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.properties.typicallen.fromtype;
021    
022    import org.apache.isis.core.metamodel.facetapi.FacetHolder;
023    import org.apache.isis.core.metamodel.facetapi.FacetUtil;
024    import org.apache.isis.core.metamodel.facetapi.FeatureType;
025    import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
026    import org.apache.isis.core.metamodel.facets.FacetedMethod;
027    import org.apache.isis.core.metamodel.facets.typicallen.TypicalLengthFacet;
028    import org.apache.isis.core.metamodel.spec.ObjectSpecification;
029    
030    public class TypicalLengthFacetForPropertyDerivedFromTypeFacetFactory extends FacetFactoryAbstract {
031    
032        public TypicalLengthFacetForPropertyDerivedFromTypeFacetFactory() {
033            super(FeatureType.PROPERTIES_ONLY);
034        }
035    
036        @Override
037        public void process(final ProcessMethodContext processMethodContext) {
038            final Class<?> type = processMethodContext.getMethod().getReturnType();
039            final FacetedMethod facetHolder = processMethodContext.getFacetHolder();
040            addFacetDerivedFromTypeIfPresent(facetHolder, type);
041        }
042    
043        private void addFacetDerivedFromTypeIfPresent(final FacetHolder holder, final Class<?> type) {
044            final TypicalLengthFacet facet = getTypicalLengthFacet(type);
045            if (facet != null) {
046                FacetUtil.addFacet(new TypicalLengthFacetForPropertyDerivedFromType(facet, holder));
047            }
048        }
049    
050        private TypicalLengthFacet getTypicalLengthFacet(final Class<?> type) {
051            final ObjectSpecification paramTypeSpec = getSpecificationLookup().loadSpecification(type);
052            return paramTypeSpec.getFacet(TypicalLengthFacet.class);
053        }
054    
055    }