@Override
public boolean processAlgorithm() throws GeoAlgorithmExecutionException {
final IVectorLayer layerIn = m_Parameters.getParameterValueAsVectorLayer(LAYER);
final double dTolerance = m_Parameters.getParameterValueAsDouble(TOLERANCE);
m_bPreserve = m_Parameters.getParameterValueAsBoolean(PRESERVE);
if (!m_bIsAutoExtent) {
layerIn.addFilter(new BoundingBoxFilter(m_AnalysisExtent));
}
final IVectorLayer output =
getNewVectorLayer(
RESULT,
Sextante.getText("Generalized_lines"),
IVectorLayer.SHAPE_TYPE_LINE,
layerIn.getFieldTypes(),
layerIn.getFieldNames());
final IFeatureIterator iter = layerIn.iterator();
int i = 0;
final int iCount = layerIn.getShapesCount();
while (iter.hasNext() && setProgress(i, iCount)) {
final IFeature feature = iter.next();
final Geometry simpleGeom = getSimpleLine(feature.getGeometry(), dTolerance);
output.addFeature(simpleGeom, feature.getRecord().getValues());
i++;
}
return !m_Task.isCanceled();
}
private void extractPoints() throws GeoAlgorithmExecutionException {
double dWeight;
m_Demand = new ArrayList();
m_Offer = new ArrayList();
m_Candidates = new ArrayList();
IFeatureIterator iter = m_DemandLayer.iterator();
while (iter.hasNext()) {
final IFeature feature = iter.next();
final Coordinate coord = feature.getGeometry().getCoordinate();
try {
dWeight = Double.parseDouble(feature.getRecord().getValue(m_iDemandField).toString());
} catch (final Exception e) {
dWeight = 1;
}
m_Demand.add(new DemandPoint(coord.x, coord.y, dWeight));
}
iter.close();
iter = m_CandidatesLayer.iterator();
while (iter.hasNext()) {
final IFeature feature = iter.next();
final Coordinate coord = feature.getGeometry().getCoordinate();
m_Candidates.add(coord);
}
iter.close();
if (m_OfferLayer != null) {
iter = m_OfferLayer.iterator();
while (iter.hasNext()) {
final IFeature feature = iter.next();
final Coordinate coord = feature.getGeometry().getCoordinate();
m_Offer.add(coord);
}
iter.close();
}
if ((m_Candidates.size() < m_iNewLocations) || (m_Demand.size() == 0)) {
throw new GeoAlgorithmExecutionException(Sextante.getText("Invalid_or_insufficient_data"));
}
}