetHolder;
024import org.apache.isis.core.metamodel.facetapi.FacetUtil;
025import org.apache.isis.core.progmodel.facets.object.value.ValueUsingValueSemanticsProviderFacetFactory;
026
027public class EnumFacetFactory<T extends Enum<T>> extends ValueUsingValueSemanticsProviderFacetFactory<T> {
028
029    public EnumFacetFactory() {
030        super();
031    }
032
033    @Override
034    public void process(final ProcessClassContext processClassContext) {
035        final Class<?> cls = processClassContext.getCls();
036        final FacetHolder holder = processClassContext.getFacetHolder();
037
038        if (!cls.isEnum()) {
039            return;
040        }
041
042        addFacets(new EnumValueSemanticsProvider<T>(holder, asT(cls), getConfiguration(), getContext()));
043        FacetUtil.addFacet(new ChoicesFacetEnum(holder, cls.getEnumConstants()));
044    }
045
046    protected Class<T> asT(final Class<?> cls) {
047        return ObjectExtensions.asT(cls);
048    }
049
050}