/*
* 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 java.net.URISyntaxException;
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.Version.XML_NAMESPACE_1_0;
import org.osoa.sca.annotations.Constructor;
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.InvalidReferenceException;
import org.apache.tuscany.spi.loader.LoaderException;
import org.apache.tuscany.spi.loader.LoaderRegistry;
import org.apache.tuscany.spi.model.Binding;
import org.apache.tuscany.spi.model.BindlessServiceDefinition;
import org.apache.tuscany.spi.model.BoundServiceDefinition;
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: 432913 $ $Date: 2006-08-19 17:58:30 -0700 (Sat, 19 Aug 2006) $
*/
public class ServiceLoader extends LoaderExtension<ServiceDefinition> {
private static final QName SERVICE = new QName(XML_NAMESPACE_1_0, "service");
private static final QName REFERENCE = new QName(XML_NAMESPACE_1_0, "reference");
@Constructor({"registry"})
public ServiceLoader(@Autowire LoaderRegistry registry) {
super(registry);
}
public QName getXMLType() {
return SERVICE;
}
public ServiceDefinition load(CompositeComponent parent,
XMLStreamReader reader,
DeploymentContext deploymentContext)
throws XMLStreamException, LoaderException {
assert SERVICE.equals(reader.getName());
String name = reader.getAttributeValue(null, "name");
String target = null;
Binding binding = null;
ServiceContract serviceContract = null;
while (true) {
int i = reader.next();
switch (i) {
case START_ELEMENT:
// there is a reference already using this qname which doesn't seem appropriate.
if (REFERENCE.equals(reader.getName())) {
String text = reader.getElementText();
target = text != null ? text.trim() : null;
} else {
ModelObject o = registry.load(parent, reader, deploymentContext);
if (o instanceof ServiceContract) {
serviceContract = (ServiceContract) o;
} else if (o instanceof Binding) {
binding = (Binding) o;
}
}
break;
case END_ELEMENT:
if (SERVICE.equals(reader.getName())) {
if (binding != null) {
if (target == null) {
InvalidReferenceException e = new InvalidReferenceException("No target for service ");
e.setIdentifier(name);
throw e;
}
URI targetURI;
try {
targetURI = new URI(target);
} catch (URISyntaxException e) {
InvalidReferenceException ire = new InvalidReferenceException(target);
ire.setIdentifier(name);
throw ire;
}
// FIXME need a way to specify "remotable" on a service
return new BoundServiceDefinition<Binding>(name,
serviceContract,
false,
binding,
targetURI);
} else if (target != null) {
URI targetURI;
try {
targetURI = new URI(target);
} catch (URISyntaxException e) {
InvalidReferenceException ire = new InvalidReferenceException(target);
ire.setIdentifier(name);
throw ire;
}
return new BindlessServiceDefinition(name, serviceContract, false, targetURI);
} else {
// FIXME need a way to specify "remotable" on a service
return new ServiceDefinition(name, serviceContract, false);
}
}
break;
}
}
}
}