com.xpn.xwiki.plugin.charts.plots.LinePlotFactory.java Source code

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Here is the source code for com.xpn.xwiki.plugin.charts.plots.LinePlotFactory.java

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/*
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This 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 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package com.xpn.xwiki.plugin.charts.plots;

import java.lang.reflect.Constructor;

import org.jfree.chart.plot.Plot;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;

import com.xpn.xwiki.plugin.charts.ChartCustomizer;
import com.xpn.xwiki.plugin.charts.exceptions.DataSourceException;
import com.xpn.xwiki.plugin.charts.exceptions.GenerateException;
import com.xpn.xwiki.plugin.charts.params.ChartParams;
import com.xpn.xwiki.plugin.charts.source.DataSource;

public class LinePlotFactory implements PlotFactory {
    private static LinePlotFactory uniqueInstance = new LinePlotFactory();

    private LinePlotFactory() {
        // empty
    }

    public static LinePlotFactory getInstance() {
        return uniqueInstance;
    }

    public Plot create(DataSource dataSource, ChartParams params) throws GenerateException, DataSourceException {
        Class rendererClass = params.getClass(ChartParams.RENDERER);
        if (rendererClass == null || XYItemRenderer.class.isAssignableFrom(rendererClass)) {
            XYItemRenderer renderer;
            if (rendererClass != null) {
                try {
                    Constructor ctor = rendererClass.getConstructor(new Class[] {});
                    renderer = (XYItemRenderer) ctor.newInstance(new Object[] {});
                } catch (Throwable e) {
                    throw new GenerateException(e);
                }
            } else {
                renderer = new XYLineAndShapeRenderer();
            }
            ChartCustomizer.customizeXYItemRenderer(renderer, params);

            return XYPlotFactory.getInstance().create(dataSource, renderer, params);
        } else if (CategoryItemRenderer.class.isAssignableFrom(rendererClass)) {
            CategoryItemRenderer renderer;
            if (rendererClass != null) {
                try {
                    Constructor ctor = rendererClass.getConstructor(new Class[] {});
                    renderer = (CategoryItemRenderer) ctor.newInstance(new Object[] {});
                } catch (Throwable e) {
                    throw new GenerateException(e);
                }
            } else {
                renderer = new LineAndShapeRenderer();
            }
            ChartCustomizer.customizeCategoryItemRenderer(renderer, params);

            return CategoryPlotFactory.getInstance().create(dataSource, renderer, params);
        } else {
            throw new GenerateException("Incompatible renderer class: " + rendererClass);
        }
    }

    // private boolean hasNumericHeader(DataSource dataSource,
    // ChartParams params) throws DataSourceException {
    // String dataSeries = params.getString(ChartParams.SERIES);
    // try {
    // if (dataSeries.equals("rows") && dataSource.hasHeaderRow()) {
    // for (int column = 0; column<dataSource.getColumnCount(); column++) {
    // Double.parseDouble(dataSource.getHeaderRowValue(column));
    // }
    // return true;
    // } else if (dataSeries.equals("columns") && dataSource.hasHeaderColumn()) {
    // for (int row = 0; row<dataSource.getRowCount(); row++) {
    // Double.parseDouble(dataSource.getHeaderColumnValue(row));
    // }
    // return true;
    // }
    // } catch (NumberFormatException e) { /* ignore */ }
    // return false;
    // }
}