Java tutorial
/* Copyright 2008-2011 Gephi Authors : Sebastien Heymann <seb@gephi.org> Website : http://www.gephi.org This file is part of Gephi. DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. Copyright 2011 Gephi Consortium. All rights reserved. The contents of this file are subject to the terms of either the GNU General Public License Version 3 only ("GPL") or the Common Development and Distribution License("CDDL") (collectively, the "License"). You may not use this file except in compliance with the License. You can obtain a copy of the License at http://gephi.org/about/legal/license-notice/ or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the specific language governing permissions and limitations under the License. When distributing the software, include this License Header Notice in each file and include the License files at /cddl-1.0.txt and /gpl-3.0.txt. 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Contributor(s): Portions Copyrighted 2011 Gephi Consortium. */ package org.gephi.statistics.plugin; import java.text.DecimalFormat; import java.text.NumberFormat; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import org.gephi.data.attributes.api.AttributeColumn; import org.gephi.data.attributes.api.AttributeModel; import org.gephi.data.attributes.api.AttributeOrigin; import org.gephi.data.attributes.api.AttributeRow; import org.gephi.data.attributes.api.AttributeTable; import org.gephi.data.attributes.api.AttributeType; import org.gephi.graph.api.DirectedGraph; import org.gephi.graph.api.Edge; import org.gephi.graph.api.GraphModel; import org.gephi.graph.api.HierarchicalDirectedGraph; import org.gephi.graph.api.HierarchicalGraph; import org.gephi.graph.api.Node; import org.gephi.statistics.spi.Statistics; import org.gephi.utils.longtask.spi.LongTask; import org.gephi.utils.progress.Progress; import org.gephi.utils.progress.ProgressTicket; import org.jfree.chart.ChartFactory; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.PlotOrientation; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; /** * * @author Sebastien Heymann */ public class WeightedDegree implements Statistics, LongTask { public static final String WDEGREE = "weighted degree"; public static final String WINDEGREE = "weighted indegree"; public static final String WOUTDEGREE = "weighted outdegree"; private boolean isDirected; // only set inside this class private boolean isCanceled; private ProgressTicket progress; private double avgWDegree; private Map<Double, Integer> degreeDist; private Map<Double, Integer> inDegreeDist; private Map<Double, Integer> outDegreeDist; public double getAverageDegree() { return avgWDegree; } public void execute(GraphModel graphModel, AttributeModel attributeModel) { HierarchicalGraph graph = graphModel.getHierarchicalGraphVisible(); execute(graph, attributeModel); } public void execute(HierarchicalGraph graph, AttributeModel attributeModel) { isDirected = graph instanceof DirectedGraph; isCanceled = false; degreeDist = new HashMap<Double, Integer>(); inDegreeDist = new HashMap<Double, Integer>(); outDegreeDist = new HashMap<Double, Integer>(); AttributeTable nodeTable = attributeModel.getNodeTable(); AttributeColumn degCol = nodeTable.getColumn(WDEGREE); AttributeColumn inCol = nodeTable.getColumn(WINDEGREE); AttributeColumn outCol = nodeTable.getColumn(WOUTDEGREE); if (degCol == null) { degCol = nodeTable.addColumn(WDEGREE, "Weighted Degree", AttributeType.DOUBLE, AttributeOrigin.COMPUTED, 0.0); } if (isDirected) { if (inCol == null) { inCol = nodeTable.addColumn(WINDEGREE, "Weighted In-Degree", AttributeType.DOUBLE, AttributeOrigin.COMPUTED, 0.0); } if (outCol == null) { outCol = nodeTable.addColumn(WOUTDEGREE, "Weighted Out-Degree", AttributeType.DOUBLE, AttributeOrigin.COMPUTED, 0.0); } } graph.readLock(); Progress.start(progress, graph.getNodeCount()); int i = 0; for (Node n : graph.getNodes()) { AttributeRow row = (AttributeRow) n.getNodeData().getAttributes(); double totalWeight = 0; if (isDirected) { HierarchicalDirectedGraph hdg = graph.getGraphModel().getHierarchicalDirectedGraph(); double totalInWeight = 0; double totalOutWeight = 0; for (Iterator it = graph.getEdgesAndMetaEdges(n).iterator(); it.hasNext();) { Edge e = (Edge) it.next(); if (e.getSource().getNodeData().equals(n.getNodeData())) { totalOutWeight += e.getWeight(); } if (e.getTarget().getNodeData().equals(n.getNodeData())) { totalInWeight += e.getWeight(); } } totalWeight = totalInWeight + totalOutWeight; row.setValue(inCol, totalInWeight); row.setValue(outCol, totalOutWeight); if (!inDegreeDist.containsKey(totalInWeight)) { inDegreeDist.put(totalInWeight, 0); } inDegreeDist.put(totalInWeight, inDegreeDist.get(totalInWeight) + 1); if (!outDegreeDist.containsKey(totalOutWeight)) { outDegreeDist.put(totalOutWeight, 0); } outDegreeDist.put(totalOutWeight, outDegreeDist.get(totalOutWeight) + 1); } else { for (Iterator it = graph.getEdgesAndMetaEdges(n).iterator(); it.hasNext();) { Edge e = (Edge) it.next(); totalWeight += e.getWeight(); } } row.setValue(degCol, totalWeight); avgWDegree += totalWeight; if (!degreeDist.containsKey(totalWeight)) { degreeDist.put(totalWeight, 0); } degreeDist.put(totalWeight, degreeDist.get(totalWeight) + 1); if (isCanceled) { break; } i++; Progress.progress(progress, i); } avgWDegree /= (isDirected) ? 2 * graph.getNodeCount() : graph.getNodeCount(); graph.readUnlockAll(); } public String getReport() { String report = ""; if (isDirected) { report = getDirectedReport(); } else { //Distribution series XYSeries dSeries = ChartUtils.createXYSeries(degreeDist, "Degree Distribution"); XYSeriesCollection dataset1 = new XYSeriesCollection(); dataset1.addSeries(dSeries); JFreeChart chart1 = ChartFactory.createXYLineChart("Degree Distribution", "Value", "Count", dataset1, PlotOrientation.VERTICAL, true, false, false); chart1.removeLegend(); ChartUtils.decorateChart(chart1); ChartUtils.scaleChart(chart1, dSeries, false); String degreeImageFile = ChartUtils.renderChart(chart1, "w-degree-distribution.png"); NumberFormat f = new DecimalFormat("#0.000"); report = "<HTML> <BODY> <h1>Weighted Degree Report </h1> " + "<hr>" + "<br> <h2> Results: </h2>" + "Average Weighted Degree: " + f.format(avgWDegree) + "<br /><br />" + degreeImageFile + "</BODY></HTML>"; } return report; } public String getDirectedReport() { //Distribution series XYSeries dSeries = ChartUtils.createXYSeries(degreeDist, "Degree Distribution"); XYSeries idSeries = ChartUtils.createXYSeries(inDegreeDist, "In-Degree Distribution"); XYSeries odSeries = ChartUtils.createXYSeries(outDegreeDist, "Out-Degree Distribution"); XYSeriesCollection dataset1 = new XYSeriesCollection(); dataset1.addSeries(dSeries); XYSeriesCollection dataset2 = new XYSeriesCollection(); dataset2.addSeries(idSeries); XYSeriesCollection dataset3 = new XYSeriesCollection(); dataset3.addSeries(odSeries); JFreeChart chart1 = ChartFactory.createXYLineChart("Degree Distribution", "Value", "Count", dataset1, PlotOrientation.VERTICAL, true, false, false); ChartUtils.decorateChart(chart1); ChartUtils.scaleChart(chart1, dSeries, false); String degreeImageFile = ChartUtils.renderChart(chart1, "w-degree-distribution.png"); JFreeChart chart2 = ChartFactory.createXYLineChart("In-Degree Distribution", "Value", "Count", dataset2, PlotOrientation.VERTICAL, true, false, false); ChartUtils.decorateChart(chart2); ChartUtils.scaleChart(chart2, dSeries, false); String indegreeImageFile = ChartUtils.renderChart(chart2, "indegree-distribution.png"); JFreeChart chart3 = ChartFactory.createXYLineChart("Out-Degree Distribution", "Value", "Count", dataset3, PlotOrientation.VERTICAL, true, false, false); ChartUtils.decorateChart(chart3); ChartUtils.scaleChart(chart3, dSeries, false); String outdegreeImageFile = ChartUtils.renderChart(chart3, "outdegree-distribution.png"); NumberFormat f = new DecimalFormat("#0.000"); String report = "<HTML> <BODY> <h1>Weighted Degree Report </h1> " + "<hr>" + "<br> <h2> Results: </h2>" + "Average Weighted Degree: " + f.format(avgWDegree) + "<br /><br />" + degreeImageFile + "<br /><br />" + indegreeImageFile + "<br /><br />" + outdegreeImageFile + "</BODY></HTML>"; return report; } public boolean cancel() { this.isCanceled = true; return true; } public void setProgressTicket(ProgressTicket progressTicket) { this.progress = progressTicket; } }