root / org.gvsig.toolbox / trunk / org.gvsig.toolbox / org.gvsig.toolbox.algorithm / src / main / java / es / unex / sextante / gridStatistics / base / MultiGridStatsBaseAlgorithm.java @ 59
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package es.unex.sextante.gridStatistics.base; |
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import java.awt.image.DataBuffer; |
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import java.util.ArrayList; |
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import es.unex.sextante.additionalInfo.AdditionalInfoMultipleInput; |
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import es.unex.sextante.core.GeoAlgorithm; |
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import es.unex.sextante.core.Sextante; |
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import es.unex.sextante.dataObjects.IRasterLayer; |
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import es.unex.sextante.exceptions.GeoAlgorithmExecutionException; |
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import es.unex.sextante.exceptions.RepeatedParameterNameException; |
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public abstract class MultiGridStatsBaseAlgorithm |
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extends
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GeoAlgorithm { |
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public static final String INPUT = "INPUT"; |
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public static final String FORCE_NODATA = "NODATA"; |
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public static final String RESULT = "RESULT"; |
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protected double NO_DATA; |
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@Override
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public void defineCharacteristics() { |
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setUserCanDefineAnalysisExtent(true);
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try {
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m_Parameters.addMultipleInput(INPUT, Sextante.getText("Layers"), AdditionalInfoMultipleInput.DATA_TYPE_RASTER, true); |
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m_Parameters.addBoolean(FORCE_NODATA, Sextante.getText("Force_no-data_value"), true); |
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addOutputRasterLayer(RESULT, this.getName());
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} |
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catch (final RepeatedParameterNameException e) { |
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Sextante.addErrorToLog(e); |
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} |
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} |
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@Override
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public boolean processAlgorithm() throws GeoAlgorithmExecutionException { |
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int i;
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int x, y;
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int iNX, iNY;
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double dValue;
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IRasterLayer[] window;
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NO_DATA = m_OutputFactory.getDefaultNoDataValue(); |
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final ArrayList input = m_Parameters.getParameterValueAsArrayList("INPUT"); |
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final boolean bForceNoData = m_Parameters.getParameterValueAsBoolean("NODATA"); |
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if (input.size() == 0) { |
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return false; |
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} |
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final IRasterLayer result = getNewRasterLayer(RESULT, this.getName(), IRasterLayer.RASTER_DATA_TYPE_DOUBLE); |
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result.setNoDataValue(m_OutputFactory.getDefaultNoDataValue()); |
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result.assignNoData(); |
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window = new IRasterLayer[input.size()];
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for (i = 0; i < input.size(); i++) { |
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window[i] = (IRasterLayer) input.get(i); |
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window[i].setWindowExtent(result.getWindowGridExtent()); |
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if ((window[i].getDataType() == DataBuffer.TYPE_FLOAT) || (window[i].getDataType() == DataBuffer.TYPE_DOUBLE)) { |
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window[i].setInterpolationMethod(IRasterLayer.INTERPOLATION_BSpline); |
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} |
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else {
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window[i].setInterpolationMethod(IRasterLayer.INTERPOLATION_NearestNeighbour); |
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} |
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} |
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iNX = window[0].getNX();
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iNY = window[0].getNY();
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final double dValues[] = new double[input.size()]; |
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for (y = 0; (y < iNY) && setProgress(y, iNY); y++) { |
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for (x = 0; x < iNX; x++) { |
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for (i = 0; i < window.length; i++) { |
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dValue = window[i].getCellValueAsDouble(x, y); |
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if (!window[i].isNoDataValue(dValue)) {
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dValues[i] = dValue; |
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} |
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else {
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if (bForceNoData) {
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result.setNoData(x, y); |
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break;
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} |
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else {
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dValues[i] = m_OutputFactory.getDefaultNoDataValue(); |
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} |
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} |
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} |
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result.setCellValue(x, y, processValues(dValues)); |
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} |
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} |
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return !m_Task.isCanceled();
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} |
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protected abstract double processValues(double[] dValues); |
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} |