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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.assembly.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.SCABinding;
import org.apache.tuscany.sca.assembly.SCABindingFactory;
import org.apache.tuscany.sca.assembly.WireFormat;
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.resolver.ModelResolver;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.policy.ExtensionType;
import org.apache.tuscany.sca.policy.PolicyFactory;
import org.apache.tuscany.sca.policy.PolicySubject;
/**
* A processor to read the XML that describes the SCA binding.
*
* @version $Rev$ $Date$
*/
public class SCABindingProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<SCABinding> {
private static final String NAME = "name";
private static final String URI = "uri";
private static final String DELEGATE_BINDING_TYPE = "delegateBindingType";
private static final String DELEGATE_BINDING_URI = "delegateBindingURI";
private static final String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200912";
private static final String BINDING_SCA = "binding.sca";
private static final QName BINDING_SCA_QNAME = new QName(SCA11_NS, BINDING_SCA);
private PolicyFactory policyFactory;
private SCABindingFactory scaBindingFactory;
private PolicySubjectProcessor policyProcessor;
private PolicyFactory intentAttachPointTypeFactory;
private StAXArtifactProcessor<Object> extensionProcessor;
public SCABindingProcessor(FactoryExtensionPoint modelFactories, StAXArtifactProcessor<Object> extensionProcessor) {
this.policyFactory = modelFactories.getFactory(PolicyFactory.class);
this.scaBindingFactory = modelFactories.getFactory(SCABindingFactory.class);
policyProcessor = new PolicySubjectProcessor(policyFactory);
this.intentAttachPointTypeFactory = modelFactories.getFactory(PolicyFactory.class);
this.extensionProcessor = extensionProcessor;
}
public QName getArtifactType() {
return BINDING_SCA_QNAME;
}
public Class<SCABinding> getModelType() {
return SCABinding.class;
}
public SCABinding read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException {
SCABinding scaBinding = scaBindingFactory.createSCABinding();
ExtensionType bindingType = intentAttachPointTypeFactory.createBindingType();
bindingType.setType(getArtifactType());
bindingType.setUnresolved(true);
((PolicySubject)scaBinding).setExtensionType(bindingType);
// Read policies
policyProcessor.readPolicies(scaBinding, reader);
// Read binding name
String name = reader.getAttributeValue(null, NAME);
if (name != null) {
scaBinding.setName(name);
}
// Read binding URI
String uri = getURIString(reader, URI);
if (uri != null) {
scaBinding.setURI(uri);
}
// Read delegate binding type
String delegateBindingType = getString(reader, DELEGATE_BINDING_TYPE);
if (delegateBindingType != null) {
scaBinding.setDelegateBindingType(delegateBindingType);
}
// Read delegate binding URI
String delegateBindingURI = getURIString(reader, DELEGATE_BINDING_URI);
if (delegateBindingURI != null) {
scaBinding.setDelegateBindingURI(delegateBindingURI);
}
// Read any sub-elements
boolean endFound = false;
while (reader.hasNext() && endFound == false) {
int nextElementType = reader.next();
switch (nextElementType) {
case START_ELEMENT:
Object extension = extensionProcessor.read(reader, context);
if (extension != null) {
if (extension instanceof WireFormat) {
scaBinding.setRequestWireFormat((WireFormat)extension);
}
}
break;
case END_ELEMENT:
QName endElementName = reader.getName();
if(endElementName.equals(endElementName)){
endFound = true;
}
break;
}
}
return scaBinding;
}
public void resolve(SCABinding model, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
policyProcessor.resolvePolicies(model, resolver, context);
}
public void write(SCABinding scaBinding, XMLStreamWriter writer, ProcessorContext context) throws ContributionWriteException, XMLStreamException {
// Write <binding.sca>
writer.writeStartElement(SCA11_NS, BINDING_SCA);
policyProcessor.writePolicyAttributes(scaBinding, writer);
// Write binding name
if (scaBinding.getName() != null) {
writer.writeAttribute(NAME, scaBinding.getName());
}
// Write binding URI
if (scaBinding.getURI() != null) {
writer.writeAttribute(URI, scaBinding.getURI());
}
// Write delegate binding type
if (scaBinding.getDelegateBindingType() != null) {
writer.writeAttribute(DELEGATE_BINDING_TYPE, scaBinding.getDelegateBindingType());
}
// Write delegate binding URI
if (scaBinding.getDelegateBindingURI() != null) {
writer.writeAttribute(DELEGATE_BINDING_URI, scaBinding.getDelegateBindingURI());
}
// write wireFormat
extensionProcessor.write(scaBinding.getRequestWireFormat(), writer, context);
writer.writeEndElement();
}
}
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