Using the DB2 spatial data source

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The IlvDB2DataSource class is an IlvMapDataSource for reading georeferenced objects from a DB2® spatial database. It wraps up all operations (connecting to database, reading features, rendering them to graphic objects) in a convenient way.

To read a map stored in an DB2 spatial database:

Create a connection to the DB2 Spatial database:

IlvDB2ConnectionInfo theDB2Connection=new IlvDB2ConnectionInfo();
theDB2Connection.setHostName("server_hostname");        
theDB2Connection.setHostPort("50001");
theDB2Connection.setUser("a_db2_user");
theDB2Connection.setPassword("password");
theDB2Connection.setDatabaseName("database_name")

Create a data source with this connection as a parameter:

// we want to fetch layer "A_DB2_USER.FLOODZONES.LOCATION.SRID=100002"
String layerName="A_DB2_USER.FLOODZONES.LOCATION.SRID=100002";
IlvDB2DataSource dataSource=new IlvDB2DataSource(DB2Connection, layerName);

To obtain a list of layers, see Getting a list of layers

Set parameters on this data source to use load-on-demand, if needed:

boolean useTiling = true;
int rowCount = 5;
int columnCount = 5;
dataSource.setTilingParameters(useTiling, rowCount, columnCount);

Connect this data source to the manager of the view:
```
dataSource.setManager(getView().getManager());
```
Insert the data source map layer into the layer tree (You first need to retrieve the layer model from the property of the manager):
```
IlvMapLayerTreeModel mltm = IlvMapLayerTreeProperty.GetMapLayerTreeModel(v.getManager());
mltm.addChild(null, dataSource.getInsertionLayer());
```
Insert the data source into the data source tree. You first need to retrieve the data source model from the property of the manager:
```
IlvMapDataSourceModel dataSourceModel = 
IlvMapDataSourceProperty.GetMapDataSourceModel(manager);
dataSourceModel.insert(dataSource);
```
Finally, start the data source (or the whole model, if you have more than one data source):
```
dataSource.start();
```

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The IBM spatial database readers