svn-gvsig-desktop / tags / v1_1_2_Build_1044 / prototypes / VectorialAvanzado / extensions / extGraph / src / com / iver / cit / gvsig / graph / core / loaders / NetworkRedLoader.java @ 20099
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.gvsig.graph.core.loaders; |
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import java.io.File; |
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import java.io.FileNotFoundException; |
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import java.io.IOException; |
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import java.io.RandomAccessFile; |
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import java.nio.ByteOrder; |
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import java.nio.MappedByteBuffer; |
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import java.nio.channels.FileChannel; |
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import com.iver.cit.gvsig.graph.core.EdgePair; |
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import com.iver.cit.gvsig.graph.core.GvEdge; |
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import com.iver.cit.gvsig.graph.core.GvGraph; |
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import com.iver.cit.gvsig.graph.core.GvNode; |
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import com.iver.cit.gvsig.graph.core.IGraph; |
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import com.iver.cit.gvsig.graph.core.INetworkLoader; |
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/**
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* @author fjp
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*
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* Primero vienen los arcos, y luego los nodos. En la cabecera, 3 enteros
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* con el numero de tramos, el de arcos y el de nodos.
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*
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*/
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public class NetworkRedLoader implements INetworkLoader { |
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private File netFile = new File("c:/ejes.net"); |
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public IGraph loadNetwork() {
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long t1 = System.currentTimeMillis(); |
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int numArcs;
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int numEdges;
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int numNodes;
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short sentidoDigit; // => 1 en esa direcci?n. 0=> Al contrario. SOLO |
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// SE UTILIZA PARA LOS CALCULOS POR IDTRAMO Y
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// PORCENTAJE
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// PARA SABER SI EST? M?S CERCA DE UN NODO O DEL OTRO.
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RandomAccessFile file;
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try {
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file = new RandomAccessFile(netFile.getPath(), |
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"r");
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FileChannel channel = file.getChannel();
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MappedByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size()); |
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buf.order(ByteOrder.LITTLE_ENDIAN);
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numArcs = buf.getInt(); |
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numEdges = buf.getInt(); |
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numNodes = buf.getInt(); |
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GvGraph g = new GvGraph(numArcs, numEdges, numNodes);
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// Nodes
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// NOTE: EDGES ARE WRITEN BEFORE. LOOK TO NetworkFileRedWriter.
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// output.writeInt(id); 4
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// output.writeInt(sense); 4
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//
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// output.writeInt(idNodeOrig); 4
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// output.writeInt(idNodeEnd); 4
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// output.writeInt(tipoTramo); 4
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// output.writeDouble(dist); 8
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// output.writeDouble(cost); 8
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// TOTAL = 5x4 + 2x8 = 20 + 16 = 36 bytes /edge
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buf.position(36*numEdges + 12); |
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for (int i=0; i < numNodes; i++) |
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{ |
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GvNode node = readNode(buf); |
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g.addNode(node); |
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} |
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// Arcos
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buf.position(12);
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for (int i=0; i < numEdges; i++) |
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{ |
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GvEdge edge = readEdge(buf); |
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edge.setIdEdge(i); |
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g.addEdge(edge); |
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GvNode node = g.getNodeByID(edge.getIdNodeOrig()); |
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node.getEnlaces().add(edge); |
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EdgePair edgePair = g.getEdgesByIdArc(edge.getIdArc()); |
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if (edgePair == null) |
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{ |
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edgePair = new EdgePair();
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g.addEdgePair(edge.getIdArc(), edgePair); |
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} |
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if (edge.getDirec() == 1) |
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edgePair.setIdEdge(i); |
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else
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edgePair.setIdInverseEdge(i); |
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} |
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long t2 = System.currentTimeMillis(); |
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System.out.println("Tiempo de carga: " + (t2-t1) + " msecs"); |
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System.out.println("NumEdges = " + g.numEdges()); |
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return g;
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} catch (FileNotFoundException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} catch (IOException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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return null; |
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} |
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// public Graph loadJungNetwork()
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// {
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// SparseGraph g = new SparseGraph();
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// long t1 = System.currentTimeMillis();
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//
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// RandomAccessFile file;
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// try {
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// file = new RandomAccessFile(netFile.getPath(),
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// "r");
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// FileChannel channel = file.getChannel();
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// MappedByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
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// buf.order(ByteOrder.LITTLE_ENDIAN);
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//
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// int numArcs = buf.getInt();
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// int numEdges = buf.getInt();
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// int numNodes = buf.getInt();
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//
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// // Nodes
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// buf.position(24*numEdges + 12);
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// for (int i=0; i < numNodes; i++)
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// {
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// GvNode node = readNode(buf);
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//
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// Vertex v = new DirectedSparseVertex();
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//// v.addUserDatum("ID", node.idNode, UserData.CLONE);
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//// v.addUserDatum("X", node.x, UserData.CLONE);
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//// v.addUserDatum("Y", node.y, UserData.CLONE);
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// // v_locations.setLocation(v, new Point2D.Double(x.doubleValue(),y.doubleValue()));
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// g.addVertex(v);
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// }
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// Indexer indexer = Indexer.getIndexer(g);
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//
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// buf.position(12);
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// for (int i=0; i < numEdges; i++)
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// {
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// GvEdge edge = readEdge(buf);
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//
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// int nodeOrig = edge.getIdNodeOrig();
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// int nodeEnd = edge.getIdNodeEnd();
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//
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// Vertex vFrom = (Vertex) indexer.getVertex(nodeOrig);
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// Vertex vTo = (Vertex) indexer.getVertex(nodeEnd);
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//
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// DirectedSparseEdge edgeJ = new DirectedSparseEdge(vFrom, vTo);
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// g.addEdge(edgeJ);
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// }
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// long t2 = System.currentTimeMillis();
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// System.out.println("Tiempo de carga: " + (t2-t1) + " msecs");
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// return g;
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// } catch (FileNotFoundException e) {
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// // TODO Auto-generated catch block
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// e.printStackTrace();
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// } catch (IOException e) {
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// // TODO Auto-generated catch block
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// e.printStackTrace();
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// }
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// return null;
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// }
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private GvNode readNode(MappedByteBuffer buf) { |
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GvNode node = new GvNode();
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node.setIdNode(buf.getInt()); |
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node.setX(buf.getDouble()); |
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node.setY(buf.getDouble()); |
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return node;
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} |
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private GvEdge readEdge(MappedByteBuffer buf) { |
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GvEdge edge = new GvEdge();
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// memcpy(&Arcos[link_num].idTramo,puntero,sizeof(long));
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edge.setIdArc(buf.getInt()); |
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// Sentido de digitalizaci?n.Un 1 indica que va en ese sentido, un cero al contrario.
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// memcpy(&Arcos[link_num].sentido,puntero,sizeof(int));
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edge.setDirec(buf.getInt()); |
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// idNodeOrig
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edge.setIdNodeOrig(buf.getInt()); |
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// memcpy(&node_num1,puntero,sizeof(long));
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// idNodeEnd
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edge.setIdNodeEnd(buf.getInt()); |
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// memcpy(&node_num2,puntero,sizeof(long));
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// Read the link costs.
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// Type
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edge.setType(buf.getInt()); |
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// memcpy(&Arcos[link_num].TipoTramo,puntero,sizeof(int));
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// Distance
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edge.setDistance(buf.getDouble()); |
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edge.setWeight(buf.getDouble()); |
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// memcpy(&Arcos[link_num].Coste2,puntero,sizeof(float));
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// pNodo1 = &Nodos[node_num1];
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// Arcos[link_num].idNodo1 = node_num1;
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//
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// Arcos[link_num].idNodo2 = node_num2;
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// pNodo2->Enlaces.Add(link_num);
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// // NUEVO 11-JUL-2002
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// if (Arcos[link_num].sentido)
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// IndiceArcos[Arcos[link_num].idTramo].idArco = link_num;
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// else
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// IndiceArcos[Arcos[link_num].idTramo].idContraArco = link_num;
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//
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// // NUEVO 27-JUL-2003
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// Arcos[link_num].numSoluc = 0;
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//
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// // NUEVO 23_2_2005
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// CreaConectores(link_num);
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return edge;
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} |
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/**
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* @param args
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*/
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public static void main(String[] args) { |
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NetworkRedLoader redLoader = new NetworkRedLoader();
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redLoader.loadNetwork(); |
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// redLoader.loadJungNetwork();
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} |
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public File getNetFile() { |
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return netFile;
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} |
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public void setNetFile(File netFile) { |
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this.netFile = netFile;
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} |
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} |
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