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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.sca.xml;
import static javax.xml.stream.XMLStreamConstants.END_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.Extension;
import org.apache.tuscany.sca.assembly.ExtensionFactory;
import org.apache.tuscany.sca.assembly.SCABinding;
import org.apache.tuscany.sca.assembly.SCABindingFactory;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.assembly.xml.PolicyAttachPointProcessor;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
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.monitor.Monitor;
import org.apache.tuscany.sca.policy.IntentAttachPointType;
import org.apache.tuscany.sca.policy.IntentAttachPointTypeFactory;
import org.apache.tuscany.sca.policy.PolicyFactory;
import org.apache.tuscany.sca.policy.PolicySetAttachPoint;
/**
* A processor to read the XML that describes the SCA binding.
*
* @version $Rev$ $Date$
*/
public class SCABindingProcessor implements StAXArtifactProcessor<SCABinding>, Constants{
private SCABindingFactory scaBindingFactory;
private ExtensionFactory extensionFactory;
private PolicyFactory policyFactory;
private IntentAttachPointTypeFactory intentAttachPointTypeFactory;
private PolicyAttachPointProcessor policyProcessor;
private StAXAttributeProcessor<Object> extensionAttributeProcessor;
private Monitor monitor;
protected static final String BINDING_SCA = "binding.sca";
protected static final QName BINDING_SCA_QNAME = new QName(Constants.SCA10_NS, BINDING_SCA);
public SCABindingProcessor(ModelFactoryExtensionPoint modelFactories,
StAXArtifactProcessor extensionProcessor,
StAXAttributeProcessor extensionAttributeProcessor,
Monitor monitor) {
this.scaBindingFactory = modelFactories.getFactory(SCABindingFactory.class);
this.extensionFactory = modelFactories.getFactory(ExtensionFactory.class);
this.policyFactory = modelFactories.getFactory(PolicyFactory.class);
this.intentAttachPointTypeFactory = modelFactories.getFactory(IntentAttachPointTypeFactory.class);
this.policyProcessor = new PolicyAttachPointProcessor(policyFactory);
this.extensionAttributeProcessor = extensionAttributeProcessor;
this.monitor = monitor;
}
public QName getArtifactType() {
return BINDING_SCA_QNAME;
}
public Class<SCABinding> getModelType() {
return SCABinding.class;
}
public SCABinding read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
SCABinding scaBinding = scaBindingFactory.createSCABinding();
IntentAttachPointType bindingType = intentAttachPointTypeFactory.createBindingType();
bindingType.setName(getArtifactType());
bindingType.setUnresolved(true);
((PolicySetAttachPoint)scaBinding).setType(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 = reader.getAttributeValue(null, URI);
if (uri != null) {
scaBinding.setURI(uri);
}
// Handle extended attributes
for (int a = 0; a < reader.getAttributeCount(); a++) {
QName attributeName = reader.getAttributeName(a);
if( attributeName.getNamespaceURI() != null && attributeName.getNamespaceURI().length() > 0) {
if( (! Constants.SCA10_NS.equals(attributeName.getNamespaceURI()) &&
(! Constants.SCA10_TUSCANY_NS.equals(attributeName.getNamespaceURI()) ))) {
Object attributeValue = extensionAttributeProcessor.read(attributeName, reader);
Extension attributeExtension;
if (attributeValue instanceof Extension) {
attributeExtension = (Extension) attributeValue;
} else {
attributeExtension = extensionFactory.createExtension(attributeName, attributeValue, true);
}
scaBinding.getAttributeExtensions().add(attributeExtension);
}
}
}
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && BINDING_SCA_QNAME.equals(reader.getName())) {
break;
}
}
return scaBinding;
}
public void resolve(SCABinding model, ModelResolver resolver) throws ContributionResolveException {
policyProcessor.resolvePolicies(model, resolver);
}
public void write(SCABinding scaBinding, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
// Write <binding.sca>
writer.writeStartElement(Constants.SCA10_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 extended attributes
for(Extension extension : scaBinding.getAttributeExtensions()) {
if(extension.isAttribute()) {
extensionAttributeProcessor.write(extension, writer);
}
}
writer.writeEndElement();
}
}
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