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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 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.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.InvalidWireException;
import org.apache.tuscany.spi.loader.LoaderException;
import org.apache.tuscany.spi.loader.LoaderRegistry;
import org.apache.tuscany.spi.model.ModelObject;
import org.apache.tuscany.spi.model.WireDefinition;
/**
* Loads a wire from an XML-based assembly file
*
* @version $Rev: 465084 $ $Date: 2006-10-18 04:00:49 +0530 (Wed, 18 Oct 2006) $
*/
public class WireLoader extends LoaderExtension<WireDefinition> {
private static final QName WIRE = new QName(SCA_NS, "wire");
private static final QName SOURCE_URI = new QName(SCA_NS, "source.uri");
private static final QName TARGET_URI = new QName(SCA_NS, "target.uri");
@Constructor
public WireLoader(@Reference LoaderRegistry registry) {
super(registry);
}
public QName getXMLType() {
return WIRE;
}
public WireDefinition load(
ModelObject object,
XMLStreamReader reader,
DeploymentContext deploymentContext) throws XMLStreamException, LoaderException {
assert WIRE.equals(reader.getName());
WireDefinition wireDefn;
URI sourceURI = null;
URI targetURI = null;
String uriString;
while (true) {
switch (reader.next()) {
case START_ELEMENT:
try {
if (reader.getName().equals(SOURCE_URI)) {
uriString = reader.getElementText();
if (uriString != null && uriString.trim().length() > 0) {
QualifiedName name = new QualifiedName(uriString);
if (name.getPortName() == null) {
sourceURI = new URI(uriString);
} else {
sourceURI = new URI(name.getPartName() + "#" + name.getPortName());
}
} else {
throw new InvalidWireException("Wire source not defined");
}
} else if (reader.getName().equals(TARGET_URI)) {
uriString = reader.getElementText();
if (uriString != null && uriString.trim().length() > 0) {
QualifiedName name = new QualifiedName(uriString);
if (name.getPortName() == null) {
targetURI = new URI(uriString);
} else {
targetURI = new URI(name.getPartName() + "#" + name.getPortName());
}
} else {
throw new InvalidWireException("Wire target not defined");
}
} else {
QName name = reader.getName();
throw new InvalidWireException("Unrecognized element in wire ", name.toString());
}
} catch (URISyntaxException e) {
throw new InvalidWireException("Invalid wire uri", e);
}
reader.next();
break;
case END_ELEMENT:
if (reader.getName().equals(WIRE)) {
if (sourceURI != null && targetURI != null) {
wireDefn = new WireDefinition();
wireDefn.setSource(sourceURI);
wireDefn.setTarget(targetURI);
} else {
throw new InvalidWireException("Incomplete wire definition");
}
return wireDefn;
}
}
}
}
}
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