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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.core.loader;
import java.net.URI;
import javax.xml.namespace.QName;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import static org.osoa.sca.Constants.SCA_NS;
import org.osoa.sca.annotations.Constructor;
import org.osoa.sca.annotations.Reference;
import org.apache.tuscany.spi.QualifiedName;
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.UnrecognizedElementException;
import org.apache.tuscany.spi.model.BindingDefinition;
import org.apache.tuscany.spi.model.ModelObject;
import org.apache.tuscany.spi.model.ServiceContract;
import org.apache.tuscany.spi.model.ServiceDefinition;
/**
* Loads a service definition from an XML-based assembly file
*
* @version $Rev$ $Date$
*/
public class ServiceLoader extends LoaderExtension<ServiceDefinition> {
private static final QName SERVICE = new QName(SCA_NS, "service");
@Constructor
public ServiceLoader(@Reference LoaderRegistry registry) {
super(registry);
}
public QName getXMLType() {
return SERVICE;
}
public ServiceDefinition load(ModelObject object, XMLStreamReader reader, DeploymentContext context)
throws XMLStreamException, LoaderException {
assert SERVICE.equals(reader.getName());
String name = reader.getAttributeValue(null, "name");
URI compositeId = context.getComponentId();
URI componentBase = URI.create(compositeId + "/");
ServiceDefinition def = new ServiceDefinition();
def.setUri(compositeId.resolve('#' + name));
URI targetUri = null;
String promote = reader.getAttributeValue(null, "promote");
if (promote != null) {
QualifiedName qName = new QualifiedName(promote);
targetUri = componentBase.resolve(qName.getFragment());
}
while (true) {
int i = reader.next();
switch (i) {
case START_ELEMENT:
ModelObject o = registry.load(null, reader, context);
if (o instanceof ServiceContract) {
def.setServiceContract((ServiceContract) o);
} else if (o instanceof BindingDefinition) {
def.addBinding((BindingDefinition) o);
} else {
throw new UnrecognizedElementException(reader.getName());
}
break;
case END_ELEMENT:
if (SERVICE.equals(reader.getName())) {
if (targetUri != null) {
def.setTarget(targetUri);
}
return def;
}
break;
}
}
}
}
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