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/*
* 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.tuscany.container.dataaccess;
import java.io.InputStream;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.apache.tuscany.spi.annotation.Autowire;
import org.apache.tuscany.spi.component.CompositeComponent;
import org.apache.tuscany.spi.deployer.DeploymentContext;
import org.apache.tuscany.spi.extension.LoaderExtension;
import org.apache.tuscany.spi.loader.LoaderException;
import org.apache.tuscany.spi.loader.LoaderRegistry;
import org.apache.tuscany.spi.loader.LoaderUtil;
import org.apache.tuscany.spi.loader.MissingResourceException;
import org.apache.tuscany.spi.model.ModelObject;
import org.osoa.sca.annotations.Constructor;
/**
* Loader for handling JavaScript <da:implementation.da> elements.
*
* Example would be as below
* <composite xmlns="http://www.osoa.org/xmlns/sca/1.0" xmlns:das="http://tuscany.apache.org/xmlns/das/1.0" name="CustomersOrdersComposite">
* <component name="CustomersOrdersComponent">
* <das:implementation.das config="customersOrders/CustomersOrders.xml" dataAccessType="rdb"/>
* </component>
* </composite>
*/
public class DataAccessImplementationLoader extends LoaderExtension<DataAccessImplementation> {
private static String XML_DATAACCESS_NAMESPACE = "http://tuscany.apache.org/xmlns/das/1.0";
private static final QName IMPLEMENTATION_DATAACCESS = new QName(XML_DATAACCESS_NAMESPACE, "implementation.das");
@Constructor({"registry"})
public DataAccessImplementationLoader(@Autowire LoaderRegistry registry) {
super(registry);
}
public QName getXMLType() {
return IMPLEMENTATION_DATAACCESS;
}
public DataAccessImplementation load(CompositeComponent parent,
ModelObject mo,
XMLStreamReader reader,
DeploymentContext deploymentContext) throws XMLStreamException, LoaderException {
String dasConfig = reader.getAttributeValue(null, "config");
String dataAccessType = reader.getAttributeValue(null, "dataAccessType");
if ( dasConfig == null ) {
throw new MissingResourceException("No config provided supplied");
}
ClassLoader cl = deploymentContext.getClassLoader();
InputStream dasConfigStream = loadConfig(cl, dasConfig);
LoaderUtil.skipToEndElement(reader);
DataAccessImplementation implementation = new DataAccessImplementation();
implementation.setDasConfig(dasConfig);
implementation.setDasConfigStream(dasConfigStream);
implementation.setDataAccessType(dataAccessType);
implementation.setClassLoader(cl);
registry.loadComponentType(parent, implementation, deploymentContext);
return implementation;
}
protected InputStream loadConfig(ClassLoader classLoader, String configResource) throws LoaderException {
return classLoader.getResourceAsStream(configResource);
}
}
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