/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2009 Jaspersoft Corporation. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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.
*
* JasperReports 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 JasperReports. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.jasperreports.engine.data;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.jasperreports.engine.JRField;
import net.sf.jasperreports.engine.JRRewindableDataSource;
import net.sf.jasperreports.engine.JRRuntimeException;
/**
* @author Teodor Danciu (teodord@users.sourceforge.net)
* @version $Id: JRBeanCollectionDataSource.java 3939 2010-08-20 09:52:00Z teodord $
*/
public class ListOfArrayDataSource implements JRRewindableDataSource
{
/**
*
*/
private List records = new ArrayList();
private Iterator iterator;
private Object[] currentRecord;
private Map columnNamesMap = new HashMap();
/**
*
*/
public ListOfArrayDataSource(List records, String[] columnNames)
{
this.records = records;
if (columnNames != null)
{
for(int i = 0; i < columnNames.length; i++)
{
columnNamesMap.put(columnNames[i], Integer.valueOf(i));
}
}
iterator = records.iterator();
}
/**
*
*/
public boolean next()
{
boolean hasNext = false;
if (iterator != null)
{
hasNext = iterator.hasNext();
if (hasNext)
{
currentRecord = (Object[])iterator.next();
}
}
return hasNext;
}
/**
*
*/
public Object getFieldValue(JRField jrField)
{
Integer fieldIndex = (Integer)columnNamesMap.get(jrField.getName());
if (fieldIndex == null)
{
throw new JRRuntimeException("Field \"" + jrField.getName() + "\" not found in data source.");
}
return currentRecord[fieldIndex.intValue()];
}
/**
*
*/
public void moveFirst()
{
iterator = records.iterator();
}
}