uk.co.bssd.reporting.chart.TimeSeriesChart.java Source code

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Here is the source code for uk.co.bssd.reporting.chart.TimeSeriesChart.java

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/*
 * Copyright 2002-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package uk.co.bssd.reporting.chart;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;

import uk.co.bssd.reporting.dataset.TimedDatapoint;
import uk.co.bssd.reporting.dataset.TimedDatapoints;

public class TimeSeriesChart<T extends Number> implements Chart {

    private final XYDataset dataset;
    private final JFreeChart chart;

    public TimeSeriesChart(TimeSeriesChartDescriptor descriptor, TimedDatapoints<T> timedDatapoints) {
        this.dataset = convertDataset(descriptor.seriesName(), timedDatapoints);
        this.chart = ChartFactory.createTimeSeriesChart(descriptor.title(), descriptor.xAxisLabel(),
                descriptor.yAxisLabel(), this.dataset, descriptor.legend(), false, false);
    }

    @Override
    public void write(ChartWriter writer) {
        writer.write(this.chart);
    }

    private XYDataset convertDataset(String seriesName, TimedDatapoints<T> timedDatapoints) {
        TimeSeries series = new TimeSeries(seriesName);
        for (TimedDatapoint<T> timedDatapoint : timedDatapoints) {
            Millisecond regularTimePeriod = new Millisecond(timedDatapoint.timestamp().toDate());
            series.add(regularTimePeriod, timedDatapoint.value());
        }
        return new TimeSeriesCollection(series);
    }
}