root / branches / v2_0_0_prep / libraries / libRaster / src / org / gvsig / raster / grid / GridWriter.java @ 30008
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package org.gvsig.raster.grid; |
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import java.io.BufferedWriter; |
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import java.io.FileWriter; |
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import java.io.IOException; |
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import org.gvsig.raster.buffer.RasterBuffer; |
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import org.gvsig.raster.buffer.RasterBufferInvalidAccessException; |
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import org.gvsig.raster.dataset.IBuffer; |
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/**
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* Esta clase representa un grid para escritura
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class GridWriter{ |
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private RasterBuffer rasterBuf = null; |
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private GridExtent extent = null; |
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private int dataType = IBuffer.TYPE_UNDEFINED; |
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private int bandToOperate = 0; |
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/**
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* Asignaci?n del buffer de datos e inicializaci?n de variables.
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* @param ge Extent del grid
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* @param dataType Tipo de dato del grid
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* @param rasterBuf Buffer de datos del grid
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*/
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public GridWriter(GridExtent ge, int dataType, RasterBuffer rasterBuf){ |
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this.rasterBuf = rasterBuf;
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this.extent = ge;
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} |
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/**
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* Creaci?n del escritor de grid a trav?s de los par?metros de su extent. Con
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* ellos se crear? el GridExtent y el buffer de datos para escribir.
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* @param iNX Ancho en pixeles
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* @param iNY Alto en pixeles
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* @param dCellSize Tama?o de celda
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* @param dMinX Coordenada m?nima en X
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* @param dMinY Coordenada m?nima en Y
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* @param dataType Tipo de dato
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* @param bands Bandas a escribir
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*/
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public GridWriter(int iNX, int iNY, double dCellSize, |
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double dMinX, double dMinY, int dataType, |
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int[] bands) { |
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extent = new GridExtent();
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extent.setCellSize(dCellSize); |
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extent.setXRange(dMinX, dMinX + iNX * dCellSize); |
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extent.setYRange(dMinY, dMinY + iNY * dCellSize); |
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rasterBuf = RasterBuffer.getBuffer(dataType, iNX, iNY, bands.length, true);
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} |
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public void assign(byte value) throws RasterBufferInvalidAccessException { |
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try{
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rasterBuf.assign(bandToOperate, value); |
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}catch(ArrayIndexOutOfBoundsException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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}catch(NullPointerException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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} |
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} |
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public void assign(short value) throws RasterBufferInvalidAccessException { |
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try{
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rasterBuf.assign(bandToOperate, value); |
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}catch(ArrayIndexOutOfBoundsException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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}catch(NullPointerException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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} |
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} |
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public void assign(int value) throws RasterBufferInvalidAccessException { |
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try{
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rasterBuf.assign(bandToOperate, value); |
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}catch(ArrayIndexOutOfBoundsException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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}catch(NullPointerException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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} |
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} |
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public void assign(float value) throws RasterBufferInvalidAccessException { |
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try{
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rasterBuf.assign(bandToOperate, value); |
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}catch(ArrayIndexOutOfBoundsException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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}catch(NullPointerException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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} |
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} |
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public void assign(double value) throws RasterBufferInvalidAccessException { |
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try{
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rasterBuf.assign(bandToOperate, value); |
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}catch(ArrayIndexOutOfBoundsException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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}catch(NullPointerException e){ |
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throw new RasterBufferInvalidAccessException("Access to data type " + dataType + "invalid"); |
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} |
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} |
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public GridExtent getGridExtent() {
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return extent;
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} |
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public void setCellValue( int iX, int iY, byte value) throws OutOfGridException { |
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if (isCellInGrid(iX, iY))
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rasterBuf.setElem(iY, iX, bandToOperate, value); |
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else
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throw new OutOfGridException("Point:(" + iX + "," + iY + ") out of grid."); |
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} |
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public void setCellValue( int iX, int iY, short value) throws OutOfGridException { |
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if (isCellInGrid(iX, iY))
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rasterBuf.setElem(iY, iX, bandToOperate, value); |
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else
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throw new OutOfGridException("Point:(" + iX + "," + iY + ") out of grid."); |
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} |
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public void setCellValue( int iX, int iY, int value) throws OutOfGridException { |
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if (isCellInGrid(iX, iY))
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rasterBuf.setElem(iY, iX, bandToOperate, value); |
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else
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throw new OutOfGridException("Point:(" + iX + "," + iY + ") out of grid."); |
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} |
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public void setCellValue( int iX, int iY, float value) throws OutOfGridException { |
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if (isCellInGrid(iX, iY))
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rasterBuf.setElem(iY, iX, bandToOperate, value); |
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else
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throw new OutOfGridException("Point:(" + iX + "," + iY + ") out of grid."); |
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} |
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public void setCellValue( int iX, int iY, double value) throws OutOfGridException { |
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if (isCellInGrid(iX, iY))
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rasterBuf.setElem(iY, iX, bandToOperate, value); |
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else
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throw new OutOfGridException("Point:(" + iX + "," + iY + ") out of grid."); |
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} |
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public void setNoData( int iX, int iY) { |
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if (isCellInGrid(iX,iY))
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switch(rasterBuf.getDataType()) {
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case IBuffer.TYPE_BYTE: rasterBuf.setElem(iY, iX, bandToOperate, (byte)rasterBuf.getNoDataValue());break; |
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case IBuffer.TYPE_SHORT: rasterBuf.setElem(iY, iX, bandToOperate, (short)rasterBuf.getNoDataValue());break; |
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case IBuffer.TYPE_INT: rasterBuf.setElem(iY, iX, bandToOperate, (int)rasterBuf.getNoDataValue());break; |
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case IBuffer.TYPE_FLOAT: rasterBuf.setElem(iY, iX, bandToOperate, (float)rasterBuf.getNoDataValue());break; |
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case IBuffer.TYPE_DOUBLE: rasterBuf.setElem(iY, iX, bandToOperate, rasterBuf.getNoDataValue());break; |
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} |
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} |
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/**
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* Exporta a fichero ArcView ASCII pasandole el nombre del fichero a salvar. Esta
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* llamada afecta solo a la banda 0 del raster y es especial para MDT's y para conservar
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* la compatibilidad con c?digo que la usa de esta forma.
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*
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* @param sFile Nombre del fichero
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* @throws IOException
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* @throws NumberFormatException
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*/
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public void ExportToArcViewASCIIFile(String sFile) |
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throws IOException, NumberFormatException { |
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ExportToArcViewASCIIFile(sFile, bandToOperate); |
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} |
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/**
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* Exporta a fichero ArcView ASCII pasandole el nombre del fichero a salvar.
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* @param sFile Nombre del fichero
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* @param band
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* @throws IOException
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* @throws NumberFormatException
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*/
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public void ExportToArcViewASCIIFile(String sFile, int band) |
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throws IOException, NumberFormatException { |
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BufferedWriter fout = new BufferedWriter(new FileWriter(sFile)); |
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fout.write("ncols " + Integer.toString(extent.getNX())); |
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fout.newLine(); |
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fout.write("nrows " + Integer.toString(extent.getNY())); |
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fout.newLine(); |
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fout.write("xllcorner " + Double.toString(extent.minX())); |
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fout.newLine(); |
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fout.write("yllcorner " + Double.toString(extent.minY())); |
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fout.newLine(); |
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fout.write("cellsize " + Double.toString(extent.getCellSize())); |
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fout.newLine(); |
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fout.write("nodata_value " + Float.toString((float)rasterBuf.getNoDataValue())); |
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fout.newLine(); |
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switch(rasterBuf.getDataType()) {
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case IBuffer.TYPE_BYTE: for (int i = 0; i < extent.getNY(); i++) { |
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for (int j = 0; j < extent.getNX(); j++) |
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fout.write(Byte.toString(rasterBuf.getElemByte(i, j, band)/*[j][i]*/) + " "); |
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fout.newLine(); |
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} |
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break;
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case IBuffer.TYPE_SHORT:for (int i = 0; i < extent.getNY(); i++) { |
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for (int j = 0; j < extent.getNX(); j++) |
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fout.write(Short.toString(rasterBuf.getElemShort(i, j, band)/*[j][i]*/) + " "); |
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fout.newLine(); |
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} |
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break;
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case IBuffer.TYPE_INT: for (int i = 0; i < extent.getNY(); i++) { |
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for (int j = 0; j < extent.getNX(); j++) |
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fout.write(Integer.toString(rasterBuf.getElemInt(i, j, band)/*[j][i]*/) + " "); |
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fout.newLine(); |
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} |
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break;
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case IBuffer.TYPE_FLOAT:for (int i = 0; i < extent.getNY(); i++) { |
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for (int j = 0; j < extent.getNX(); j++) |
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fout.write(Float.toString(rasterBuf.getElemFloat(i, j, band)/*[j][i]*/) + " "); |
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fout.newLine(); |
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} |
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break;
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case IBuffer.TYPE_DOUBLE:for (int i = 0; i < extent.getNY(); i++) { |
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for (int j = 0; j < extent.getNX(); j++) |
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fout.write(Double.toString(rasterBuf.getElemDouble(i, j, band)/*[j][i]*/) + " "); |
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fout.newLine(); |
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} |
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break;
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} |
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fout.close(); |
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} |
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public void setNoDataValue(double noDataValue) { |
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rasterBuf.setNoDataValue(noDataValue); |
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} |
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/**
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* Consulta si el grid tiene la posici?n indicada por par?metro o si esta cae
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* fuera del ?rea.
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* @param iX Posici?n X
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* @param iY Posici?n Y
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* @return true si est? incluido en el Grid y false si no lo est?
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*/
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public boolean isCellInGrid(int iX, int iY) { |
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return (iX >= 0 && iX < extent.getNX() && iY >= 0 && iY < extent.getNY()); |
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} |
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/**
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* Asigna la banda sobre la que se realizan las operaciones. Por defecto es la banda 0
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* con lo que para el uso de MDTs no habr? que modificar este valor.
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* @param band Banda sobre la que se realizan las operaciones.
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*/
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public void setBandToOperate(int band) { |
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this.bandToOperate = band;
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} |
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/**
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* Releases buffer resources
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*/
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public void free() { |
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if (rasterBuf != null) { |
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rasterBuf.free(); |
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rasterBuf = null;
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} |
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} |
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} |