root / org.gvsig.toolbox / trunk / org.gvsig.toolbox / org.gvsig.toolbox.algorithm / src / main / java / es / unex / sextante / topology / extractNodes / ExtractNodesAlgorithm.java @ 59
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package es.unex.sextante.topology.extractNodes; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import com.vividsolutions.jts.geom.Coordinate; |
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import com.vividsolutions.jts.geom.Geometry; |
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import com.vividsolutions.jts.geom.GeometryFactory; |
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import com.vividsolutions.jts.geom.Point; |
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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.outputs.OutputVectorLayer; |
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public class ExtractNodesAlgorithm |
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extends
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GeoAlgorithm { |
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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 void defineCharacteristics() { |
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setName(Sextante.getText("Extract_Nodes"));
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setGroup(Sextante.getText("Topology"));
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setUserCanDefineAnalysisExtent(true);
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try {
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m_Parameters.addInputVectorLayer(LAYER, Sextante.getText("Capa de entrada"), AdditionalInfoVectorLayer.SHAPE_TYPE_LINE,
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true);
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addOutputVectorLayer(RESULT, Sextante.getText("Nodes"), OutputVectorLayer.SHAPE_TYPE_POINT);
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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 = 0; |
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final IVectorLayer layerIn = m_Parameters.getParameterValueAsVectorLayer(ExtractNodesAlgorithm.LAYER);
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if (!m_bIsAutoExtent) {
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layerIn.addFilter(new BoundingBoxFilter(m_AnalysisExtent));
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} |
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final Class[] out_ftypes = new Class[1]; |
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out_ftypes[0] = Integer.class; |
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final String[] out_fnames = new String[1]; |
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out_fnames[0] = "DEGREE"; |
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final IVectorLayer driver = getNewVectorLayer(ExtractNodesAlgorithm.RESULT, Sextante.getText("Nodes"), |
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OutputVectorLayer.SHAPE_TYPE_POINT, out_ftypes, out_fnames); |
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final HashMap nodesHashMap = new HashMap(); |
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final GeometryFactory gf = new GeometryFactory(); |
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// STEP 01 - Get Nodes
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int count = 0; |
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int idx = 0; |
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final int iTotal = layerIn.getShapesCount(); |
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final IFeatureIterator iter = layerIn.iterator();
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idx = 0;
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while (iter.hasNext() && setProgress(count, iTotal)) {
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final IFeature feature = iter.next();
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final Coordinate[] coords = feature.getGeometry().getCoordinates(); |
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Point point = gf.createPoint(coords[0]); |
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processNode(nodesHashMap, point, count, feature, idx); |
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count++; |
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point = gf.createPoint(coords[coords.length - 1]);
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processNode(nodesHashMap, point, count, feature, idx); |
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setProgress(count, iTotal); |
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idx++; |
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} |
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iter.close(); |
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final Iterator nodesIter = nodesHashMap.values().iterator(); |
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while (nodesIter.hasNext() && setProgress(i, iTotal)) {
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final Node n = (Node) nodesIter.next();
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final Geometry g = n.getGeometry();
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final Object[] values = { n.getDegree() }; |
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driver.addFeature(g, values); |
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setProgress(i, iTotal); |
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i++; |
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} |
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iter.close(); |
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return !m_Task.isCanceled();
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} |
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public void processNode(final HashMap endpoints, |
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final Geometry point,
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final int count, |
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final IFeature feat,
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final int featIdx) { |
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if (!endpoints.containsKey(point.toText())) {
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final Node node = new Node(count, point, feat); |
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node.addConnectedLine(feat, featIdx); |
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endpoints.put(point.toText(), node); |
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} |
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else {
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//TODO What about SELF-LINE-NODES?
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final Node ep = (Node) endpoints.get(point.toText());
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ep.incrementDegree(); |
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ep.addConnectedLine(feat, featIdx); |
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} |
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} |
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} |