/*
* 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 org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.Dataset;
import org.pentaho.reporting.engine.classic.core.DataRow;
import org.pentaho.reporting.engine.classic.core.function.Expression;
/**
* Todo: Document me!
* <p/>
* Date: 11.06.2009
* Time: 17:43:06
*
* @author Thomas Morgner.
*/
public class PivotCategorySetCollector extends AbstractCollectorFunction
{
private ArrayList valueColumns;
private String categoryColumn;
public PivotCategorySetCollector()
{
valueColumns = new ArrayList();
}
public String getCategoryColumn()
{
return categoryColumn;
}
public void setCategoryColumn(final String categoryColumn)
{
this.categoryColumn = categoryColumn;
}
public void setValueColumn(final int index, final String field)
{
if (valueColumns.size() == index)
{
valueColumns.add(field);
}
else
{
valueColumns.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));
}
protected Dataset createNewDataset()
{
return new DefaultCategoryDataset();
}
protected void buildDataset()
{
final DataRow dataRow = getDataRow();
final Object categoryObject = dataRow.get(getCategoryColumn());
if (categoryObject instanceof Comparable == false)
{
return;
}
final Comparable categoryComparable = (Comparable) categoryObject;
// I love to be paranoid!
final DefaultCategoryDataset categoryDataset = (DefaultCategoryDataset) getDataSet();
final int maxIndex = this.valueColumns.size();
for (int i = 0; i < maxIndex; i++)
{
final Comparable seriesName = querySeriesValue(i);
final Object valueObject = dataRow.get(getValueColumn(i));
final Number value = (valueObject instanceof Number) ? (Number) valueObject : null;
final Number existingValue = CollectorFunctionUtil.queryExistingValueFromDataSet(categoryDataset, categoryComparable, seriesName);
if (existingValue != null)
{
if (value != null)
{
categoryDataset.setValue(CollectorFunctionUtil.add(existingValue, value), categoryComparable, seriesName);
}
}
else
{
categoryDataset.setValue(value, categoryComparable, seriesName);
}
}
}
/**
* 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 PivotCategorySetCollector expression = (PivotCategorySetCollector) super.getInstance();
expression.valueColumns = (ArrayList) valueColumns.clone();
return expression;
}
}