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.param.validate.regexannot;
021
022import java.lang.annotation.Annotation;
023
024import org.apache.isis.applib.annotation.RegEx;
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.FacetFactoryAbstract;
030import org.apache.isis.core.metamodel.facets.object.title.TitleFacet;
031import org.apache.isis.core.progmodel.facets.object.regex.RegExFacet;
032import org.apache.isis.core.progmodel.facets.object.regex.TitleFacetFormattedByRegex;
033
034public class RegExFacetAnnotationForParameterFacetFactory extends FacetFactoryAbstract {
035
036    public RegExFacetAnnotationForParameterFacetFactory() {
037        super(FeatureType.PARAMETERS_ONLY);
038    }
039
040    @Override
041    public void processParams(final ProcessParameterContext processParameterContext) {
042        final Class<?>[] parameterTypes = processParameterContext.getMethod().getParameterTypes();
043        if (processParameterContext.getParamNum() >= parameterTypes.length) {
044            // ignore
045            return;
046        }
047        if (!Annotations.isString(parameterTypes[processParameterContext.getParamNum()])) {
048            return;
049        }
050
051        final Annotation[] parameterAnnotations = Annotations.getParameterAnnotations(processParameterContext.getMethod())[processParameterContext.getParamNum()];
052        for (final Annotation parameterAnnotation : parameterAnnotations) {
053            if (parameterAnnotation instanceof RegEx) {
054                final RegEx annotation = (RegEx) parameterAnnotation;
055                addRegexFacetAndCorrespondingTitleFacet(processParameterContext.getFacetHolder(), annotation);
056                return;
057            }
058        }
059    }
060
061    private void addRegexFacetAndCorrespondingTitleFacet(final FacetHolder holder, final RegEx annotation) {
062        final RegExFacet regexFacet = createRegexFacet(annotation, holder);
063        if (regexFacet == null) {
064            return;
065        }
066        FacetUtil.addFacet(regexFacet);
067
068        final TitleFacet titleFacet = createTitleFacet(regexFacet);
069        FacetUtil.addFacet(titleFacet);
070    }
071
072    private RegExFacet createRegexFacet(final RegEx annotation, final FacetHolder holder) {
073        if (annotation == null) {
074            return null;
075        }
076
077        final String validationExpression = annotation.validation();
078        final boolean caseSensitive = annotation.caseSensitive();
079        final String formatExpression = annotation.format();
080
081        return new RegExFacetAnnotationForParameter(validationExpression, formatExpression, caseSensitive, holder);
082    }
083
084    private TitleFacet createTitleFacet(final RegExFacet regexFacet) {
085        return new TitleFacetFormattedByRegex(regexFacet);
086    }
087
088}