コード例 #1
0
  @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();
  }
コード例 #2
0
  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"));
    }
  }