EDIT

/**

 *  This class is responsible for generating a set of XML schemas for the CDM.

 *  It generates one XML schema per namespace from the JAXB annotations of the

 *  model classes. This class might be used in future to generate the

 *  initial version of the CDM schemas. Once the initially generated schemas 

 *  have been manually customized, CdmSchemaGenerator could be used to compare

 *  the customized XML schemas against the generated ones.

 */

package eu.etaxonomy.cdm.jaxb;

import java.io.IOException;

import java.io.StringReader;

import java.io.StringWriter;

import java.io.Writer;

import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBException;

import javax.xml.bind.SchemaOutputResolver;

import javax.xml.transform.Result;

import javax.xml.transform.stream.StreamSource;

import javax.xml.transform.stream.StreamResult;

import javax.xml.validation.Schema;

import javax.xml.validation.SchemaFactory;

import org.xml.sax.SAXException;

import eu.etaxonomy.cdm.model.DataSet;

/**

 * @author a.babadshanjan

 *

 */

public class CdmSchemaGenerator extends SchemaOutputResolver {

	private JAXBContext jaxbContext;

	StringWriter out = new StringWriter();

	public CdmSchemaGenerator() throws SAXException, JAXBException, IOException {

		jaxbContext = JAXBContext.newInstance(new Class[] {DataSet.class});

	}

	/** 

     * Prints one single generated schema on console.

	 * @see javax.xml.bind.SchemaOutputResolver#createOutput(java.lang.String, java.lang.String)

	 */

	@Override

	public Result createOutput(String namespaceUri, String filename) throws IOException {

		StreamResult res = new StreamResult(System.out);

		res.setSystemId(filename);

		return res;

	}

	/** 

     * Buffers one single generated schema.

	 * @see javax.xml.bind.SchemaOutputResolver#createOutput(java.lang.String, java.lang.String)

	 */

	public Schema createSchema() throws SAXException {

		Schema schema = 

		SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema").newSchema(

				new StreamSource( new StringReader(out.toString())));

		return schema;

	}

	public void writeSchema(DataSet dataSet, Writer writer) throws JAXBException, IOException, SAXException {

		CdmSchemaGenerator out = new CdmSchemaGenerator();

		jaxbContext.generateSchema(out);

		Schema implicitSchema = out.createSchema();

	}

}