/*******************************************************************************
* Copyright (c) 2011, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* dclarke/tware - initial
* tware
******************************************************************************/
package org.eclipse.persistence.jpa.rs.util.metadatasources;
import java.util.Map;
import javax.xml.bind.JAXBElement;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.dynamic.DynamicEntity;
import org.eclipse.persistence.eis.mappings.EISCompositeCollectionMapping;
import org.eclipse.persistence.eis.mappings.EISCompositeDirectCollectionMapping;
import org.eclipse.persistence.internal.descriptors.VirtualAttributeAccessor;
import org.eclipse.persistence.internal.jpa.weaving.RestAdapterClassWriter;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.jaxb.metadata.MetadataSource;
import org.eclipse.persistence.jaxb.xmlmodel.JavaType;
import org.eclipse.persistence.jaxb.xmlmodel.JavaType.JavaAttributes;
import org.eclipse.persistence.jaxb.xmlmodel.ObjectFactory;
import org.eclipse.persistence.jaxb.xmlmodel.XmlAccessMethods;
import org.eclipse.persistence.jaxb.xmlmodel.XmlBindings;
import org.eclipse.persistence.jaxb.xmlmodel.XmlBindings.JavaTypes;
import org.eclipse.persistence.jaxb.xmlmodel.XmlElement;
import org.eclipse.persistence.jaxb.xmlmodel.XmlJavaTypeAdapter;
import org.eclipse.persistence.jaxb.xmlmodel.XmlVirtualAccessMethods;
import org.eclipse.persistence.mappings.CollectionMapping;
import org.eclipse.persistence.mappings.DatabaseMapping;
import org.eclipse.persistence.mappings.ObjectReferenceMapping;
/**
* {@link MetadataSource} used in the creation of dynamic JAXB contexts for applications.
*
* @author dclarke
* @since EclipseLink 2.4.0
*/
public class DynamicXMLMetadataSource implements MetadataSource {
private XmlBindings xmlBindings;
public DynamicXMLMetadataSource(AbstractSession session, String packageName) {
ObjectFactory objectFactory = new ObjectFactory();
xmlBindings = new XmlBindings();
xmlBindings.setPackageName(packageName);
JavaTypes javaTypes = new JavaTypes();
xmlBindings.setJavaTypes(javaTypes);
for (ClassDescriptor ormDescriptor : session.getProject().getOrderedDescriptors()) {
String descriptorPackageName = "";
if (ormDescriptor.getJavaClassName().lastIndexOf('.') > 0) {
descriptorPackageName = ormDescriptor.getJavaClassName().substring(0, ormDescriptor.getJavaClassName().lastIndexOf('.'));
}
if (descriptorPackageName.equals(packageName)) {
javaTypes.getJavaType().add(createJAXBType(ormDescriptor, objectFactory));
}
}
}
/**
* Create a javaType to be used by JAXB to map a particular class.
* For static classes, JAXB annotations, xml and defaults will be used to map the class.
* For Dynamic classes we create properties for each JPA mapping on the class
* thing we create is a
* @param classDescriptor
* @param objectFactory
* @return
*/
private JavaType createJAXBType(ClassDescriptor classDescriptor, ObjectFactory objectFactory) {
JavaType javaType = new JavaType();
String alias = classDescriptor.getAlias();
if (alias == null || alias.isEmpty()) {
alias = classDescriptor.getJavaClass().getSimpleName();
}
javaType.setName(alias);
javaType.setJavaAttributes(new JavaAttributes());
boolean isDynamic = DynamicEntity.class.isAssignableFrom(classDescriptor.getJavaClass());
for (DatabaseMapping ormMapping : classDescriptor.getMappings()) {
JAXBElement<XmlElement> element = createJAXBProperty(ormMapping, objectFactory, javaType, isDynamic);
if (element != null) {
javaType.getJavaAttributes().getJavaAttribute().add(element);
}
}
// Embeddables don't need Rest adapters, return if the classDescriptor is an aggregate descriptor.
if (classDescriptor.isAggregateDescriptor()) {
return javaType;
}
// Set an adapter that is a subclass of ReferenceAdapter that can adapt the class to create a link for
// the persistence_href field that has been weaved in.
String name = RestAdapterClassWriter.constructClassNameForReferenceAdapter(classDescriptor.getJavaClassName());
XmlJavaTypeAdapter adapter = new XmlJavaTypeAdapter();
adapter.setValue(name);
adapter.setValueType(classDescriptor.getJavaClassName());
adapter.setType(classDescriptor.getJavaClassName());
javaType.setXmlJavaTypeAdapter(adapter);
return javaType;
}
/**
* Create a JAXB property for a particular mapping.
* This will only create JAXBProperties for mappings that are virtual - either because their
* parent object is a dynamic class, or because the owning static class has virtual properties
* @param mapping
* @param objectFactory
* @param owningType
* @param isDynamic
* @return
*/
private JAXBElement<XmlElement> createJAXBProperty(DatabaseMapping mapping, ObjectFactory objectFactory, JavaType owningType, boolean isDynamic) {
if (!mapping.getAttributeAccessor().isVirtualAttributeAccessor() &&
!isDynamic) {
return null;
}
XmlElement xmlElement = new XmlElement();
xmlElement.setJavaAttribute(mapping.getAttributeName());
if (mapping.isObjectReferenceMapping()) {
xmlElement.setType(((ObjectReferenceMapping) mapping).getReferenceClassName());
} else if (mapping.isCollectionMapping()) {
if (mapping.isEISMapping()) {
// No way to find out the type of the collection from EIS mappings, currently, so just set the container policy here...
// It will be fine for simple collections
if (mapping instanceof EISCompositeDirectCollectionMapping) {
xmlElement.setContainerType(((EISCompositeDirectCollectionMapping) mapping).getContainerPolicy().getContainerClassName());
} else if (mapping instanceof EISCompositeCollectionMapping) {
xmlElement.setContainerType(((EISCompositeCollectionMapping) mapping).getContainerPolicy().getContainerClassName());
xmlElement.setType(((EISCompositeCollectionMapping) mapping).getReferenceClassName());
}
} else {
xmlElement.setType(((CollectionMapping) mapping).getReferenceClassName());
xmlElement.setContainerType(((CollectionMapping) mapping).getContainerPolicy().getContainerClassName());
}
} else {
xmlElement.setType(mapping.getAttributeClassification().getName());
}
if (mapping.getAttributeAccessor().isVirtualAttributeAccessor()) {
VirtualAttributeAccessor jpaAccessor = (VirtualAttributeAccessor) mapping.getAttributeAccessor();
if (owningType.getXmlVirtualAccessMethods() == null) {
XmlVirtualAccessMethods virtualAccessMethods = new XmlVirtualAccessMethods();
virtualAccessMethods.setGetMethod(jpaAccessor.getGetMethodName());
virtualAccessMethods.setSetMethod(jpaAccessor.getSetMethodName());
owningType.setXmlVirtualAccessMethods(virtualAccessMethods);
} else if (!owningType.getXmlVirtualAccessMethods().getGetMethod().equals(jpaAccessor.getGetMethodName())) {
XmlAccessMethods accessMethods = new XmlAccessMethods();
accessMethods.setGetMethod(jpaAccessor.getGetMethodName());
accessMethods.setSetMethod(jpaAccessor.getSetMethodName());
xmlElement.setXmlAccessMethods(accessMethods);
}
}
return objectFactory.createXmlElement(xmlElement);
}
public XmlBindings getXmlBindings(Map<String, ?> properties, ClassLoader classLoader) {
return this.xmlBindings;
}
}