[2033] | 1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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| 2 | // |
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| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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| 4 | // you may not use this file except in compliance with the License. |
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| 5 | // You may obtain a copy of the License at |
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| 6 | // |
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| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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| 8 | // |
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| 9 | // Unless required by applicable law or agreed to in writing, software |
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| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 12 | // See the License for the specific language governing permissions and |
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| 13 | // limitations under the License. |
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| 14 | |
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| 15 | package de.ugoe.cs.autoquest.ui.swt; |
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| 16 | |
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| 17 | import java.awt.BasicStroke; |
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| 18 | import java.awt.Graphics2D; |
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| 19 | import java.awt.geom.Ellipse2D; |
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| 20 | import java.awt.geom.Rectangle2D; |
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| 21 | import java.io.BufferedOutputStream; |
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| 22 | import java.io.FileOutputStream; |
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| 23 | import java.text.DecimalFormat; |
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| 24 | import java.util.HashMap; |
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| 25 | import java.util.HashSet; |
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| 26 | import java.util.LinkedList; |
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| 27 | import java.util.List; |
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| 28 | import java.util.Map; |
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| 29 | import java.util.Set; |
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| 30 | import java.util.TreeMap; |
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| 31 | |
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| 32 | import org.jfree.chart.ChartFactory; |
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| 33 | import org.jfree.chart.JFreeChart; |
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| 34 | import org.jfree.chart.axis.AxisLocation; |
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| 35 | import org.jfree.chart.axis.LogarithmicAxis; |
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| 36 | import org.jfree.chart.axis.NumberAxis; |
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| 37 | import org.jfree.chart.plot.PlotOrientation; |
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| 38 | import org.jfree.chart.plot.ValueMarker; |
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| 39 | import org.jfree.chart.plot.XYPlot; |
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| 40 | import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; |
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| 41 | import org.jfree.chart.title.TextTitle; |
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| 42 | import org.jfree.data.xy.DefaultTableXYDataset; |
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| 43 | import org.jfree.data.xy.XYDataset; |
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| 44 | import org.jfree.data.xy.XYSeries; |
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| 45 | import org.jfree.ui.RectangleAnchor; |
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| 46 | import org.jfree.ui.RectangleInsets; |
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| 47 | |
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| 48 | import com.lowagie.text.Rectangle; |
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| 49 | import com.lowagie.text.pdf.DefaultFontMapper; |
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| 50 | import com.lowagie.text.pdf.PdfContentByte; |
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| 51 | import com.lowagie.text.pdf.PdfTemplate; |
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| 52 | import com.lowagie.text.pdf.PdfWriter; |
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| 53 | |
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| 54 | import de.ugoe.cs.autoquest.tasktrees.treeifc.DefaultTaskInstanceTraversingVisitor; |
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| 55 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTask; |
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| 56 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTaskInstance; |
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| 57 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequence; |
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| 58 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask; |
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| 59 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInfo; |
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| 60 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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| 61 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskModel; |
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| 62 | import de.ugoe.cs.autoquest.tasktrees.treeifc.TaskMetric; |
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| 63 | import de.ugoe.cs.autoquest.tasktrees.treeifc.TaskTreeUtils; |
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| 64 | |
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| 65 | /** |
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| 66 | * <p> |
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| 67 | * TODO comment |
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| 68 | * </p> |
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| 69 | * |
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| 70 | * @author Patrick Harms |
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| 71 | */ |
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| 72 | public class TaskTreePlotUtils { |
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| 73 | |
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| 74 | /** name for visualizing a task count to event coverage plot */ |
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| 75 | public static final String TASK_COUNT__EVENT_COVERAGE_PLOT = "event coverage plot"; |
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| 76 | |
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| 77 | /** name for visualizing the instance counts of tasks ordered by the event coverage */ |
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| 78 | public static final String ORDERED_TASK_COUNT_PLOT = "task instance count - coverage plot"; |
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| 79 | |
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| 80 | /** name for visualizing a cumulative coverage of events by the tasks orded by their event |
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| 81 | * coverage */ |
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| 82 | public static final String CUMULATIVE_TASK_COVERAGE_PLOT = "cumulative task coverage plot"; |
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| 83 | |
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| 84 | /** colors */ |
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| 85 | public static final java.awt.Color[] colors = new java.awt.Color[] { |
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| 86 | java.awt.Color.BLACK, java.awt.Color.GRAY, java.awt.Color.RED, java.awt.Color.CYAN, |
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| 87 | java.awt.Color.ORANGE, java.awt.Color.GREEN, java.awt.Color.MAGENTA, java.awt.Color.BLUE, |
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| 88 | java.awt.Color.PINK, java.awt.Color.DARK_GRAY, java.awt.Color.LIGHT_GRAY, |
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| 89 | java.awt.Color.YELLOW |
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| 90 | }; |
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| 91 | |
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| 92 | /** |
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| 93 | * |
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| 94 | */ |
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| 95 | public static JFreeChart createPlot(String name, |
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| 96 | List<ITaskModel> models, |
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| 97 | List<String> modelNames, |
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| 98 | List<Integer> groups) |
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| 99 | { |
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| 100 | JFreeChart chart = null; |
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| 101 | |
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| 102 | if (TASK_COUNT__EVENT_COVERAGE_PLOT.equals(name)) { |
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| 103 | XYDataset dataset1 = createTaskCountEventCoveragePlotDataSet(models.get(0)); |
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| 104 | |
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| 105 | chart = ChartFactory.createXYLineChart |
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| 106 | (TASK_COUNT__EVENT_COVERAGE_PLOT, "task counts", "event coverage", |
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| 107 | dataset1, PlotOrientation.VERTICAL, models.size() > 1, false, false); |
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| 108 | |
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| 109 | for (int i = 1; i < models.size(); i++) { |
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| 110 | chart.getXYPlot().setDataset |
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| 111 | (i, createTaskCountEventCoveragePlotDataSet(models.get(i))); |
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| 112 | } |
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| 113 | |
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| 114 | XYPlot plot = chart.getXYPlot(); |
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| 115 | NumberAxis domainAxis = new LogarithmicAxis("task counts"); |
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| 116 | NumberAxis rangeAxis = new LogarithmicAxis("event coverage"); |
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| 117 | plot.setDomainAxis(domainAxis); |
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| 118 | plot.setRangeAxis(rangeAxis); |
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| 119 | } |
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| 120 | else if (CUMULATIVE_TASK_COVERAGE_PLOT.equals(name)) { |
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| 121 | Set<ISequence> mostProminent = |
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| 122 | TaskTreeUtils.getMostProminentTasks(models.get(0), models.get(0).getTasks()); |
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| 123 | |
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| 124 | XYDataset dataset = createCumulativeTaskCoveragePlotDataSet(models.get(0), |
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| 125 | modelNames.get(0)); |
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| 126 | chart = ChartFactory.createXYLineChart |
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[2061] | 127 | (CUMULATIVE_TASK_COVERAGE_PLOT, |
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| 128 | "Sequences ordered by coverage in % of sequences", |
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| 129 | "Cumulative action instance coverage in % of all recorded action instances", |
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| 130 | dataset, PlotOrientation.VERTICAL, models.size() > 1, false, false); |
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[2033] | 131 | |
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| 132 | final XYPlot plot = chart.getXYPlot(); |
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| 133 | plot.setBackgroundPaint(java.awt.Color.WHITE); |
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| 134 | plot.setDomainAxisLocation(AxisLocation.BOTTOM_OR_RIGHT); |
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| 135 | |
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| 136 | double mpMarker = (double) 100 * mostProminent.size() / dataset.getItemCount(0); |
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| 137 | ValueMarker marker = new ValueMarker(mpMarker); |
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| 138 | marker.setLabel(new DecimalFormat("#0.0").format(mpMarker)); |
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| 139 | marker.setLabelAnchor(RectangleAnchor.BOTTOM); |
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| 140 | marker.setLabelOffset(new RectangleInsets(0, -12, 10, 15)); |
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| 141 | plot.addDomainMarker(marker); |
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| 142 | |
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| 143 | double xLow = 0; |
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| 144 | double yLow = 0; |
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| 145 | double xHigh = 100; |
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| 146 | double yHigh = 100; |
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| 147 | double maxY = 0; |
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| 148 | for (int i = 0; i < dataset.getItemCount(0); i++) { |
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| 149 | double xValue = dataset.getXValue(0, i); |
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| 150 | double yValue = dataset.getYValue(0, i); |
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| 151 | |
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| 152 | if ((xLow < xValue) && (xValue < mpMarker)) { |
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| 153 | xLow = xValue; |
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| 154 | yLow = yValue; |
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| 155 | } |
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| 156 | else if ((xHigh > xValue) && (xValue > mpMarker)) { |
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| 157 | xHigh = xValue; |
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| 158 | yHigh = yValue; |
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| 159 | } |
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| 160 | |
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| 161 | maxY = Math.max(maxY, yValue); |
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| 162 | } |
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| 163 | |
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| 164 | marker = new ValueMarker((yHigh + yLow) / 2); |
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| 165 | marker.setLabel(new DecimalFormat("#0.0").format((yHigh + yLow) / 2)); |
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| 166 | marker.setLabelOffset(new RectangleInsets(5, 15, 0, 10)); |
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| 167 | plot.addRangeMarker(marker); |
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| 168 | marker = new ValueMarker(maxY); |
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| 169 | marker.setLabel(new DecimalFormat("#0.0").format(maxY)); |
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| 170 | marker.setLabelOffset(new RectangleInsets(5, 15, 0, 10)); |
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| 171 | plot.addRangeMarker(marker); |
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| 172 | |
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| 173 | plot.getRenderer(0).setSeriesPaint(0, colors[0]); |
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| 174 | plot.getRenderer(0).setSeriesStroke(0, new BasicStroke(3.0f, BasicStroke.CAP_ROUND, |
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| 175 | BasicStroke.JOIN_ROUND)); |
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| 176 | |
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| 177 | for (int i = 1; i < models.size(); i++) { |
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| 178 | plot.setDataset(i, createCumulativeTaskCoveragePlotDataSet(models.get(i), |
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| 179 | modelNames.get(i))); |
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| 180 | |
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| 181 | plot.setRenderer(i, new XYLineAndShapeRenderer(true, false)); |
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| 182 | plot.getRenderer(i).setSeriesPaint(0, colors[groups.get(i)]); |
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| 183 | plot.getRenderer(i).setSeriesStroke(0, new BasicStroke(1.0f, BasicStroke.CAP_ROUND, |
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| 184 | BasicStroke.JOIN_ROUND)); |
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| 185 | } |
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| 186 | |
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[2061] | 187 | NumberAxis domainAxis = new NumberAxis |
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| 188 | ("Sequences ordered by coverage in % of sequences"); |
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| 189 | |
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[2033] | 190 | domainAxis.setUpperBound(100); |
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| 191 | plot.setDomainAxis(domainAxis); |
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| 192 | |
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[2061] | 193 | NumberAxis rangeAxis = new NumberAxis |
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| 194 | ("Cumulative action instance coverage in % of all recorded action instances"); |
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| 195 | |
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[2033] | 196 | rangeAxis.setUpperBound(100); |
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| 197 | plot.setRangeAxis(rangeAxis); |
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| 198 | } |
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| 199 | else if (ORDERED_TASK_COUNT_PLOT.equals(name)) { |
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| 200 | XYDataset dataset = createOrderedTaskCountPlotDataSet(models.get(0), modelNames.get(0)); |
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| 201 | |
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| 202 | chart = ChartFactory.createXYLineChart |
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| 203 | (ORDERED_TASK_COUNT_PLOT, "tasks ordered by coverage", |
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| 204 | "number of instances", dataset, PlotOrientation.VERTICAL, models.size() > 1, |
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| 205 | false, false); |
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| 206 | |
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| 207 | final XYPlot plot = chart.getXYPlot(); |
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| 208 | plot.setBackgroundPaint(java.awt.Color.WHITE); |
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| 209 | plot.setDomainAxisLocation(AxisLocation.BOTTOM_OR_RIGHT); |
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| 210 | |
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| 211 | XYLineAndShapeRenderer scatterRenderer = new XYLineAndShapeRenderer(false, true); |
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| 212 | scatterRenderer.setSeriesShapesFilled(0, false); |
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| 213 | scatterRenderer.setSeriesShape(0, new Ellipse2D.Float(-3.0f, -3.0f, 6.0f, 6.0f)); |
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| 214 | scatterRenderer.setSeriesPaint(0, colors[0]); |
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| 215 | plot.setRenderer(0, scatterRenderer); |
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| 216 | |
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| 217 | for (int i = 1; i < models.size(); i++) { |
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| 218 | chart.getXYPlot().setDataset |
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| 219 | (i, createOrderedTaskCountPlotDataSet(models.get(i), modelNames.get(i))); |
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| 220 | |
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| 221 | scatterRenderer = new XYLineAndShapeRenderer(false, true); |
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| 222 | scatterRenderer.setSeriesShapesFilled(0, false); |
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| 223 | scatterRenderer.setSeriesShape(0, new Ellipse2D.Float(-3.0f, -3.0f, 6.0f, 6.0f)); |
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| 224 | scatterRenderer.setSeriesPaint(0, colors[i]); |
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| 225 | plot.setRenderer(i, scatterRenderer); |
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| 226 | } |
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| 227 | |
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| 228 | NumberAxis domainAxis = new NumberAxis("sequences ordered by coverage"); |
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| 229 | domainAxis.setUpperBound(100); |
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| 230 | plot.setDomainAxis(domainAxis); |
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| 231 | |
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| 232 | NumberAxis rangeAxis = new LogarithmicAxis("number of instances"); |
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| 233 | plot.setRangeAxis(rangeAxis); |
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| 234 | } |
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| 235 | |
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| 236 | return chart; |
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| 237 | } |
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| 238 | |
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| 239 | /** |
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| 240 | * |
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| 241 | */ |
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| 242 | public static void saveChartToPDF(JFreeChart chart, String fileName, int width, int height) |
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| 243 | throws Exception |
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| 244 | { |
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| 245 | if (chart != null) { |
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| 246 | BufferedOutputStream out = null; |
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| 247 | try { |
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| 248 | out = new BufferedOutputStream(new FileOutputStream(fileName)); |
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| 249 | |
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| 250 | //convert chart to PDF with iText: |
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| 251 | Rectangle pagesize = new Rectangle(width, height); |
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| 252 | com.lowagie.text.Document document = |
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| 253 | new com.lowagie.text.Document(pagesize, 50, 50, 50, 50); |
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| 254 | |
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| 255 | try { |
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| 256 | PdfWriter writer = PdfWriter.getInstance(document, out); |
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| 257 | document.addAuthor("JFreeChart"); |
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| 258 | document.open(); |
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| 259 | |
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| 260 | PdfContentByte cb = writer.getDirectContent(); |
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| 261 | PdfTemplate tp = cb.createTemplate(width, height); |
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| 262 | Graphics2D g2 = tp.createGraphics(width, height, new DefaultFontMapper()); |
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| 263 | |
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| 264 | Rectangle2D r2D = new Rectangle2D.Double(0, 0, width, height); |
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| 265 | TextTitle title = chart.getTitle(); |
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| 266 | chart.setTitle((TextTitle) null); |
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| 267 | chart.draw(g2, r2D, null); |
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| 268 | chart.setTitle(title); |
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| 269 | g2.dispose(); |
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| 270 | cb.addTemplate(tp, 0, 0); |
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| 271 | } |
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| 272 | finally { |
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| 273 | document.close(); |
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| 274 | } |
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| 275 | } |
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| 276 | finally { |
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| 277 | if (out != null) { |
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| 278 | out.close(); |
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| 279 | } |
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| 280 | } |
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| 281 | } |
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| 282 | } |
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| 283 | |
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| 284 | /** |
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| 285 | * |
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| 286 | */ |
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| 287 | private static XYDataset createTaskCountEventCoveragePlotDataSet(ITaskModel taskModel) { |
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| 288 | // tree maps required to have sorted maps |
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| 289 | TreeMap<Integer, Integer> minValues = new TreeMap<>(); |
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| 290 | TreeMap<Integer, List<Integer>> allValues = new TreeMap<>(); |
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| 291 | TreeMap<Integer, Integer> maxValues = new TreeMap<>(); |
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| 292 | |
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| 293 | for (ITask task : taskModel.getTasks()) { |
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| 294 | if (task instanceof ISequence) { |
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| 295 | ITaskInfo info = taskModel.getTaskInfo(task); |
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| 296 | int count = task.getInstances().size(); |
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| 297 | int eventCoverage = info.getMeasureValue(TaskMetric.EVENT_COVERAGE); |
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| 298 | |
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| 299 | Integer minValue = minValues.get(count); |
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| 300 | |
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| 301 | if ((minValue == null) || (minValue > eventCoverage)) { |
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| 302 | minValues.put(count, eventCoverage); |
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| 303 | } |
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| 304 | |
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| 305 | Integer maxValue = maxValues.get(count); |
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| 306 | |
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| 307 | if ((maxValue == null) || (maxValue < eventCoverage)) { |
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| 308 | maxValues.put(count, eventCoverage); |
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| 309 | } |
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| 310 | |
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| 311 | List<Integer> values = allValues.get(count); |
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| 312 | |
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| 313 | if (values == null) { |
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| 314 | values = new LinkedList<Integer>(); |
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| 315 | allValues.put(count, values); |
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| 316 | } |
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| 317 | |
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| 318 | values.add(eventCoverage); |
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| 319 | } |
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| 320 | } |
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| 321 | |
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| 322 | DefaultTableXYDataset dataset = new DefaultTableXYDataset(); |
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| 323 | XYSeries minSeries = new XYSeries("min values", true, false); |
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| 324 | XYSeries avgSeries = new XYSeries("avg values", true, false); |
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| 325 | XYSeries maxSeries = new XYSeries("max values", true, false); |
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| 326 | |
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| 327 | // entries are correctly sorted due to the map |
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| 328 | for (Map.Entry<Integer, List<Integer>> entry : allValues.entrySet()) { |
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| 329 | int count = entry.getKey(); |
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| 330 | |
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| 331 | minSeries.add(count, minValues.get(count)); |
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| 332 | maxSeries.add(count, maxValues.get(count)); |
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| 333 | |
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| 334 | avgSeries.add(count, getAverage(entry.getValue())); |
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| 335 | } |
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| 336 | |
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| 337 | dataset.addSeries(minSeries); |
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| 338 | dataset.addSeries(avgSeries); |
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| 339 | dataset.addSeries(maxSeries); |
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| 340 | return dataset; |
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| 341 | } |
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| 342 | |
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| 343 | /** |
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| 344 | * |
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| 345 | */ |
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| 346 | private static XYDataset createCumulativeTaskCoveragePlotDataSet(ITaskModel taskModel, |
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| 347 | String taskModelName) |
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| 348 | { |
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| 349 | Map<Integer, List<ISequence>> coverageCounts = new HashMap<>(); |
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| 350 | Map<ISequence, Set<IEventTaskInstance>> coverages = new HashMap<>(); |
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| 351 | Set<IEventTaskInstance> allEvents = new HashSet<>(); |
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| 352 | int maxCoverage = 0; |
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| 353 | |
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| 354 | for (ITask task : taskModel.getTasks()) { |
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| 355 | if (task instanceof ISequence) { |
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| 356 | final Set<IEventTaskInstance> coveredEvents = new HashSet<>(); |
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| 357 | |
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| 358 | for (ITaskInstance instance : task.getInstances()) { |
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| 359 | instance.accept(new DefaultTaskInstanceTraversingVisitor() { |
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| 360 | @Override |
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| 361 | public void visit(IEventTaskInstance eventTaskInstance) { |
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| 362 | coveredEvents.add(eventTaskInstance); |
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| 363 | } |
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| 364 | }); |
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| 365 | } |
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| 366 | |
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| 367 | coverages.put((ISequence) task, coveredEvents); |
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| 368 | |
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| 369 | List<ISequence> tasksWithSameCoverage = coverageCounts.get(coveredEvents.size()); |
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| 370 | |
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| 371 | if (tasksWithSameCoverage == null) { |
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| 372 | tasksWithSameCoverage = new LinkedList<>(); |
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| 373 | coverageCounts.put(coveredEvents.size(), tasksWithSameCoverage); |
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| 374 | } |
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| 375 | |
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| 376 | tasksWithSameCoverage.add((ISequence) task); |
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| 377 | |
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| 378 | maxCoverage = Math.max(maxCoverage, coveredEvents.size()); |
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| 379 | } |
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| 380 | else if (task instanceof IEventTask) { |
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| 381 | for (ITaskInstance instance : task.getInstances()) { |
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| 382 | allEvents.add((IEventTaskInstance) instance); |
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| 383 | } |
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| 384 | } |
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| 385 | } |
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| 386 | |
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| 387 | XYSeries cumulativeSeries = new XYSeries(taskModelName, true, false); |
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| 388 | Set<IEventTaskInstance> cumulativeCoverage = new HashSet<>(); |
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| 389 | |
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| 390 | // entries are correctly sorted due to the map |
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| 391 | int sequenceIndex = 1; |
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| 392 | |
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| 393 | for (int i = maxCoverage; i > 0; i--) { |
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| 394 | List<ISequence> sequencesWithSameCoverage = coverageCounts.get(i); |
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| 395 | |
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| 396 | if (sequencesWithSameCoverage == null) { |
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| 397 | continue; |
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| 398 | } |
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| 399 | |
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| 400 | for (ISequence sequence : sequencesWithSameCoverage) { |
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| 401 | cumulativeCoverage.addAll(coverages.get(sequence)); |
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| 402 | double xvalue = (double) 100 * sequenceIndex / coverages.size(); |
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| 403 | double yvalue = (double) 100 * cumulativeCoverage.size() / allEvents.size(); |
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| 404 | cumulativeSeries.add(xvalue, yvalue); |
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| 405 | sequenceIndex++; |
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| 406 | } |
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| 407 | } |
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| 408 | |
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| 409 | DefaultTableXYDataset dataset = new DefaultTableXYDataset(); |
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| 410 | dataset.addSeries(cumulativeSeries); |
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| 411 | return dataset; |
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| 412 | } |
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| 413 | |
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| 414 | /** |
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| 415 | * |
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| 416 | */ |
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| 417 | private static XYDataset createOrderedTaskCountPlotDataSet(ITaskModel taskModel, |
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| 418 | String taskModelName) |
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| 419 | { |
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| 420 | Map<Integer, List<ISequence>> coverageCounts = new HashMap<>(); |
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| 421 | Map<ISequence, Set<IEventTaskInstance>> coverages = new HashMap<>(); |
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| 422 | int maxCoverage = 0; |
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| 423 | |
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| 424 | for (ITask task : taskModel.getTasks()) { |
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| 425 | if (task instanceof ISequence) { |
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| 426 | final Set<IEventTaskInstance> coveredEvents = new HashSet<>(); |
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| 427 | |
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| 428 | for (ITaskInstance instance : task.getInstances()) { |
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| 429 | instance.accept(new DefaultTaskInstanceTraversingVisitor() { |
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| 430 | @Override |
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| 431 | public void visit(IEventTaskInstance eventTaskInstance) { |
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| 432 | coveredEvents.add(eventTaskInstance); |
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| 433 | } |
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| 434 | }); |
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| 435 | } |
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| 436 | |
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| 437 | coverages.put((ISequence) task, coveredEvents); |
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| 438 | |
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| 439 | List<ISequence> tasksWithSameCoverage = coverageCounts.get(coveredEvents.size()); |
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| 440 | |
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| 441 | if (tasksWithSameCoverage == null) { |
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| 442 | tasksWithSameCoverage = new LinkedList<>(); |
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| 443 | coverageCounts.put(coveredEvents.size(), tasksWithSameCoverage); |
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| 444 | } |
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| 445 | |
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| 446 | tasksWithSameCoverage.add((ISequence) task); |
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| 447 | |
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| 448 | maxCoverage = Math.max(maxCoverage, coveredEvents.size()); |
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| 449 | } |
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| 450 | } |
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| 451 | |
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| 452 | XYSeries counts = new XYSeries(taskModelName, true, false); |
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| 453 | |
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| 454 | // entries are correctly sorted due to the map |
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| 455 | int sequenceIndex = 1; |
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| 456 | |
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| 457 | for (int i = maxCoverage; i > 0; i--) { |
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| 458 | List<ISequence> sequencesWithSameCoverage = coverageCounts.get(i); |
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| 459 | |
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| 460 | if (sequencesWithSameCoverage == null) { |
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| 461 | continue; |
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| 462 | } |
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| 463 | |
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| 464 | for (ISequence sequence : sequencesWithSameCoverage) { |
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| 465 | double xvalue = (double) 100 * sequenceIndex / coverages.size(); |
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| 466 | counts.add(xvalue, sequence.getInstances().size()); |
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| 467 | sequenceIndex++; |
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| 468 | } |
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| 469 | } |
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| 470 | |
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| 471 | DefaultTableXYDataset dataset = new DefaultTableXYDataset(); |
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| 472 | dataset.addSeries(counts); |
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| 473 | return dataset; |
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| 474 | } |
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| 475 | |
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| 476 | |
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| 477 | /** |
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| 478 | * |
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| 479 | */ |
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| 480 | private static double getAverage(List<Integer> values) { |
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| 481 | int all = 0; |
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| 482 | |
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| 483 | for (Integer value : values) { |
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| 484 | all += value; |
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| 485 | } |
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| 486 | |
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| 487 | return ((double) all) / values.size(); |
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| 488 | } |
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| 489 | } |
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