Application: gvSIG desktop

		/*

			Comprobar que todas las variables que intervienen en la expresion 

			estan en el HasMap de parametros.

		 */

			for (Iterator iter = parser.getSymbolTable().values().iterator(); iter.hasNext();) {

				Variable variable = (Variable) iter.next();	

				if (!params.containsKey(variable.getName()))

					try {

						throw new NoAssignedVarsException();

					} catch (NoAssignedVarsException e) {

						RasterToolsUtil.messageBoxError(PluginServices.getText(this,"variables_sin_asignar"),this);

					}

			}

			// Construccion del rasterbuffer que recoge el resultado del calculo 

			rasterResult = RasterBuffer.getBuffer(RasterBuffer.TYPE_DOUBLE, resultExtent.getNX() ,resultExtent.getNY(), 1, true);

			// Calculo de grid resultante

			int iNX = resultExtent.getNX();

			int iNY = resultExtent.getNY();

			// Calculo de grid resultante

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

				if (cancel) return;  //Proceso cancelado 

				for(int y=0;y<iNY;y++){

					int i=0;

					for (Iterator iter = params.keySet().iterator(); iter.hasNext();) {

						String varName = (String)iter.next();

						Object data[]= (Object[])params.get(varName);

						inputBuffer= (RasterBuffer)data[0];

						int dataType= ((Integer)data[1]).intValue();

						double value=0;

						//	BUFFER TIPO_BYTE

						if(dataType == RasterBuffer.TYPE_BYTE){		

							value = inputBuffer.getElemByte(y, x, 0);			

							if(value!=inputBuffer.getNoDataValue()){	

								parser.setVarValue(varName,new Double(value));

								i++;					

							}

							else{					

								rasterResult.setElem(y, x, 0, rasterResult.noDataValue);

								break;	

							}					

						//	BUFFER TIPO_SHORT										

						else if(dataType== RasterBuffer.TYPE_SHORT){	

							value = inputBuffer.getElemShort(y, x, 0);	

							if(value!=inputBuffer.getNoDataValue()){

								parser.setVarValue(varName,new Double(value));

								i++;

							}

							else{

								rasterResult.setElem(y, x, 0, rasterResult.noDataValue);

								break;

								}		

						//	BUFFER TIPO_INT					

						else if(dataType == RasterBuffer.TYPE_INT){	

							value = inputBuffer.getElemInt(y, x,0);

							if(value!=inputBuffer.getNoDataValue()){

								parser.setVarValue(varName,new Double(value));

								i++;

							}

							else{

								rasterResult.setElem(y, x, 0, rasterResult.noDataValue);

								break;

							}	

						//	BUFFER TIPO_FLOAT										

						else if(dataType == RasterBuffer.TYPE_FLOAT){

							value = inputBuffer.getElemFloat(x, y,0);

							if(value!=inputBuffer.getNoDataValue()){

									parser.setVarValue(varName,new Double(value));

									i++;

							}

							else{

								rasterResult.setElem(y, x, 0, rasterResult.noDataValue);

								break;

								}		

						}

						//	BUFFER TIPO_DOUBLE					

						else if(dataType == RasterBuffer.TYPE_DOUBLE){

							value = inputBuffer.getElemDouble(y, x,0);

							if(value!=inputBuffer.getNoDataValue()){

							}

							else{

								rasterResult.setElem(y, x, 0, rasterResult.noDataValue);

								break;

							}	

					}	

					// Evaluacion de la exprsion en el x,y.

					if (i == params.size()){

						rasterResult.setElem(y, x, 0, (double)parser.getValue());

						percent = x*100/rasterResult.getWidth();

					}	

				}		

			}

			// Escritura de los datos a disco

			writeToFile();