xuml.tools.miuml.metamodel.extensions.jaxb.Marshaller Maven / Gradle / Ivy

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Contains miUML metamodel schema and xuml-tools extensions schema and generates JAXB classes from those schemas.

There is a newer version: 0.6

package xuml.tools.miuml.metamodel.extensions.jaxb;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.ValidationEvent;
import javax.xml.bind.ValidationEventHandler;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;

import org.w3c.dom.Node;
import org.xml.sax.SAXException;

import com.google.common.base.Preconditions;

/**
 * Marshalls and unmarshalls xuml-tools extensions to the miuml metamodel
 * schema.
 * 
 * @author dave
 * 
 */
public class Marshaller {

	private Unmarshaller unmarshaller;

	/**
	 * Constructor.
	 * 
	 */
	public Marshaller() {

		try {
			JAXBContext context = JAXBContext.newInstance(ObjectFactory.class);
			unmarshaller = context.createUnmarshaller();
			SchemaFactory sf = SchemaFactory
					.newInstance(javax.xml.XMLConstants.W3C_XML_SCHEMA_NS_URI);
			Schema schema = sf.newSchema(getClass().getResource(
					"/xuml-tools-miuml-metamodel-extensions.xsd"));
			unmarshaller.setSchema(schema);
			unmarshaller.setEventHandler(new ValidationEventHandler() {
				@Override
				public boolean handleEvent(ValidationEvent event) {
					throw new RuntimeException(event.getMessage(), event
							.getLinkedException());
				}
			});
		} catch (JAXBException e) {
			throw new RuntimeException(e);
		} catch (SAXException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * Unmarshalls a {@link Node} to a JAXB object from the xuml-tools miuml
	 * extensions schema.
	 * 
	 * @param node
	 * @return
	 * @throws JAXBException
	 */
	public synchronized Object unmarshal(Node node) throws JAXBException {
		Preconditions.checkNotNull(node, "Node is null!");
		return unmarshaller.unmarshal(node);
	}

}