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 */
019package org.apache.isis.core.progmodel.facets.properties.javaxvaldigits;
020
021import java.math.BigDecimal;
022
023import javax.validation.constraints.Digits;
024
025import org.apache.isis.core.metamodel.facetapi.FacetUtil;
026import org.apache.isis.core.metamodel.facetapi.FeatureType;
027import org.apache.isis.core.metamodel.facets.Annotations;
028import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
029import org.apache.isis.core.metamodel.facets.FacetedMethod;
030import org.apache.isis.core.progmodel.facets.value.bigdecimal.BigDecimalValueFacet;
031
032public class BigDecimalForPropertyDerivedFromJavaxValidationDigitsFacetFactory extends FacetFactoryAbstract {
033
034    public BigDecimalForPropertyDerivedFromJavaxValidationDigitsFacetFactory() {
035        super(FeatureType.PROPERTIES_ONLY);
036    }
037
038    @Override
039    public void process(final ProcessMethodContext processMethodContext) {
040
041        if (BigDecimal.class != processMethodContext.getMethod().getReturnType()) {
042            return;
043        }
044
045        final Digits annotation = Annotations.getAnnotation(processMethodContext.getMethod(), Digits.class);
046        if (annotation == null) {
047            return;
048        }
049        FacetUtil.addFacet(create(processMethodContext, annotation));
050    }
051
052    private BigDecimalValueFacet create(final ProcessMethodContext processMethodContext, final Digits annotation) {
053        final FacetedMethod holder = processMethodContext.getFacetHolder();
054        final int length = annotation.integer() + annotation.fraction();
055        final int scale = annotation.fraction();
056        return new BigDecimalFacetForPropertyFromJavaxValidationDigitsAnnotation(holder, length, scale);
057    }    
058
059}