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.actions.validate.method;
021
022 import java.lang.reflect.Method;
023
024 import org.apache.isis.core.commons.lang.NameUtils;
025 import org.apache.isis.core.metamodel.facetapi.Facet;
026 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
027 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
028 import org.apache.isis.core.metamodel.facetapi.FeatureType;
029 import org.apache.isis.core.metamodel.methodutils.MethodScope;
030 import org.apache.isis.core.progmodel.facets.MethodFinderUtils;
031 import org.apache.isis.core.progmodel.facets.MethodPrefixBasedFacetFactoryAbstract;
032 import org.apache.isis.core.progmodel.facets.MethodPrefixConstants;
033 import org.apache.isis.core.progmodel.facets.actions.validate.ActionValidationFacet;
034
035 /**
036 * Sets up {@link ActionValidationFacet}.
037 */
038 public 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 noa-architecture (where they exist)
044 */
045 public ActionValidationFacetViaValidateMethodFacetFactory() {
046 super(FeatureType.ACTIONS_ONLY, PREFIXES);
047 }
048
049 // ///////////////////////////////////////////////////////
050 // Actions
051 // ///////////////////////////////////////////////////////
052
053 @Override
054 public void process(final ProcessMethodContext processMethodContext) {
055 attachValidatingAdvisorFacetForValidateMethodIfFound(processMethodContext);
056 }
057
058 private void attachValidatingAdvisorFacetForValidateMethodIfFound(final ProcessMethodContext processMethodContext) {
059
060 final Class<?> cls = processMethodContext.getCls();
061 final Method actionMethod = processMethodContext.getMethod();
062
063 final String capitalizedName = NameUtils.capitalizeName(actionMethod.getName());
064 final Class<?>[] paramTypes = actionMethod.getParameterTypes();
065 final MethodScope onClass = MethodScope.scopeFor(actionMethod);
066
067 final Method validateMethod =
068 MethodFinderUtils.findMethod(cls, onClass, MethodPrefixConstants.VALIDATE_PREFIX + capitalizedName,
069 String.class, paramTypes);
070 if (validateMethod == null) {
071 return;
072 }
073 processMethodContext.removeMethod(validateMethod);
074
075 final FacetHolder facetedMethod = processMethodContext.getFacetHolder();
076 FacetUtil.addFacet(new ActionValidationFacetViaMethod(validateMethod, facetedMethod));
077 }
078
079 }