/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2009 Pentaho Corporation. All rights reserved.
*/
package org.pentaho.plugin.jfreereport.reportcharts.collectors;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.TimeZone;
import org.jfree.data.general.Dataset;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.time.TimeSeriesDataItem;
import org.jfree.data.time.Day;
import org.jfree.data.xy.XYSeries;
import org.pentaho.reporting.engine.classic.core.event.ReportEvent;
import org.pentaho.reporting.engine.classic.core.function.Expression;
/**
* The number of entries in the series, value, and timeValueColumns properties must be the same. The function
* will collect from tuples of {series, value (y), timeValue (x)}.
*
* @author Thomas Morgner.
*/
public class TimeSeriesCollector extends AbstractCollectorFunction
{
/**
* @noinspection EqualsAndHashcode
*/
private static class FastTimeSeriesCollection extends TimeSeriesCollection
{
private static final long serialVersionUID = 2096209400748561882L;
/**
* Superclass hashcode is WAY slow.
*
* @see TimeSeriesCollection#hashCode()
*/
public int hashCode()
{
return this.getSeriesCount();
}
}
private Class timePeriod;
private ArrayList valueColumns;
private ArrayList timeValueColumns;
private HashMap seriesMap;
public TimeSeriesCollector()
{
this.valueColumns = new ArrayList();
this.timeValueColumns = new ArrayList();
this.timePeriod = Day.class;
}
protected Dataset createNewDataset()
{
seriesMap = new HashMap();
return new FastTimeSeriesCollection();
}
public Class getTimePeriod()
{
return timePeriod;
}
public void setTimePeriod(final Class timePeriod)
{
this.timePeriod = timePeriod;
}
public void setValueColumn(final int index, final String field)
{
if (valueColumns.size() == index)
{
valueColumns.add(field);
}
else
{
valueColumns.set(index, field);
}
}
public void setTimeValueColumn(final int index, final String field)
{
if (timeValueColumns.size() == index)
{
timeValueColumns.add(field);
}
else
{
timeValueColumns.set(index, field);
}
}
public String getValueColumn(final int index)
{
return (String) valueColumns.get(index);
}
public int getValueColumnCount()
{
return valueColumns.size();
}
public String[] getValueColumn()
{
return (String[]) valueColumns.toArray(new String[valueColumns.size()]);
}
public void setValueColumn(final String[] fields)
{
this.valueColumns.clear();
this.valueColumns.addAll(Arrays.asList(fields));
}
public String getTimeValueColumn(final int index)
{
return (String) timeValueColumns.get(index);
}
public int getTimeValueColumnCount()
{
return timeValueColumns.size();
}
public String[] getTimeValueColumn()
{
return (String[]) timeValueColumns.toArray(new String[timeValueColumns.size()]);
}
public void setTimeValueColumn(final String[] fields)
{
this.timeValueColumns.clear();
this.timeValueColumns.addAll(Arrays.asList(fields));
}
protected void buildDataset()
{
final Object o = getDataSet();
if (o instanceof TimeSeriesCollection == false)
{
return;
}
final TimeSeriesCollection timeSeriesDataset = (TimeSeriesCollection) o;
final List seriesList = timeSeriesDataset.getSeries();
if (seriesMap == null)
{
final HashMap seriesMap = new HashMap();
for (int i = 0; i < seriesList.size(); i++)
{
final XYSeries series = (XYSeries) seriesList.get(i);
seriesMap.put(series.getKey(), series);
}
this.seriesMap = seriesMap;
}
final int maxIndex = this.valueColumns.size();
for (int i = 0; i < maxIndex; i++)
{
final Comparable seriesName = querySeriesValue(i);
final Object valueObject = getDataRow().get((String) valueColumns.get(i));
final Object timeValueObject = getDataRow().get((String) timeValueColumns.get(i));
final Number value = (valueObject instanceof Number) ? (Number) valueObject : null;
final Date timeValue = convertToDate(timeValueObject);
if (timeValue == null)
{
continue;
}
TimeSeries series = (TimeSeries) seriesMap.get(seriesName);
if (series == null)
{
series = new TimeSeries(seriesName, getTimePeriod());
timeSeriesDataset.addSeries(series);
seriesMap.put(seriesName, series);
}
final RegularTimePeriod regularTimePeriod =
RegularTimePeriod.createInstance(getTimePeriod(), timeValue, TimeZone.getDefault());
final TimeSeriesDataItem timeSeriesDataItem = new TimeSeriesDataItem(regularTimePeriod, value);
series.add(timeSeriesDataItem);
}
}
private Date convertToDate(final Object value)
{
if (value instanceof Date)
{
return (Date) value;
}
if (value instanceof Number)
{
final Number n = (Number) value;
return new Date(n.longValue());
}
return null;
}
/**
* Receives notification that report generation has completed, the report footer was printed, no more output is done.
* This is a helper event to shut down the output service.
*
* @param event The event.
*/
public void reportDone(final ReportEvent event)
{
seriesMap = null;
}
/**
* Return a completly separated copy of this function. The copy does no longer share any changeable objects with the
* original function.
*
* @return a copy of this function.
*/
public Expression getInstance()
{
final TimeSeriesCollector expression = (TimeSeriesCollector) super.getInstance();
expression.valueColumns = (ArrayList) valueColumns.clone();
expression.timeValueColumns = (ArrayList) timeValueColumns.clone();
expression.seriesMap = null;
return expression;
}
}