/**
* Populates the names array with the names of legends that can be applied to the given layer.
*
* @param layer Layer
*/
private void initNamesList(ILayer layer) {
// Recover the geometry type of this ILayer.
DataSource ds = layer.getDataManager().getDataSource();
int geometryColumnsCount = 0;
int geomType = GeometryTypeCodes.GEOMETRY;
try (Connection connection = ds.getConnection()) {
TableLocation tableLocation = TableLocation.parse(layer.getTableReference());
geomType = SFSUtilities.getGeometryType(connection, tableLocation, "");
geometryColumnsCount = SFSUtilities.getGeometryFields(connection, tableLocation).size();
} catch (SQLException e) {
LOGGER.warn("Could not determine the specific geometry type for " + "this layer.");
}
// Convert to a simple geometry.
int simpleGeomType = SimpleGeometryType.getSimpleType(geomType);
// Fill the names array.
ArrayList<String> typeNames = new ArrayList<>();
final int lineOrPolygon = SimpleGeometryType.LINE | SimpleGeometryType.POLYGON;
if ((simpleGeomType & SimpleGeometryType.ALL) != 0) {
typeNames.add(UniqueSymbolPoint.NAME);
if ((simpleGeomType & lineOrPolygon) != 0) {
typeNames.add(UniqueSymbolLine.NAME);
}
if ((simpleGeomType & SimpleGeometryType.POLYGON) != 0) {
typeNames.add(UniqueSymbolArea.NAME);
}
// Do not display the thematic maps that need an attribute if there is
// only one geometry
if (geometryColumnsCount > -1) {
typeNames.add(RecodedPoint.NAME);
if ((simpleGeomType & lineOrPolygon) != 0) {
typeNames.add(RecodedLine.NAME);
}
if ((simpleGeomType & SimpleGeometryType.POLYGON) != 0) {
typeNames.add(RecodedArea.NAME);
}
typeNames.add(ProportionalPoint.NAME);
if ((simpleGeomType & lineOrPolygon) != 0) {
typeNames.add(ProportionalLine.NAME);
}
typeNames.add(CategorizedPoint.NAME);
if ((simpleGeomType & lineOrPolygon) != 0) {
typeNames.add(CategorizedLine.NAME);
}
if ((simpleGeomType & SimpleGeometryType.POLYGON) != 0) {
typeNames.add(CategorizedArea.NAME);
}
}
}
names = typeNames.toArray(new String[typeNames.size()]);
}
/**
* Return the first spatial geometry field name
*
* @param tableName
* @param connection
* @return the name of the first geometry column
* @throws SQLException
*/
private static String getFirstGeometryField(String tableName, Connection connection)
throws SQLException {
// Find first geometry column
List<String> geomFields =
SFSUtilities.getGeometryFields(
connection,
TableLocation.parse(tableName, JDBCUtilities.isH2DataBase(connection.getMetaData())));
if (!geomFields.isEmpty()) {
return geomFields.get(0);
} else {
throw new SQLException("The table " + tableName + " does not contain a geometry field");
}
}
@Override
public ILayer createLayer(String layerName, String tableRef) throws LayerException {
try {
try (Connection connection = dataManager.getDataSource().getConnection()) {
List<String> geoFields =
SFSUtilities.getGeometryFields(connection, TableLocation.parse(tableRef));
if (!geoFields.isEmpty()) {
return new Layer(layerName, tableRef, dataManager);
} else {
throw new LayerException(I18N.tr("The source contains no spatial info"));
}
}
} catch (SQLException ex) {
throw new LayerException("Cannot retrieve spatial metadata", ex);
}
}
