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.multiline.annotation;
021
022import java.util.Properties;
023
024import org.apache.isis.applib.annotation.MultiLine;
025import org.apache.isis.core.metamodel.facetapi.FacetHolder;
026import org.apache.isis.core.metamodel.facetapi.FacetUtil;
027import org.apache.isis.core.metamodel.facetapi.FeatureType;
028import org.apache.isis.core.metamodel.facets.Annotations;
029import org.apache.isis.core.metamodel.facets.ContributeeMemberFacetFactory;
030import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
031import org.apache.isis.core.metamodel.facets.multiline.MultiLineFacet;
032
033public class MultiLineOnPropertyFacetFactory extends FacetFactoryAbstract implements ContributeeMemberFacetFactory {
034
035    public MultiLineOnPropertyFacetFactory() {
036        super(FeatureType.PROPERTIES_ONLY);
037    }
038
039    @Override
040    public void process(final ProcessMethodContext processMethodContext) {
041        MultiLineFacet facet = createFromMetadataPropertiesIfPossible(processMethodContext);
042        if(facet == null) {
043            facet = createFromAnnotationIfPossible(processMethodContext);
044        }
045        
046        // no-op if null
047        FacetUtil.addFacet(facet);
048    }
049
050    @Override
051    public void process(ProcessContributeeMemberContext processMemberContext) {
052        
053    }
054    
055    private static MultiLineFacet createFromMetadataPropertiesIfPossible(
056            final ProcessContextWithMetadataProperties<? extends FacetHolder> pcwmp) {
057        
058        final FacetHolder holder = pcwmp.getFacetHolder();
059        
060        final Properties properties = pcwmp.metadataProperties("multiLine");
061        return properties != null ? new MultiLineFacetOnPropertyFromProperties(properties, holder) : null;
062    }
063
064    private static MultiLineFacetOnPropertyAnnotation createFromAnnotationIfPossible(final ProcessMethodContext processMethodContext) {
065        final Class<?> returnType = processMethodContext.getMethod().getReturnType();
066        if (!Annotations.isString(returnType)) {
067            return null;
068        }
069        final MultiLine annotation = Annotations.getAnnotation(processMethodContext.getMethod(), MultiLine.class);
070        return (annotation != null) ? new MultiLineFacetOnPropertyAnnotation(annotation.numberOfLines(), annotation.preventWrapping(), processMethodContext.getFacetHolder()) : null;
071    }
072
073
074}