[PATCH] JRHashtableArrayDataSource

[ktrinad]

By: Daniel Ruoso - ruoso

[PATCH] JRHashtableArrayDataSource

2003-12-23 15:17

I think it would be interesting to get a report filled from an array of Hashtables, since I can automatically convert SQLs into arrays of Hashtables, it would be nice to fill the report without filling a table model or creating a custom java bean class... So... here goes the source code for JRHashtableArrayDataSource.java (I wish it would be included into the main distribution of jasper to encourage iReport team to add native support to it).

 

===== BEGIN SOURCE CODE =====

/*

* ============================================================================

* The JasperReports License, Version 1.0

* ============================================================================

*

* Copyright © 2001-2004 Teodor Danciu (teodord@users.sourceforge.net). All rights reserved.

*

* Redistribution and use in source and binary forms, with or without modification,

* are permitted provided that the following conditions are met:

*

* 1. Redistributions of source code must retain the above copyright notice,

* this list of conditions and the following disclaimer.

*

* 2. Redistributions in binary form must reproduce the above copyright notice,

* this list of conditions and the following disclaimer in the documentation

* and/or other materials provided with the distribution.

*

* 3. The end-user documentation included with the redistribution, if any, must

* include the following acknowledgment: "This product includes software

* developed by Teodor Danciu (http://jasperreports.sourceforge.net)."

* Alternately, this acknowledgment may appear in the software itself, if

* and wherever such third-party acknowledgments normally appear.

*

* 4. The name "JasperReports" must not be used to endorse or promote products

* derived from this software without prior written permission. For written

* permission, please contact teodord@users.sourceforge.net.

*

* 5. Products derived from this software may not be called "JasperReports", nor

* may "JasperReports" appear in their name, without prior written permission

* of Teodor Danciu.

*

* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,

* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

* APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-

* DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

 

/*

* ============================================================================

* GNU Lesser General Public License

* ============================================================================

*

* JasperReports - Free Java report-generating library.

* Copyright © 2001-2004 Teodor Danciu teodord@users.sourceforge.net

*

* This library 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 2.1 of the License, or (at your option) any later version.

*

* This library 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 this library; if not, write to the Free Software

* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

*

* Teodor Danciu

* 173, Calea Calarasilor, Bl. 42, Sc. 1, Ap. 18

* Postal code 030615, Sector 3

* Bucharest, ROMANIA

* Email: teodord@users.sourceforge.net

*/

 

/*

* Contributors:

* Artur Biesiadowski - abies@users.sourceforge.net

* Daniel Ruoso - daniel@ruoso.com

*/

package dori.jasper.engine.data;

 

import java.util.Hashtable;

import dori.jasper.engine.JRException;

import dori.jasper.engine.JRField;

import dori.jasper.engine.JRRewindableDataSource;

 

 

/**

*

*/

public class JRHashtableArrayDataSource implements JRRewindableDataSource

{

 

 

/**

*

*/

private Hashtable[] data = null;

private int index = -1;

 

 

/**

*

*/

public JRHashtableArrayDataSource(Hashtable[] data)

{

this.data = data;

}

 

 

/**

*

*/

public boolean next() throws JRException

{

this.index++;

 

if (data != null)

{

return (this.index < this.data.length);

}

else

{

return false;

}

}

 

 

/**

*

*/

public Object getFieldValue(JRField jrField) throws JRException

{

// If this method is called before any next(), it will fallback to

// the first element;

if ( data == null || (index == -1 && !next())) {

throw new JRException("No data found.");

}

if (data[index] == null) {

// but if the row is null, there must be something wrong

throw new JRException("Null row found in data source.");

}

 

String fieldName = jrField.getName();

 

 

if (this.data[index].containsKey(fieldName))

{

return this.data[index].get(fieldName);

}

else if (fieldName.startsWith("COLUMN_"))

{

return this.data[index].get(fieldName.substring(7));

}

else

{

// If this field is null, it is not into the Hashtable,

// we must return null, because there can't be no

// null value inside a Hashtable.

return null;

}

}

 

 

/**

*

*/

public void moveFirst() throws JRException

{

this.index = -1;

}

 

 

}

 

==== END SOURCE CODE =====

 

 

By: Teodor Danciu - teodord

RE: [PATCH] JRHashtableArrayDataSource

2004-01-09 14:16

 

Hi,

 

In the CVS repository version there are now two

more data sources provided:

 

JRMapCollectionDataSource

JRMapArrayDataSource

 

Thank you,

Teodor