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    
020    package org.apache.isis.core.progmodel.facets.object.defaults.annotation;
021    
022    import org.apache.isis.applib.annotation.Defaulted;
023    import org.apache.isis.core.commons.config.IsisConfiguration;
024    import org.apache.isis.core.commons.lang.StringUtils;
025    import org.apache.isis.core.metamodel.facetapi.FacetHolder;
026    import org.apache.isis.core.metamodel.runtimecontext.DependencyInjector;
027    import org.apache.isis.core.progmodel.facets.object.defaults.DefaultedFacetAbstract;
028    import org.apache.isis.core.progmodel.facets.object.defaults.DefaultsProviderUtil;
029    
030    public class DefaultedFacetAnnotation extends DefaultedFacetAbstract {
031    
032        private static String providerName(final Class<?> annotatedClass, final IsisConfiguration configuration) {
033            final Defaulted annotation = annotatedClass.getAnnotation(Defaulted.class);
034            final String providerName = annotation.defaultsProviderName();
035            if (!StringUtils.isNullOrEmpty(providerName)) {
036                return providerName;
037            }
038            return DefaultsProviderUtil.defaultsProviderNameFromConfiguration(annotatedClass, configuration);
039        }
040    
041        private static Class<?> providerClass(final Class<?> annotatedClass) {
042            final Defaulted annotation = annotatedClass.getAnnotation(Defaulted.class);
043            return annotation.defaultsProviderClass();
044        }
045    
046        public DefaultedFacetAnnotation(final Class<?> annotatedClass, final IsisConfiguration configuration,
047            final FacetHolder holder, final DependencyInjector dependencyInjector) {
048            this(providerName(annotatedClass, configuration), providerClass(annotatedClass), holder, dependencyInjector);
049        }
050    
051        private DefaultedFacetAnnotation(final String candidateProviderName, final Class<?> candidateProviderClass,
052            final FacetHolder holder, final DependencyInjector dependencyInjector) {
053            super(candidateProviderName, candidateProviderClass, holder, dependencyInjector);
054        }
055    
056    }