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.typicallen.fromtype;
021
022import org.apache.isis.core.metamodel.facetapi.FacetHolder;
023import org.apache.isis.core.metamodel.facetapi.FacetUtil;
024import org.apache.isis.core.metamodel.facetapi.FeatureType;
025import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
026import org.apache.isis.core.metamodel.facets.FacetedMethod;
027import org.apache.isis.core.metamodel.facets.typicallen.TypicalLengthFacet;
028import org.apache.isis.core.metamodel.spec.ObjectSpecification;
029
030public 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 = getSpecificationLoader().loadSpecification(type);
052        return paramTypeSpec.getFacet(TypicalLengthFacet.class);
053    }
054
055}