/*
* (C) Copyright 2000 - 2003 Nabh Information Systems, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
package com.nabhinc.portlet.chart;
import javax.portlet.PortletConfig;
import javax.portlet.PortletException;
import org.jfree.data.AbstractDataset;
/**
*
*
* @author Padmanabh Dabke
* (c) 2002, 2003 Nabh Information Systems, Inc. All Rights Reserved.
*/
public abstract class BaseJDBCDataset extends AbstractDataset implements ChartDataSource {
public static final String DATA_SOURCE_INIT_PARAM = "dataSource";
public static final String SQL_INIT_PARAM = "sql";
/**
* JNDI name of the data source
*/
protected String bjdsDataSource = null;
/**
* SQL query
*/
protected String bjdsSQL = null;
public abstract void executeQuery() throws PortletException;
public abstract void createDummyData();
public void retrieveChartData() throws PortletException {
if (bjdsSQL != null) executeQuery();
else createDummyData();
}
/**
* Initalizes data and executes database query to populate the dataset.
* @param datasource Database datasource, e.g. jdbc/sbtour
* @param config SQL query command.
*/
public void init(PortletConfig config) throws PortletException {
// Get data source configuration.
bjdsDataSource = config.getInitParameter(DATA_SOURCE_INIT_PARAM);
if (bjdsDataSource == null) {
throw new PortletException (
"Missing required chart data source init parameter: " +
DATA_SOURCE_INIT_PARAM);
}
bjdsSQL = config.getInitParameter(SQL_INIT_PARAM);
}
}
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