net.sf.jasperreports.engine.data.JRMapArrayDataSource Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jasperreports Show documentation
Show all versions of jasperreports Show documentation
Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. 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 .
*/
package net.sf.jasperreports.engine.data;
import java.util.Map;
import net.sf.jasperreports.engine.JRField;
import net.sf.jasperreports.engine.JRRewindableDataSource;
/**
* @author Teodor Danciu ([email protected])
*/
public class JRMapArrayDataSource implements JRRewindableDataSource
{
/**
*
*/
private Object[] records;
private int index = -1;
/**
*
*/
public JRMapArrayDataSource(Object[] array)
{
records = array;
}
@Override
public boolean next()
{
index++;
if (records != null)
{
return (index < records.length);
}
return false;
}
@Override
public Object getFieldValue(JRField field)
{
Object value = null;
Map currentRecord = (Map)records[index];
if (currentRecord != null)
{
value = currentRecord.get(field.getName());
}
return value;
}
@Override
public void moveFirst()
{
this.index = -1;
}
/**
* Returns the underlying map array used by this data source.
*
* @return the underlying map array
*/
public Object[] getData()
{
return records;
}
/**
* Returns the total number of records/maps that this data source
* contains.
*
* @return the total number of records of this data source
*/
public int getRecordCount()
{
return records == null ? 0 : records.length;
}
/**
* Clones this data source by creating a new instance that reuses the same
* underlying map array.
*
* @return a clone of this data source
*/
public JRMapArrayDataSource cloneDataSource()
{
return new JRMapArrayDataSource(records);
}
}