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.members.disable.staticmethod;
021
022 import java.lang.reflect.Method;
023
024 import org.apache.isis.core.commons.lang.NameUtils;
025 import org.apache.isis.core.metamodel.adapter.util.InvokeUtils;
026 import org.apache.isis.core.metamodel.exceptions.MetaModelException;
027 import org.apache.isis.core.metamodel.facetapi.Facet;
028 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
029 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
030 import org.apache.isis.core.metamodel.facetapi.FeatureType;
031 import org.apache.isis.core.metamodel.methodutils.MethodScope;
032 import org.apache.isis.core.progmodel.facets.MethodFinderUtils;
033 import org.apache.isis.core.progmodel.facets.MethodPrefixBasedFacetFactoryAbstract;
034 import org.apache.isis.core.progmodel.facets.MethodPrefixConstants;
035
036 public class DisabledFacetViaProtectMethodFacetFactory extends MethodPrefixBasedFacetFactoryAbstract {
037
038 private static final String[] PREFIXES = { MethodPrefixConstants.PROTECT_PREFIX };
039
040 /**
041 * Note that the {@link Facet}s registered are the generic ones from noa-architecture (where they exist)
042 */
043 public DisabledFacetViaProtectMethodFacetFactory() {
044 super(FeatureType.MEMBERS, PREFIXES);
045 }
046
047 // ///////////////////////////////////////////////////////
048 // Actions
049 // ///////////////////////////////////////////////////////
050
051 @Override
052 public void process(final ProcessMethodContext processMethodContext) {
053 attachDisabledFacetIfProtectMethodIsFound(processMethodContext);
054 }
055
056 public static void attachDisabledFacetIfProtectMethodIsFound(final ProcessMethodContext processMethodContext) {
057
058 final Class<?>[] paramTypes = new Class[] {};
059
060 final Class<?> type = processMethodContext.getCls();
061 final Method method = processMethodContext.getMethod();
062
063 final String capitalizedName = NameUtils.javaBaseNameStripAccessorPrefixIfRequired(method.getName());
064
065 final Method protectMethod =
066 MethodFinderUtils.findMethodWithOrWithoutParameters(type, MethodScope.CLASS,
067 MethodPrefixConstants.PROTECT_PREFIX + capitalizedName, boolean.class, paramTypes);
068 if (protectMethod == null) {
069 return;
070 }
071
072 processMethodContext.removeMethod(protectMethod);
073
074 final Boolean protectMethodReturnValue = invokeProtectMethod(protectMethod);
075 if (!protectMethodReturnValue.booleanValue()) {
076 return;
077 }
078
079 final FacetHolder facetedMethod = processMethodContext.getFacetHolder();
080 FacetUtil.addFacet(new DisabledFacetAlways(facetedMethod));
081 }
082
083 private static Boolean invokeProtectMethod(final Method protectMethod) {
084 Boolean protectMethodReturnValue = null;
085 try {
086 protectMethodReturnValue = (Boolean) InvokeUtils.invokeStatic(protectMethod);
087 } catch (final ClassCastException ex) {
088 // ignore
089 }
090 if (protectMethodReturnValue == null) {
091 throw new MetaModelException("method " + protectMethod + "must return a boolean");
092 }
093 return protectMethodReturnValue;
094 }
095
096 }