org.sonar.server.charts.deprecated.SparkLinesChart.java Source code

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Here is the source code for org.sonar.server.charts.deprecated.SparkLinesChart.java

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/*
 * Sonar, open source software quality management tool.
 * Copyright (C) 2008-2012 SonarSource
 * mailto:contact AT sonarsource DOT com
 *
 * Sonar is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * Sonar is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Sonar; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.server.charts.deprecated;

import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickUnit;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.RectangleInsets;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Map;
import java.util.StringTokenizer;

public class SparkLinesChart extends BaseChartWeb implements DeprecatedChart {

    private XYSeriesCollection dataset = null;
    private DateAxis x = null;
    private NumberAxis y = null;
    private StandardXYItemRenderer renderer = null;

    public SparkLinesChart(Map<String, String> params) {
        super(params);
        jfreechart = new JFreeChart(null, TextTitle.DEFAULT_FONT, new XYPlot(), false);
    }

    @Override
    protected BufferedImage getChartImage() throws IOException {
        configure();
        return getBufferedImage(jfreechart);
    }

    private void configure() {
        configureChart(jfreechart, false);
        configureXAxis();
        configureYAxis();
        configureRenderer();
        configureDataset();
        configurePlot();
        applyParams();
    }

    private void configureRenderer() {
        renderer = new StandardXYItemRenderer(StandardXYItemRenderer.LINES);
    }

    private void configureYAxis() {
        y = new NumberAxis();
        y.setTickLabelsVisible(false);
        y.setTickMarksVisible(false);
        y.setAxisLineVisible(false);
        y.setNegativeArrowVisible(false);
        y.setPositiveArrowVisible(false);
        y.setVisible(false);
    }

    private void configureXAxis() {
        x = new DateAxis();
        x.setTickUnit(new DateTickUnit(DateTickUnit.MONTH, 1));
        x.setTickLabelsVisible(false);
        x.setTickMarksVisible(false);
        x.setAxisLineVisible(false);
        x.setNegativeArrowVisible(false);
        x.setPositiveArrowVisible(false);
        x.setVisible(false);
    }

    private void configureDataset() {
        dataset = new XYSeriesCollection();
    }

    private void configurePlot() {
        XYPlot plot = (XYPlot) jfreechart.getPlot();
        plot.setInsets(RectangleInsets.ZERO_INSETS);
        plot.setDataset(dataset);
        plot.setDomainAxis(x);
        plot.setDomainGridlinesVisible(false);
        plot.setDomainCrosshairVisible(false);
        plot.setRangeGridlinesVisible(false);
        plot.setRangeCrosshairVisible(false);
        plot.setRangeAxis(y);
        plot.setRenderer(renderer);
        plot.setBackgroundAlpha(0.0f);
    }

    private void applyParams() {
        applyCommonParams();

        configureColors(params.get(CHART_PARAM_COLORS), renderer);
        addMeasures(params.get(CHART_PARAM_VALUES));

        // -- Plot
        XYPlot plot = (XYPlot) jfreechart.getPlot();
        plot.setOutlineVisible(isParamValueValid(params.get(CHART_PARAM_OUTLINE_VISIBLE))
                && Boolean.getBoolean(params.get(CHART_PARAM_OUTLINE_VISIBLE)));
    }

    private void addMeasures(String values) {
        double min = Double.MAX_VALUE;
        double max = Double.MIN_VALUE;
        XYSeries series1 = new XYSeries("");
        if (values != null && values.length() > 0) {
            StringTokenizer st = new StringTokenizer(values, ",");
            while (st.hasMoreTokens()) {
                double vX = convertParamToDouble(st.nextToken());
                double vY = 0.0;
                if (st.hasMoreTokens()) {
                    vY = convertParamToDouble(st.nextToken());
                }
                series1.add(vX, vY);

                min = (vY < min ? vY : min);
                max = (vY > max ? vY : max);
            }
            dataset.addSeries(series1);
            y.setRange(min - 1, max + 1);
        }
    }

}