/*
* 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.deltaspike.jpa.spi.descriptor.xml;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.enterprise.inject.Typed;
@Typed
public class PersistenceUnitDescriptorParser extends DescriptorReader
{
public static final String RESOURCE_PATH = "META-INF/persistence.xml";
private final EntityMappingsDescriptorParser entityMappingsDescriptorParser
= new EntityMappingsDescriptorParser();
public List<PersistenceUnitDescriptor> readAll() throws IOException
{
List<PersistenceUnitDescriptor> result = new LinkedList<PersistenceUnitDescriptor>();
List<Descriptor> persistenceXmls = readAllFromClassPath(RESOURCE_PATH);
for (Descriptor desc : persistenceXmls)
{
result.addAll(lookupUnits(desc));
}
return Collections.unmodifiableList(result);
}
protected List<PersistenceUnitDescriptor> lookupUnits(Descriptor descriptor)
{
List<PersistenceUnitDescriptor> result = new LinkedList<PersistenceUnitDescriptor>();
NodeList list = descriptor.getDocument().getDocumentElement().getElementsByTagName("persistence-unit");
for (int i = 0; i < list.getLength(); i++)
{
Node node = list.item(i);
String unitName = extractUnitName(node);
String baseUrl = extractBaseUrl(descriptor.getUrl(), RESOURCE_PATH);
List<EntityDescriptor> entities = extractMappings((Element) node, baseUrl, unitName);
Map<String, String> properties = extractProperties((Element) node);
result.add(new PersistenceUnitDescriptor(unitName, entities, properties));
}
return result;
}
protected List<EntityDescriptor> extractMappings(Element element, String baseUrl, String unitName)
{
try
{
List<EntityDescriptor> entities = new LinkedList<EntityDescriptor>();
List<MappedSuperclassDescriptor> superClasses = new LinkedList<MappedSuperclassDescriptor>();
NodeList list = element.getElementsByTagName("mapping-file");
readMappingFiles(baseUrl, unitName, entities, superClasses, list);
EntityMappingsDescriptor mappings = entityMappingsDescriptorParser.readDefaultOrm(baseUrl);
entities.addAll(mappings.getEntityDescriptors());
superClasses.addAll(mappings.getMappedSuperclassDescriptors());
AbstractEntityHierarchyBuilder.buildHierarchy(entities, superClasses);
return entities;
}
catch (Exception e)
{
throw new RuntimeException("Failed initializing mapping files", e);
}
}
protected void readMappingFiles(String baseUrl, String unitName,
List<EntityDescriptor> entities, List<MappedSuperclassDescriptor> superClasses,
NodeList list)
{
for (int i = 0; i < list.getLength(); i++)
{
String resource = list.item(i).getTextContent();
try
{
EntityMappingsDescriptor mappings = entityMappingsDescriptorParser.readAll(baseUrl, resource);
entities.addAll(mappings.getEntityDescriptors());
superClasses.addAll(mappings.getMappedSuperclassDescriptors());
}
catch (Exception e)
{
throw new RuntimeException("[PersistenceUnit: " + unitName + "] " +
"Unable to resolve named mapping-file [" + resource + "]");
}
}
}
protected String extractUnitName(Node node)
{
return node.getAttributes().getNamedItem("name").getTextContent();
}
protected Map<String, String> extractProperties(Element element)
{
Map<String, String> propertiesMap = new HashMap<String, String>();
Node propertiesNode = element.getElementsByTagName("properties").item(0);
if (propertiesNode != null)
{
NodeList propertyNodes = propertiesNode.getChildNodes();
for (int i = 0; i < propertyNodes.getLength(); i++)
{
if ("property".equals(propertyNodes.item(i).getNodeName()))
{
Element propertyNode = (Element) propertyNodes.item(i);
propertiesMap.put(propertyNode.getAttribute("name"), propertyNode.getAttribute("value"));
}
}
}
return Collections.unmodifiableMap(propertiesMap);
}
}