Application: gvSIG desktop » gvSIG tools: ToolBox

package es.unex.sextante.gridTools.invertNoData;

import es.unex.sextante.core.GeoAlgorithm;

import es.unex.sextante.core.Sextante;

import es.unex.sextante.dataObjects.IRasterLayer;

import es.unex.sextante.exceptions.GeoAlgorithmExecutionException;

import es.unex.sextante.exceptions.RepeatedParameterNameException;

public class InvertNoDataAlgorithm

         extends

            GeoAlgorithm {

   public static final String RESULT = "RESULT";

   public static final String INPUT  = "INPUT";

   @Override

   public void defineCharacteristics() {

      setName(Sextante.getText("Invert_mask"));

      setGroup(Sextante.getText("Basic_tools_for_raster_layers"));

      setUserCanDefineAnalysisExtent(true);

      try {

         m_Parameters.addInputRasterLayer(INPUT, Sextante.getText("Layer"), true);

         addOutputRasterLayer(RESULT, Sextante.getText("Inverted_mask"));

      }

      catch (final RepeatedParameterNameException e) {

         Sextante.addErrorToLog(e);

      }

   }

   @Override

   public boolean processAlgorithm() throws GeoAlgorithmExecutionException {

      int x, y;

      int iNX, iNY;

      double dValue;

      IRasterLayer input;

      input = m_Parameters.getParameterValueAsRasterLayer(INPUT);

      final IRasterLayer result = getNewRasterLayer(RESULT, Sextante.getText("Inverted_mask"), IRasterLayer.RASTER_DATA_TYPE_BYTE);

      result.setNoDataValue(0.0);

      input.setWindowExtent(result.getWindowGridExtent());

      iNX = result.getWindowGridExtent().getNX();

      iNY = result.getWindowGridExtent().getNY();

      for (y = 0; (y < iNY) && setProgress(y, iNY); y++) {

         for (x = 0; x < iNX; x++) {

            dValue = input.getCellValueAsDouble(x, y);

            if (input.isNoDataValue(dValue)) {

               result.setCellValue(x, y, 1.0);

            }

            else {

               result.setNoData(x, y);

            }

         }

      }

      return !m_Task.isCanceled();

   }

}