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.paged;
021
022import java.util.Properties;
023
024import org.apache.isis.applib.annotation.Paged;
025import org.apache.isis.core.commons.config.IsisConfiguration;
026import org.apache.isis.core.commons.config.IsisConfigurationAware;
027import org.apache.isis.core.metamodel.facetapi.FacetUtil;
028import org.apache.isis.core.metamodel.facetapi.FeatureType;
029import org.apache.isis.core.metamodel.facets.Annotations;
030import org.apache.isis.core.metamodel.facets.ContributeeMemberFacetFactory;
031import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
032import org.apache.isis.core.metamodel.facets.object.paged.PagedFacet;
033
034public class PagedOnParentedCollectionFacetFactory extends FacetFactoryAbstract 
035        implements ContributeeMemberFacetFactory, IsisConfigurationAware {
036
037    private IsisConfiguration configuration;
038
039    public PagedOnParentedCollectionFacetFactory() {
040        super(FeatureType.COLLECTIONS_ONLY);
041    }
042
043    @Override
044    public void process(final ProcessMethodContext processMethodContext) {
045        
046        PagedFacet pagedFacet = createFromMetadataPropertiesIfPossible(processMethodContext);
047        if(pagedFacet == null) {
048            pagedFacet = createFromPagedAnnotationIfPossible(processMethodContext);
049        }
050        // no-op if null
051        FacetUtil.addFacet(pagedFacet);
052    }
053
054    @Override
055    public void process(ProcessContributeeMemberContext processMemberContext) {
056        final PagedFacet pagedFacet = createFromMetadataPropertiesIfPossible(processMemberContext);
057        // no-op if null
058        FacetUtil.addFacet(pagedFacet);
059    }
060
061    private PagedFacet createFromMetadataPropertiesIfPossible(final ProcessContextWithMetadataProperties<?> processMethodContext) {
062        final Properties properties = processMethodContext.metadataProperties("paged");
063        return properties != null ? new PagedFacetProperties(properties, processMethodContext.getFacetHolder()) : null;
064    }
065
066    private PagedFacet createFromPagedAnnotationIfPossible(final ProcessMethodContext processMethodContext) {
067        final Paged annotation = Annotations.getAnnotation(processMethodContext.getMethod(), Paged.class);
068        return annotation != null ? new PagedFacetAnnotation(processMethodContext.getFacetHolder(), annotation.value()) : null;
069    }
070
071
072    // //////////////////////////////////////
073
074    public IsisConfiguration getConfiguration() {
075        return configuration;
076    }
077
078    @Override
079    public void setConfiguration(IsisConfiguration configuration) {
080        this.configuration = configuration;
081    }
082
083
084}