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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 crud.impl;
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.contribution.processor.StAXArtifactProcessor;
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 crud.CRUDImplementation;
import crud.CRUDImplementationFactory;
/**
* Implements a STAX artifact processor for CRUD implementations.
*
* The artifact processor is responsible for processing <implementation.crud>
* elements in SCA assembly XML composite files and populating the CRUD
* implementation model, resolving its references to other artifacts in the SCA
* contribution, and optionally write the model back to SCA assembly XML.
*/
public class CRUDImplementationProcessor implements StAXArtifactProcessor<CRUDImplementation> {
private static final QName IMPLEMENTATION_CRUD = new QName("http://crud", "implementation.crud");
private CRUDImplementationFactory crudFactory;
public CRUDImplementationProcessor(CRUDImplementationFactory crudFactory) {
this.crudFactory = crudFactory;
}
public QName getArtifactType() {
// Returns the qname of the XML element processed by this processor
return IMPLEMENTATION_CRUD;
}
public Class<CRUDImplementation> getModelType() {
// Returns the type of model processed by this processor
return CRUDImplementation.class;
}
public CRUDImplementation read(XMLStreamReader reader) throws ContributionReadException {
assert IMPLEMENTATION_CRUD.equals(reader.getName());
// Read an <implementation.crud> element
try {
// Read the directory attribute. This is where the sample
// CRUD implementation will persist resources.
String directory = reader.getAttributeValue(null, "directory");
// Create an initialize the CRUD implementation model
CRUDImplementation implementation = crudFactory.createCRUDImplementation();
implementation.setDirectory(directory);
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && IMPLEMENTATION_CRUD.equals(reader.getName())) {
break;
}
}
return implementation;
} catch (XMLStreamException e) {
throw new ContributionReadException(e);
}
}
public void resolve(CRUDImplementation impl, ModelResolver resolver) throws ContributionResolveException {
}
public void write(CRUDImplementation model, XMLStreamWriter outputSource) throws ContributionWriteException {
}
}
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