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package org.apache.tuscany.sca.core.databinding.transformers;
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.transform.Source;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import javax.xml.bind.annotation.adapters.XmlAdapter;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.impl.builder.StAXOMBuilder;
import org.apache.tuscany.sca.databinding.xml.XMLStreamReader2String;
/**
* This special XmlAdapter can be used by JAXB classes to convert from OMElement to Source
*/
public class OMElementXMLAdapter extends XmlAdapter<Source, OMElement> {
private TransformerFactory transformerFactory = TransformerFactory.newInstance();
private XMLInputFactory inputFactory = XMLInputFactory.newInstance();
@Override
public Source marshal(OMElement v) throws Exception {
XMLStreamReader reader = v.getXMLStreamReaderWithoutCaching();
XMLStreamReader2String t2 = new XMLStreamReader2String();
String xml = t2.transform(reader, null);
return new StreamSource(new StringReader(xml));
}
@Override
public OMElement unmarshal(Source v) throws Exception {
StringWriter sw = new StringWriter();
StreamResult result = new StreamResult(sw);
transformerFactory.newTransformer().transform(v, result);
XMLStreamReader reader = inputFactory.createXMLStreamReader(new StringReader(sw.toString()));
// Build OMElement from XMLStreamReader
StAXOMBuilder builder = new StAXOMBuilder(reader);
return builder.getDocumentElement();
}
}
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