Metacat

        	// try system metadata only

        	try {

        		idExists = systemMetadataExisits(guid);

            } catch (McdbDocNotFoundException e2) {

            	idExists = false;

            }

    public boolean systemMetadataExisits(String guid)

			throws McdbDocNotFoundException {

		logMetacat.debug("looking up system metadata for guid " + guid);

		boolean exists = false;

		String query = "select guid from systemmetadata where guid = ?";

		DBConnection dbConn = null;

		int serialNumber = -1;

		try {

			// Get a database connection from the pool

			dbConn = DBConnectionPool.getDBConnection("IdentifierManager.systemMetadataExisits");

			serialNumber = dbConn.getCheckOutSerialNumber();

			// Execute the insert statement

			PreparedStatement stmt = dbConn.prepareStatement(query);

			stmt.setString(1, guid);

			ResultSet rs = stmt.executeQuery();

			if (rs.next()) {

				exists = true;

			} else {

				throw new McdbDocNotFoundException(

						"No system metadata registered for guid " + guid);

			}

		} catch (SQLException e) {

			logMetacat.error("Error while looking up the system metadata: "

					+ e.getMessage());

		} finally {

			// Return database connection to the pool

			DBConnectionPool.returnDBConnection(dbConn, serialNumber);

		}

		return exists;

	}