Route in Oracle Spatial

Question

Hello!!
Work in a project in JAVA where I use network, would like to know if it is possible after I to trace a route I to show the direction of a point until the other, for example (It turns the right in the street…, it turns the left in the street…, walks 100 meters until…)
Grateful!!

Answer 1

Hi John! Debtor for answering me. I use the following code to trace a route:
public MapViewer efetuaRota(MapViewer mv, double coordX1, double coordY1, double coordX2, double coordY2, Network net, HttpServletRequest request)
throws NetworkDataException
logger.info("NavegacaoFacade: efetuaRota");
AcessoBase ab = new AcessoBase();
String mapSrid = "8292";
String lineStyle = "L.ROTA";
HashMap hm = null;
int nodeOrigem = 0;
int nodeDestino = 0;
//remove a rota existente
mv.removeAllLinearFeatures();
//Recupera o NODE de origem
String sqlOrigem = " SELECT NODE_ID FROM " + net.getNodeTableName()
+ " WHERE SDO_NN (" + net.getNodeGeomColumn() + ","
+ " SDO_GEOMETRY (2001, " + mapSrid + ", SDO_POINT_TYPE("
+ coordX1 + "," + coordY1 + ", NULL), NULL, NULL), "
+ " 'SDO_NUM_RES = 1') = 'TRUE'";
ResultSet rsOrigem = ab.executaQuerySQL(sqlOrigem);
//Recupera o NODE de destino
String sqlDestino = " SELECT NODE_ID FROM " + net.getNodeTableName()
+ " WHERE SDO_NN (" + net.getNodeGeomColumn() + ","
+ " SDO_GEOMETRY (2001, " + mapSrid + ", SDO_POINT_TYPE("
+ coordX2 + "," + coordY2 + ", NULL), NULL, NULL), "
+ " 'SDO_NUM_RES = 1') = 'TRUE'";
ResultSet rsDestino = ab.executaQuerySQL(sqlDestino);
try
if(rsOrigem != null)
while(rsOrigem.next())
nodeOrigem = rsOrigem.getInt("NODE_ID");
else
return null;
if(rsDestino != null)
while(rsDestino.next())
nodeDestino = rsDestino.getInt("NODE_ID");
else
return null;
catch(Exception e){
System.out.println("Erro ao executar a rota " + e.getMessage());
return null;
// Get path from mark to destination node
Path p = NetworkManager.shortestPath(net, nodeOrigem, nodeDestino);
// Check that we got a valid path back
if (p != null && p.getNoOfLinks() > 0) {
// Compute path geometry
p.computeGeometry(0.5);
JGeometry g = p.getGeometry();
// Add route geometry to map
mv.addLinearFeature (
g.getOrdinatesArray(), // Ordinates
8292, // SRID
lineStyle, // Line style
null, // Label column
null // Label style
else
return null;
try
mv.run();
catch(Exception e){}
return mv;
From this code I would like to know if he is possible I to get this reply that you passed me or if some method exists that returns me this segment.