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    • de.tsl2.nano.incubation.graph.SVGChart Maven / Gradle / Ivy

    package de.tsl2.nano.incubation.graph;

import java.io.BufferedInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;

import org.knowm.xchart.ChartBuilder_Category;
import org.knowm.xchart.ChartBuilder_Pie;
import org.knowm.xchart.ChartBuilder_XY;
import org.knowm.xchart.Chart_Category;
import org.knowm.xchart.Chart_Pie;
import org.knowm.xchart.Chart_XY;
import org.knowm.xchart.Series_XY.ChartXYSeriesRenderStyle;
import org.knowm.xchart.VectorGraphicsEncoder;
import org.knowm.xchart.VectorGraphicsEncoder.VectorGraphicsFormat;
import org.knowm.xchart.internal.ChartBuilder;
import org.knowm.xchart.internal.chartpart.Chart;
import org.knowm.xchart.internal.style.Styler.ChartTheme;
import org.knowm.xchart.internal.style.markers.SeriesMarkers;

import de.tsl2.nano.core.ENV;
import de.tsl2.nano.core.ManagedException;
import de.tsl2.nano.core.util.FileUtil;
import de.tsl2.nano.core.util.Util;
import de.tsl2.nano.scanner.FieldReader;

/**
 * creates simple charts and saves them to at least SVG files. this class has indirect dependencies to java.awt! so it
 * is not usable on android dalvik. while there exist some libraries like jfreechart, jfreesvg, gral, ... we decided to
 * use the small xchart library with dependency to VectorGraphics2D.
 * 
    
 * the author of gral shows an overview of java plotters here: http://trac.erichseifert.de/gral/wiki/Comparison.
    
 * in wikipedia you get an overview of graph libraries here:
 * https://en.wikipedia.org/wiki/Wikipedia:How_to_create_charts_for_Wikipedia_articles
 * 
 * @author Tom, Thomas Schneider
 * @version $Revision$
 */
public class SVGChart {
    public enum Type {
        XY, BAR, PIE, SCATTER;
    }

    /**
     * uses xgraph to create a simple XY graph persisting it to an svg file.
     * 
     * @throws IOException
     * @throws FileNotFoundException
     */
    public static  void createGraph(String title,
            String xTitle,
            String yTitle,
            int width,
            int height,
            N... yData) {
        Chart chart =
            createChart(Type.XY, title, xTitle, yTitle, width, height, false, null, serie("y(x)", Arrays.asList(yData)));
        String file = ENV.getTempPath() + FileUtil.getValidFileName(title);
        exportGraph(file, chart);
    }

    /**
     * exportGraph
     * 
     * @param title
     * @param chart
     */
    public static void exportGraph(String file, Chart chart) {
        try {
//            BitmapEncoder.saveBitmap(chart, file, BitmapFormat.PNG);
//            BitmapEncoder.saveBitmap(chart, file, BitmapFormat.JPG);
//            BitmapEncoder.saveJPGWithQuality(chart, file + "_With_Quality.jpg", 0.95f);
//            BitmapEncoder.saveBitmap(chart, file, BitmapFormat.BMP);
//            BitmapEncoder.saveBitmap(chart, file, BitmapFormat.GIF);
//
//            BitmapEncoder.saveBitmapWithDPI(chart, file + "_300_DPI", BitmapFormat.PNG, 300);
//            BitmapEncoder.saveBitmapWithDPI(chart, file + "_300_DPI", BitmapFormat.JPG, 300);
//            BitmapEncoder.saveBitmapWithDPI(chart, file + "_300_DPI", BitmapFormat.GIF, 300);
//
//            VectorGraphicsEncoder.saveVectorGraphic(chart, file, VectorGraphicsFormat.EPS);
//            VectorGraphicsEncoder.saveVectorGraphic(chart, file, VectorGraphicsFormat.PDF);
            VectorGraphicsEncoder.saveVectorGraphic(chart, file, VectorGraphicsFormat.SVG);
        } catch (Exception e) {
            ManagedException.forward(e);
        }
    }

    public static String createGraph(String title,
            String xTitle,
            String yTitle,
            int width,
            int height,
            List x,
            Serie... yn) {
        return createGraph(Type.BAR, title, xTitle, yTitle, width, height, false, x, yn);
    }
    
    public static String createGraph(Type type, String title,
            String xTitle,
            String yTitle,
            int width,
            int height,
            boolean yLogarithmic,
            List x,
            Serie... yn) {
        Chart chart = createChart(type, title, xTitle, yTitle, width, height, yLogarithmic, x, yn);
        String file = ENV.getTempPath() + FileUtil.getValidFileName(title);
        exportGraph(file, chart);
        return file;
    }

    public static Chart createChart(Type type, String title,
            String xTitle,
            String yTitle,
            int width,
            int height,
            boolean yLogarithmic,
            List x,
            Serie... yn) {

        // Create Chart
        ChartBuilder builder;
        switch (type) {
        case BAR:
            builder = new ChartBuilder_Category().xAxisTitle(xTitle).yAxisTitle(yTitle);
            break;
        case XY:
        case SCATTER:
            builder = new ChartBuilder_XY().xAxisTitle(xTitle).yAxisTitle(yTitle);
            break;
        case PIE:
            builder = new ChartBuilder_Pie();
            break;
        default:
            throw new IllegalArgumentException();
        }
        Chart chart = builder.width(width).height(height).theme(ChartTheme.GGPlot2).title(title).build();

        // Customize Chart
//        series.setMarker(SeriesMarkers.CIRCLE);
//      chart.getStyler().setPlotGridLinesVisible(false);
//        chart.getStyler().setXAxisTickMarkSpacingHint(100);

        if (type == Type.SCATTER)
            ((Chart_XY) chart).getStyler().setDefaultSeriesRenderStyle(ChartXYSeriesRenderStyle.Scatter);

        // Series
        if (chart instanceof Chart_Category) {
            Chart_Category c = (Chart_Category) chart;
            for (Serie s : yn) {
                c.addSeries(s.title, x, s.data);
            }
        } else if (chart instanceof Chart_XY) {
            Chart_XY c = (Chart_XY) chart;
            for (Serie s : yn) {
                c.addSeries(s.title, x, s.data);
            }
        } else if (chart instanceof Chart_Pie) {
            Chart_Pie c = (Chart_Pie) chart;
            for (int i = 0; i < yn[0].data.size(); i++) {
                c.addSeries(x.get(i).toString(), yn[0].data.get(i));
            }
        }
        return chart;
    }

    public static void createGraph(String plotFile) {
        Chart chart = createChart(FileUtil.getFile(plotFile));
        String file = ENV.getTempPath() + plotFile;
        exportGraph(file, chart);
    }
    
    /**
     * delegates to {@link #createChart(InputStream)}
     */
    public static Chart createChart(String plotFile) {
        return createChart(FileUtil.getFile(plotFile));
    }
    /**
     * creates Chart from stream/file
     * @param stream stream
     * @return filled chart
     */
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static Chart createChart(InputStream stream) {
        //to do a reset, pack it into a bufferedinputstream
        stream = new BufferedInputStream(stream);
        stream.mark(1024);
        Properties properties = FieldReader.read(stream, false);
        try {
            stream.reset();
        } catch (IOException e) {
            ManagedException.forward(e);
        }
        Map data = FieldReader.readTable(stream, FieldReader.DEL_CSV, Locale.US, false, true, false, float[].class);
        //TODO: chart properties auslesen
        List header = data.get(FieldReader.HEADER);
        Type type = Type.valueOf(properties.getProperty("type", "BAR"));
        String title = properties.getProperty("title", "Graph");
        String xTitle = properties.getProperty("xTitle", "X");
        String yTitle = properties.getProperty("yTitle", "Y");
        int width = Util.get(properties, "width", 640);
        int height = Util.get(properties, "height", 480);
        boolean yLogarithmic = Boolean.valueOf(properties.getProperty("yLogarithmic", "false"));
        Iterator it = data.keySet().iterator();
        Object key;
        key = it.next();
        if (key == FieldReader.HEADER) {
            it.remove();
            key = it.next();
        }
        List x = data.get(key);
        Serie yn[] = new Serie[data.values().size() - 1];
        int i = 0;
        while (it.hasNext()) {
            key = it.next();
            yn[i++] = serie((String) key, data.get(key));
        }
        return createChart(type, title, xTitle, yTitle, width, height, yLogarithmic, x, yn);
    }
    
    /**
     * creates series like {@link #serie(String, List)} for titles and yx lists.
     * 
    
     * WARNING: the first title will be ignored as it should be the x title!
     * 
     * @param titles series title
     * @param yx one or more data series
     * @return packed series
     */
    public static final Serie[] series(List titles, List[] yx) {
        Serie yn[] = new Serie[yx.length];
        for (int i = 0; i < yx.length; i++) {
            yn[i] = new Serie(titles.get(i + 1), yx[i]);
        }
        return yn;
    }

    public static final Serie serie(String title, List data) {
        return new Serie(title, data, null);
    }

    public static final Serie serie(String title, List data, SeriesMarkers marker) {
        return new Serie(title, data, marker);
    }

}

class Serie {
    String title;
    List data;
    SeriesMarkers marker;

    public Serie(String title, List data) {
        this(title, data, null);
    }

    public Serie(String title, List data, SeriesMarkers marker) {
        super();
        this.title = title;
        this.data = data;
        this.marker = marker;
    }

}
    
    
    
    

    




    
    
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