Retrieving spatial and non spatial in same query.

Question

I have hacked out queries that retrieve and display GEOM Vertices in a JSP using sdoapi.
I have hacked out queries that retrieve standard format data types and display them in JSP using jdbc, java.sql and oracle.sql.
I cannot figure out an easy way to blend the two. It seems as though there is no choice but to make two separate queries to the same table in the database in order to present all the columns of an entire row result if a row contains both spatial and standard data.
Does anyone have any ideas of how this can be done without making two separate calls??

Answer 1

I'm not sure why you need to print to a file or why you feel you need to do multiple queries to fetch spatial and non spatial attributes. Here are some snippets of SDOAPI based code that may help or may end up confusing matters even more. Hopefully they'll help. I assume you can modify the code to print coordinates to whichever output stream you require for displaying them. "..." indicates that some other code goes here.
DriverManager.registerDriver(new OracleDriver());
m_conn = DriverManager.getConnection(url, user, password);
m_adapter = OraSpatialManager.getGeometryAdapter("SDO", "9.0.1", STRUCT.class, STRUCT.class, null, m_conn);
Statement stmt = null;
ResultSet rs = null;
stmt = m_conn.createStatement();
String query = "SELECT " + idName + ", " + columnName + " FROM " + tableName;
rs = stmt.executeQuery(query);
while (rs.next())
Object id = rs.getObject(1);
Object sdoGeom = rs.getObject(2);
Geometry geometry = ((AdapterSDO)m_adapter).importGeometry(sdoGeom, nDim);
// do something with the ID column
// print the geometry's coordinates
processGeometry(geometry);
public void processGeometry(Geometry geometry)
if (geometry instanceof Point)
Point point = (Point) geometry;
System.out.println("Point: SRID = " + point.getSpatialReference().getID()+ " (" + point.getX() + ", " + point.getY() + ")");
else if (geometry instanceof LineString)
LineString lineString = (LineString) geometry;
System.out.println(lineString.getNumPoints() + "-point LineString: ");
for (Enumeration pointEnum = lineString.getPoints(); pointEnum.hasMoreElements();)
CoordPoint point = (CoordPoint) pointEnum.nextElement();
System.out.println("\t\t(" + point.getX() + ", " + point.getY() + ")");
else if (geometry instanceof Polygon)
Polygon polygon = (Polygon) geometry;
System.out.println((polygon.getNumRings()) + "-ring Polygon: ");
LineString exteriorRing = (LineString) polygon.getExteriorRing();
System.out.println("\t" + exteriorRing.getNumPoints() + "-point exterior ring:");
for (Enumeration pointEnum = exteriorRing.getPoints(); pointEnum.hasMoreElements();)
CoordPoint point = (CoordPoint) pointEnum.nextElement();
System.out.println("\t\t(" + point.getX() + ", " + point.getY() + ")");
for (Enumeration ringEnum = polygon.getInteriorRings(); ringEnum.hasMoreElements();)
LineString interiorRing = (LineString) ringEnum.nextElement();
System.out.println("\t" + interiorRing.getNumPoints() + "-point interior ring:");
for (Enumeration pointEnum = interiorRing.getPoints(); pointEnum.hasMoreElements();)
CoordPoint point = (CoordPoint) pointEnum.nextElement();
System.out.println("\t\t(" + point.getX() + ", " + point.getY() + ")");
...