/*
* 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.objectstore.jdo.metamodel.facets.object.discriminator;
import javax.jdo.annotations.Discriminator;
import com.google.common.base.Strings;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facetapi.FacetUtil;
import org.apache.isis.core.metamodel.facetapi.FeatureType;
import org.apache.isis.core.metamodel.facets.Annotations;
import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
import org.apache.isis.core.metamodel.specloader.classsubstitutor.ClassSubstitutor;
import org.apache.isis.core.metamodel.specloader.classsubstitutor.ClassSubstitutorAware;
import org.apache.isis.core.progmodel.facets.object.objecttype.ObjectSpecIdFacetDerivedFromClassName;
public class JdoDiscriminatorAnnotationFacetFactory extends FacetFactoryAbstract implements ClassSubstitutorAware {
private ClassSubstitutor classSubstitutor;
public JdoDiscriminatorAnnotationFacetFactory() {
super(FeatureType.OBJECTS_ONLY);
}
@Override
public void process(ProcessClassContext processClassContext) {
final Discriminator annotation = Annotations.getAnnotation(processClassContext.getCls(), Discriminator.class);
if (annotation == null) {
return;
}
String annotationValueAttribute = annotation.value();
if(!Strings.isNullOrEmpty(annotationValueAttribute)) {
FacetUtil.addFacet(new ObjectSpecIdFacetInferredFromJdoDiscriminatorValueAnnotation(annotationValueAttribute, processClassContext.getFacetHolder()));
} else {
final FacetHolder facetHolder = processClassContext.getFacetHolder();
final Class<?> originalClass = processClassContext.getCls();
final Class<?> substitutedClass = classSubstitutor.getClass(originalClass);
FacetUtil.addFacet(new ObjectSpecIdFacetDerivedFromClassName(substitutedClass.getCanonicalName(), facetHolder));
}
FacetUtil.addFacet(new JdoDiscriminatorFacetDefault(annotationValueAttribute, processClassContext.getFacetHolder()));
}
@Override
public void setClassSubstitutor(ClassSubstitutor classSubstitutor) {
this.classSubstitutor = classSubstitutor;
}
}