root / org.gvsig.toolbox / trunk / org.gvsig.toolbox / org.gvsig.toolbox.algorithm / src / main / java / es / unex / sextante / tables / filterVector / FilterVectorAlgorithm.java @ 59
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package es.unex.sextante.tables.filterVector; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.Set; |
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import org.nfunk.jep.JEP; |
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import es.unex.sextante.additionalInfo.AdditionalInfoVectorLayer; |
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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.IFeature; |
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import es.unex.sextante.dataObjects.IFeatureIterator; |
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import es.unex.sextante.dataObjects.IVectorLayer; |
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import es.unex.sextante.dataObjects.vectorFilters.BoundingBoxFilter; |
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import es.unex.sextante.exceptions.GeoAlgorithmExecutionException; |
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import es.unex.sextante.exceptions.RepeatedParameterNameException; |
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import es.unex.sextante.gui.modeler.ModelAlgorithm; |
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import es.unex.sextante.modeler.elements.ModelElementNumericalValue; |
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public class FilterVectorAlgorithm |
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extends
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GeoAlgorithm { |
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public static final String FORMULA = "FORMULA"; |
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public static final String LAYER = "LAYER"; |
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public static final String RESULT = "RESULT"; |
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@Override
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public boolean processAlgorithm() throws GeoAlgorithmExecutionException { |
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int i, j;
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double dValue;
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String sVariable;
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final IVectorLayer layer = m_Parameters.getParameterValueAsVectorLayer(LAYER);
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if (!m_bIsAutoExtent) {
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layer.addFilter(new BoundingBoxFilter(m_AnalysisExtent));
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} |
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final IVectorLayer outputLayer = getNewVectorLayer(RESULT, layer.getName(), layer.getShapeType(), layer.getFieldTypes(),
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layer.getFieldNames()); |
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final JEP jep = new JEP(); |
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jep.addStandardConstants(); |
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jep.addStandardFunctions(); |
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String sFormula = m_Parameters.getParameterValueAsString(FORMULA).toLowerCase();
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sFormula = sFormula.replaceAll(" ", ""); |
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sFormula = replaceDots(sFormula); |
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final String[] fieldNames = layer.getFieldNames(); |
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final ArrayList variables = new ArrayList(); |
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final ArrayList variableIndex = new ArrayList(); |
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for (i = 0; i < fieldNames.length; i++) { |
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sVariable = fieldNames[i].toLowerCase(); |
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sVariable = sVariable.replaceAll(" ", ""); |
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sVariable = replaceDots(sVariable); |
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if (sFormula.lastIndexOf(sVariable) != -1) { |
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jep.addVariable(sVariable, 0.0);
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variables.add(sVariable); |
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variableIndex.add(new Integer(i)); |
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} |
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} |
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final int[] iVariables = new int[variables.size()]; |
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final String[] sVariables = new String[variables.size()]; |
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for (i = 0; i < variableIndex.size(); i++) { |
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iVariables[i] = ((Integer) variableIndex.get(i)).intValue();
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sVariables[i] = (String) variables.get(i);
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} |
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sFormula = "if(" + sFormula + ",1,0)"; |
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jep.parseExpression(sFormula); |
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int iCount = 0; |
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final int iTotalCount = layer.getShapesCount(); |
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if (!jep.hasError()) {
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final IFeatureIterator iter = layer.iterator();
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IFeature feat; |
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while (iter.hasNext() && setProgress(iCount, iTotalCount)) {
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feat = iter.next(); |
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for (j = 0; (j < iVariables.length); j++) { |
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String sValue = null; |
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try {
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sValue = feat.getRecord().getValue(iVariables[j]).toString(); |
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dValue = Double.parseDouble(sValue);
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jep.addVariable(sVariables[j], dValue); |
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} |
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catch (final NumberFormatException nfe) { |
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jep.addVariable(sVariables[j], sValue.toLowerCase()); |
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} |
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} |
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dValue = jep.getValue(); |
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if ((dValue != 0) && !Double.isNaN(dValue)) { |
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outputLayer.addFeature(feat); |
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} |
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iCount++; |
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} |
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} |
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else {
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throw new GeoAlgorithmExecutionException(jep.getErrorInfo()); |
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} |
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return !m_Task.isCanceled();
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} |
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@Override
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public void defineCharacteristics() { |
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setName(Sextante.getText("Filter_vector"));
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setGroup(Sextante.getText("Tools_for_vector_layers"));
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setUserCanDefineAnalysisExtent(true);
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try {
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m_Parameters.addInputVectorLayer(LAYER, Sextante.getText("Layer"), AdditionalInfoVectorLayer.SHAPE_TYPE_ANY, true); |
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m_Parameters.addString(FORMULA, Sextante.getText("Formula"));
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addOutputVectorLayer(RESULT, Sextante.getText("Result"));
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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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private String replaceDots(final String s) { |
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char c, c2;
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StringBuffer sb = new StringBuffer(s); |
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for (int i = 0; i < sb.length() - 1; i++) { |
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c = sb.charAt(i); |
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c2 = sb.charAt(i + 1);
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if ((c == '.') && !Character.isDigit(c2)) { |
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sb = sb.deleteCharAt(i); |
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} |
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} |
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return sb.toString();
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} |
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@Override
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public boolean preprocessForModeller(final Object obj) throws GeoAlgorithmExecutionException { |
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final ModelAlgorithm model = (ModelAlgorithm) obj;
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String sFormula = m_Parameters.getParameterValueAsString(FORMULA);
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final HashMap inputs = model.getInputs(); |
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final Set set = inputs.keySet(); |
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final Iterator iter = set.iterator(); |
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while (iter.hasNext()) {
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final Object key = iter.next(); |
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final Object input = inputs.get(key); |
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if (input instanceof ModelElementNumericalValue) { |
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if (sFormula.contains(((String) key))) { |
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return false; |
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} |
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} |
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if (sFormula.contains((String) key)) { |
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sFormula = sFormula.replace(key.toString(), input.toString()); |
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} |
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} |
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m_Parameters.getParameter(FORMULA).setParameterValue(sFormula); |
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return true; |
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} |
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} |