D-Net

package eu.dnetlib.enabling.is.registry.schema;

import java.io.StringReader;

import javax.xml.XMLConstants;

import javax.xml.transform.stream.StreamSource;

import javax.xml.validation.Schema;

import javax.xml.validation.SchemaFactory;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.springframework.beans.factory.annotation.Required;

import org.xml.sax.SAXException;

import eu.dnetlib.rmi.enabling.ISLookUpException;

import eu.dnetlib.rmi.enabling.ISLookUpService;

/**

 * manages the resource schemas through the registry service.

 * 

 * @author marko

 * 

 */

public class ResourceSchemaDAOImpl implements ResourceSchemaDAO {

	private ISLookUpService isLookup;

	/**

	 * logger.

	 */

	private static final Log log = LogFactory.getLog(ResourceSchemaDAOImpl.class); // NOPMD by marko on 11/24/08 5:02 PM

	/**

	 * {@inheritDoc}

	 * 

	 * @see eu.dnetlib.enabling.is.registry.schema.ResourceSchemaDAO#getResourceSchema(java.lang.String)

	 */

	@Override

	public Schema getResourceSchema(final String resourceType) {

		try {

			final String schemaSource = isLookup.getResourceTypeSchema(resourceType);

			if (schemaSource == null || schemaSource.isEmpty()) {

				log.warn("cannot find resource type " + resourceType);

				return null;

			}

			return SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema(new StreamSource(new StringReader(schemaSource)));

		} catch (ISLookUpException e) {

			log.warn("cannot find resource type" + resourceType, e);

			return null;

		} catch (SAXException e) {

			log.fatal("cannot parse resource type schema", e);

			return null;

		}

	}

	public ISLookUpService getIsLookup() {

		return isLookup;

	}

	@Required

	public void setIsLookup(final ISLookUpService isLookup) {

		this.isLookup = isLookup;

	}

}