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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.OperationSelector;
import org.apache.tuscany.sca.assembly.WireFormat;
import org.apache.tuscany.sca.assembly.builder.impl.ProblemImpl;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.assembly.xml.PolicyAttachPointProcessor;
import org.apache.tuscany.sca.binding.http.HTTPBinding;
import org.apache.tuscany.sca.binding.http.HTTPBindingFactory;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
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.contribution.service.ContributionReadException;
import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.monitor.Problem;
import org.apache.tuscany.sca.monitor.Problem.Severity;
import org.apache.tuscany.sca.policy.PolicyFactory;
public class HTTPBindingProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<HTTPBinding> {
private static final String BINDING_HTTP = "binding.http";
private static final QName BINDING_HTTP_QNAME = new QName(Constants.SCA10_TUSCANY_NS, BINDING_HTTP);
private static final String NAME = "name";
private static final String URI = "uri";
private HTTPBindingFactory httpBindingFactory;
private StAXArtifactProcessor<Object> extensionProcessor;
private StAXAttributeProcessor<Object> extensionAttributeProcessor;
private PolicyFactory policyFactory;
private PolicyAttachPointProcessor policyProcessor;
private Monitor monitor;
public HTTPBindingProcessor(ExtensionPointRegistry extensionPoints,
StAXArtifactProcessor extensionProcessor,
StAXAttributeProcessor extensionAttributeProcessor,
Monitor monitor) {
ModelFactoryExtensionPoint modelFactories = extensionPoints.getExtensionPoint(ModelFactoryExtensionPoint.class);
this.httpBindingFactory = modelFactories.getFactory(HTTPBindingFactory.class);
this.extensionProcessor = (StAXArtifactProcessor<Object>)extensionProcessor;
this.extensionAttributeProcessor = extensionAttributeProcessor;
this.policyFactory = modelFactories.getFactory(PolicyFactory.class);
this.policyProcessor = new PolicyAttachPointProcessor(policyFactory);
this.monitor = monitor;
}
public QName getArtifactType() {
return BINDING_HTTP_QNAME;
}
public Class<HTTPBinding> getModelType() {
return HTTPBinding.class;
}
public HTTPBinding read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
HTTPBinding httpBinding = httpBindingFactory.createHTTPBinding();
// Read policies
policyProcessor.readPolicies(httpBinding, reader);
while(reader.hasNext()) {
QName elementName = null;
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
elementName = reader.getName();
if (BINDING_HTTP_QNAME.equals(elementName)) {
String name = getString(reader, NAME);
if(name != null) {
httpBinding.setName(name);
}
String uri = getString(reader, URI);
if (uri != null) {
httpBinding.setURI(uri);
}
} else {
// Read an extension element
Object extension = extensionProcessor.read(reader);
if (extension != null) {
if (extension instanceof WireFormat) {
httpBinding.setRequestWireFormat((WireFormat)extension);
} else if(extension instanceof OperationSelector) {
httpBinding.setOperationSelector((OperationSelector)extension);
}
}
}
}
if (event == END_ELEMENT && BINDING_HTTP_QNAME.equals(reader.getName())) {
break;
}
// Read the next element
if (reader.hasNext()) {
reader.next();
}
}
return httpBinding;
}
public void write(HTTPBinding httpBinding, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
//writer.writeStartElement(Constants.SCA10_NS, BINDING_HTTP);
writeStart(writer, BINDING_HTTP_QNAME.getNamespaceURI(), BINDING_HTTP_QNAME.getLocalPart());
//write policies
policyProcessor.writePolicyAttributes(httpBinding, writer);
// Write binding name
if (httpBinding.getName() != null) {
writer.writeAttribute(NAME, httpBinding.getName());
}
// Write binding URI
if (httpBinding.getURI() != null) {
writer.writeAttribute(URI, httpBinding.getURI());
}
if ( httpBinding.getRequestWireFormat() != null ) {
extensionProcessor.write(httpBinding.getRequestWireFormat(), writer);
}
if ( httpBinding.getOperationSelector() != null ) {
extensionProcessor.write(httpBinding.getOperationSelector(), writer);
}
writeEnd(writer);
//writer.writeEndElement();
}
public void resolve(HTTPBinding model, ModelResolver resolver) throws ContributionResolveException {
policyProcessor.resolvePolicies(model, resolver);
}
/**
* Report a error.
*
* @param problems
* @param message
* @param model
*/
private void error(String message, Object model, Object... messageParameters) {
if (monitor != null) {
Problem problem = new ProblemImpl(this.getClass().getName(), "binding-http-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
monitor.problem(problem);
}
}
}
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