/*
* 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.contribution.processor.xml;
import java.io.StringReader;
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.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Extension;
import org.apache.tuscany.sca.common.xml.stax.StAXHelper;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.ExtensibleStAXArtifactProcessor;
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.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
public class AnyElementProcessor implements StAXArtifactProcessor<Extension> {
private AssemblyFactory assemblyFactory;
private StAXHelper helper;
public AnyElementProcessor(ExtensionPointRegistry extensionPoints, StAXArtifactProcessor<Object> extensionProcessor) {
FactoryExtensionPoint modelFactories = extensionPoints.getExtensionPoint(FactoryExtensionPoint.class);
assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
this.helper = StAXHelper.getInstance(extensionPoints);
}
public QName getArtifactType() {
return ExtensibleStAXArtifactProcessor.ANY_ELEMENT;
}
public Class<Extension> getModelType() {
return Extension.class;
}
/**
* Reads the contetns of the unknown elements and generates a custom
* implementation of XMLStreamReader i.e. XMLEventsStreamReader
*
* @param reader
* @return
* @throws XMLStreamException
*/
public Extension read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException {
QName name = reader.getName();
String xml = helper.saveAsString(reader);
Extension ext = assemblyFactory.createExtension();
ext.setQName(name);
ext.setValue(xml);
return ext;
}
/**
* Writes unknown portions back to the writer
*
* @param model
* @param writer
*/
public void write(Extension model, XMLStreamWriter writer, ProcessorContext context) throws XMLStreamException {
Object value = model.getValue();
if (!(value instanceof String)) {
return;
}
String xml = (String) value;
XMLStreamReader reader = helper.createXMLStreamReader(new StringReader(xml));
// Position the reader to the root element
reader.nextTag();
helper.save(reader, writer);
}
public void resolve(Extension model, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
}
}