package pt.utl.ist.sotis.sherparomeo.conversion;

import java.io.StringReader;

import javax.xml.XMLConstants;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;

import org.xml.sax.SAXException;

import pt.utl.ist.sotis.conversion.ConversionException;
import pt.utl.ist.sotis.sherpa.Romeoapi;

public class SherpaRomeoUnmarshaller {
    public static Romeoapi parse(StringBuffer strBuf) throws ConversionException {
        try {
            JAXBContext jc = JAXBContext.newInstance("pt.utl.ist.sotis.sherpa");
            Unmarshaller unmarshaller = jc.createUnmarshaller();

            Schema schema =
                    SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema(
                            SherpaRomeoUnmarshaller.class.getResource("/sherpa.xsd"));
            unmarshaller.setSchema(schema);

            StreamSource stream = new StreamSource(new StringReader(strBuf.toString()));

            return (Romeoapi) unmarshaller.unmarshal(stream);
        }

        catch (JAXBException e) {
            throw new ConversionException(e);
        } catch (TransformerFactoryConfigurationError e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        }
        return null;
    }
}