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.actions.validate.method;
021
022import java.lang.reflect.Method;
023
024import org.apache.isis.core.commons.lang.StringExtensions;
025import org.apache.isis.core.metamodel.facetapi.Facet;
026import org.apache.isis.core.metamodel.facetapi.FacetHolder;
027import org.apache.isis.core.metamodel.facetapi.FacetUtil;
028import org.apache.isis.core.metamodel.facetapi.FeatureType;
029import org.apache.isis.core.metamodel.methodutils.MethodScope;
030import org.apache.isis.core.progmodel.facets.MethodFinderUtils;
031import org.apache.isis.core.progmodel.facets.MethodPrefixBasedFacetFactoryAbstract;
032import org.apache.isis.core.progmodel.facets.MethodPrefixConstants;
033import org.apache.isis.core.progmodel.facets.actions.validate.ActionValidationFacet;
034
035/**
036 * Sets up {@link ActionValidationFacet}.
037 */
038public class ActionValidationFacetViaValidateMethodFacetFactory extends MethodPrefixBasedFacetFactoryAbstract {
039
040    private static final String[] PREFIXES = { MethodPrefixConstants.VALIDATE_PREFIX };
041
042    /**
043     * Note that the {@link Facet}s registered are the generic ones from
044     * noa-architecture (where they exist)
045     */
046    public ActionValidationFacetViaValidateMethodFacetFactory() {
047        super(FeatureType.ACTIONS_ONLY, OrphanValidation.VALIDATE, PREFIXES);
048    }
049
050    // ///////////////////////////////////////////////////////
051    // Actions
052    // ///////////////////////////////////////////////////////
053
054    @Override
055    public void process(final ProcessMethodContext processMethodContext) {
056        attachValidatingAdvisorFacetForValidateMethodIfFound(processMethodContext);
057    }
058
059    private void attachValidatingAdvisorFacetForValidateMethodIfFound(final ProcessMethodContext processMethodContext) {
060
061        final Class<?> cls = processMethodContext.getCls();
062        final Method actionMethod = processMethodContext.getMethod();
063
064        final String capitalizedName = StringExtensions.asCapitalizedName(actionMethod.getName());
065        final Class<?>[] paramTypes = actionMethod.getParameterTypes();
066        final MethodScope onClass = MethodScope.scopeFor(actionMethod);
067
068        final Method validateMethod = MethodFinderUtils.findMethod(cls, onClass, MethodPrefixConstants.VALIDATE_PREFIX + capitalizedName, String.class, paramTypes);
069        if (validateMethod == null) {
070            return;
071        }
072        processMethodContext.removeMethod(validateMethod);
073
074        final FacetHolder facetedMethod = processMethodContext.getFacetHolder();
075        FacetUtil.addFacet(new ActionValidationFacetViaMethod(validateMethod, facetedMethod));
076    }
077
078}