/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.isis.core.progmodel.facets.actions.typeof.annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import org.apache.isis.applib.annotation.TypeOf;
import org.apache.isis.core.metamodel.facetapi.FacetUtil;
import org.apache.isis.core.metamodel.facetapi.FeatureType;
import org.apache.isis.core.metamodel.facets.AnnotationBasedFacetFactoryAbstract;
import org.apache.isis.core.metamodel.facets.typeof.TypeOfFacetInferredFromArray;
import org.apache.isis.core.metamodel.facets.typeof.TypeOfFacetInferredFromGenerics;
import org.apache.isis.core.metamodel.specloader.collectiontyperegistry.CollectionTypeRegistry;
import org.apache.isis.core.metamodel.specloader.collectiontyperegistry.CollectionTypeRegistryAware;
public class TypeOfAnnotationForActionsFacetFactory extends AnnotationBasedFacetFactoryAbstract implements
CollectionTypeRegistryAware {
private CollectionTypeRegistry collectionTypeRegistry;
public TypeOfAnnotationForActionsFacetFactory() {
super(FeatureType.ACTIONS_ONLY);
}
@Override
public void process(final ProcessMethodContext processMethodContext) {
final TypeOf annotation = getAnnotation(processMethodContext.getMethod(), TypeOf.class);
final Class<?> methodReturnType = processMethodContext.getMethod().getReturnType();
if (!collectionTypeRegistry.isCollectionType(methodReturnType)
&& !collectionTypeRegistry.isArrayType(methodReturnType)) {
return;
}
final Class<?> returnType = processMethodContext.getMethod().getReturnType();
if (returnType.isArray()) {
final Class<?> componentType = returnType.getComponentType();
FacetUtil.addFacet(new TypeOfFacetInferredFromArray(componentType, processMethodContext.getFacetHolder(),
getSpecificationLookup()));
return;
}
if (annotation != null) {
FacetUtil.addFacet(new TypeOfFacetAnnotationForAction(annotation.value(), processMethodContext
.getFacetHolder(), getSpecificationLookup()));
return;
}
final Type type = processMethodContext.getMethod().getGenericReturnType();
if (!(type instanceof ParameterizedType)) {
return;
}
final ParameterizedType parameterizedType = (ParameterizedType) type;
final Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
if (actualTypeArguments.length == 0) {
return;
}
final Object actualTypeArgument = actualTypeArguments[0];
if (actualTypeArgument instanceof Class) {
final Class<?> actualType = (Class<?>) actualTypeArgument;
FacetUtil.addFacet(new TypeOfFacetInferredFromGenerics(actualType, processMethodContext.getFacetHolder(),
getSpecificationLookup()));
return;
}
if (actualTypeArgument instanceof TypeVariable) {
// TODO: what to do here?
return;
}
}
@Override
public void setCollectionTypeRegistry(final CollectionTypeRegistry collectionTypeRegistry) {
this.collectionTypeRegistry = collectionTypeRegistry;
}
}