import groovy.sql.Sql
import com.vividsolutions.jts.io.WKTReader
import com.vividsolutions.jts.io.WKBWriter
import com.vividsolutions.jts.geom.Geometry

def url = "jdbc:oracle:thin:@localhost:1521:TESTDB"
sql = Sql.newInstance(url,"username","password","oracle.jdbc.driver.OracleDriver")
WKTReader reader = new WKTReader()
WKBWriter writer = new WKBWriter()

String wkt = "LINESTRING (-92.3213354 20.368354, -92.383172 20.4760694, -92.4390244 20.603732)"
int objectid = 466

Geometry geom = reader.read(wkt)

byte[] wkb = writer.write(geom)

def stmt = """UPDATE FEATURE_TEST SET SHAPE = MDSYS.SDO_GEOMETRY(?,8307) WHERE OBJECTID = ?"""
sql.executeUpdate(stmt.toString(),[wkb,objectid])