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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.sca.binding.http.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.assembly.Base;
import org.apache.tuscany.sca.assembly.OperationSelector;
import org.apache.tuscany.sca.assembly.WireFormat;
import org.apache.tuscany.sca.binding.http.HTTPBinding;
import org.apache.tuscany.sca.binding.http.HTTPBindingFactory;
import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.ContributionWriteException;
import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessor;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
/**
* HTTP binding artifact processor that handles the read/write of HTTP specific XML elements.
*
* @version $Rev$ $Date$
*/
public class HTTPBindingProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<HTTPBinding> {
private static final QName RESPONSE_QNAME = new QName(Base.SCA11_TUSCANY_NS, "response");
private static final String NAME = "name";
private static final String URI = "uri";
private HTTPBindingFactory httpBindingFactory;
private StAXArtifactProcessor<Object> extensionProcessor;
public HTTPBindingProcessor(ExtensionPointRegistry extensionPoints,
StAXArtifactProcessor<Object> extensionProcessor,
StAXAttributeProcessor<Object> extensionAttributeProcessor) {
FactoryExtensionPoint modelFactories = extensionPoints.getExtensionPoint(FactoryExtensionPoint.class);
this.httpBindingFactory = modelFactories.getFactory(HTTPBindingFactory.class);
this.extensionProcessor = (StAXArtifactProcessor<Object>)extensionProcessor;
}
public QName getArtifactType() {
return HTTPBinding.TYPE;
}
public Class<HTTPBinding> getModelType() {
return HTTPBinding.class;
}
public HTTPBinding read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException,XMLStreamException {
HTTPBinding httpBinding = httpBindingFactory.createHTTPBinding();
/**
* <tuscany:binding.http uri="http://localhost:8085/Customer">
* <tuscany:wireFormat.json />
* <tuscany:operationSelector.default />
* <tuscany:response>
* <tuscany:wireFormat.xml />
* </tuscany:response>
* </tuscany:binding.http>
*
*/
while (reader.hasNext()) {
QName elementName = null;
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
elementName = reader.getName();
if (HTTPBinding.TYPE.equals(elementName)) {
String name = getString(reader, NAME);
if (name != null) {
httpBinding.setName(name);
}
String uri = getURIString(reader, URI);
if (uri != null) {
httpBinding.setURI(uri);
}
} else if (RESPONSE_QNAME.equals(elementName)) {
// skip response
reader.next();
// and position to the next start_element event
while (reader.hasNext()) {
int sub_event = reader.getEventType();
switch (sub_event) {
case START_ELEMENT:
elementName = reader.getName();
break;
default:
reader.next();
}
break;
}
// dispatch to read wire format for the response
Object extension = extensionProcessor.read(reader, context);
if (extension != null) {
if (extension instanceof WireFormat) {
httpBinding.setResponseWireFormat((WireFormat)extension);
}
}
break;
} else {
// Read an extension element
Object extension = extensionProcessor.read(reader, context);
if (extension != null) {
if (extension instanceof WireFormat) {
httpBinding.setRequestWireFormat((WireFormat)extension);
} else if (extension instanceof OperationSelector) {
httpBinding.setOperationSelector((OperationSelector)extension);
}
}
}
}
if (event == END_ELEMENT && HTTPBinding.TYPE.equals(reader.getName())) {
break;
}
// Read the next element
if (reader.hasNext()) {
reader.next();
}
}
return httpBinding;
}
public void write(HTTPBinding httpBinding, XMLStreamWriter writer, ProcessorContext context)
throws ContributionWriteException, XMLStreamException {
// writer.writeStartElement(Constants.SCA10_NS, BINDING_HTTP);
writeStart(writer, HTTPBinding.TYPE.getNamespaceURI(), HTTPBinding.TYPE.getLocalPart());
// Write binding name
if (httpBinding.getName() != null) {
writer.writeAttribute(NAME, httpBinding.getName());
}
// Write binding URI
if (httpBinding.getURI() != null) {
writer.writeAttribute(URI, httpBinding.getURI());
}
// Write operation selectors
if (httpBinding.getOperationSelector() != null) {
extensionProcessor.write(httpBinding.getOperationSelector(), writer, context);
}
// Write wire formats
if (httpBinding.getRequestWireFormat() != null) {
extensionProcessor.write(httpBinding.getRequestWireFormat(), writer, context);
}
if (httpBinding.getResponseWireFormat() != null && httpBinding.getRequestWireFormat() != httpBinding
.getResponseWireFormat()) {
writeStart(writer, RESPONSE_QNAME.getNamespaceURI(), RESPONSE_QNAME.getLocalPart());
extensionProcessor.write(httpBinding.getResponseWireFormat(), writer, context);
writeEnd(writer);
}
writeEnd(writer);
// writer.writeEndElement();
}
public void resolve(HTTPBinding model, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
// Should not need to do anything here for now...
}
}
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