?? datatarget.java
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/**
* ========================================
* JFreeReport : a free Java report library
* ========================================
*
* Project Info: http://www.jfree.org/jfreereport/index.html
* Project Lead: Thomas Morgner;
*
* (C) Copyright 2000-2002, by Simba Management Limited and Contributors.
*
* 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.
*
* ---------------
* DataTarget.java
* ---------------
* (C)opyright 2002, by Thomas Morgner and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): David Gilbert (for Simba Management Limited);
*
* $Id: DataTarget.java,v 1.2 2003/08/24 15:13:22 taqua Exp $
*
* Changes
* -------
* 20-May-2002 : Initial version
* 06-Jun-2002 : Updated Javadoc comments.
* 03-Jul-2002 : Cloneable and Serializable
*/
package org.jfree.report.filter;
import java.io.Serializable;
/**
* A DataTarget is a consumer in the DataProcessing chain. All Elements are DataTargets.
* Targets query their data from assigned DataSources.
*
* @author Thomas Morgner
*/
public interface DataTarget extends Serializable, Cloneable
{
/**
* Returns the assigned DataSource for this Target.
*
* @return The datasource.
*/
public DataSource getDataSource();
/**
* Assigns a DataSource for this Target.
*
* @param ds The data source.
*/
public void setDataSource(DataSource ds);
/**
* Clones this datatarget.
*
* @return a clone of the datatarget.
*
* @throws CloneNotSupportedException this should never happen.
*/
public Object clone() throws CloneNotSupportedException;
}
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