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.callbacks.update;
021    
022    import java.lang.reflect.Method;
023    import java.util.ArrayList;
024    import java.util.List;
025    
026    import org.apache.isis.core.metamodel.facetapi.Facet;
027    import org.apache.isis.core.metamodel.facetapi.FacetHolder;
028    import org.apache.isis.core.metamodel.facetapi.FacetUtil;
029    import org.apache.isis.core.metamodel.facetapi.FeatureType;
030    import org.apache.isis.core.metamodel.methodutils.MethodScope;
031    import org.apache.isis.core.progmodel.facets.MethodFinderUtils;
032    import org.apache.isis.core.progmodel.facets.MethodPrefixBasedFacetFactoryAbstract;
033    import org.apache.isis.core.progmodel.facets.MethodPrefixConstants;
034    
035    public class UpdateCallbackFacetFactory extends MethodPrefixBasedFacetFactoryAbstract {
036    
037        private static final String[] PREFIXES = { MethodPrefixConstants.UPDATED_PREFIX,
038            MethodPrefixConstants.UPDATING_PREFIX, };
039    
040        public UpdateCallbackFacetFactory() {
041            super(FeatureType.OBJECTS_ONLY, PREFIXES);
042        }
043    
044        @Override
045        public void process(final ProcessClassContext processClassContext) {
046            final Class<?> cls = processClassContext.getCls();
047            final FacetHolder facetHolder = processClassContext.getFacetHolder();
048    
049            final List<Facet> facets = new ArrayList<Facet>();
050            final List<Method> methods = new ArrayList<Method>();
051    
052            Method method = null;
053            method =
054                MethodFinderUtils.findMethod(cls, MethodScope.OBJECT, MethodPrefixConstants.UPDATING_PREFIX, void.class,
055                    NO_PARAMETERS_TYPES);
056            if (method != null) {
057                methods.add(method);
058                facets.add(new UpdatingCallbackFacetViaMethod(method, facetHolder));
059            }
060    
061            method =
062                MethodFinderUtils.findMethod(cls, MethodScope.OBJECT, MethodPrefixConstants.UPDATED_PREFIX, void.class,
063                    NO_PARAMETERS_TYPES);
064            if (method != null) {
065                methods.add(method);
066                facets.add(new UpdatedCallbackFacetViaMethod(method, facetHolder));
067            }
068    
069            processClassContext.removeMethods(methods);
070            FacetUtil.addFacets(facets);
071        }
072    
073    }