Bug 417305 A sample chart has no data
chart/org.eclipse.birt.chart.examples/src/org/eclipse/birt/chart/examples/view/models/WorkingWithBIRTDataEngine.java
/*******************************************************************************
 * Copyright (c) 2008 Actuate Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.chart.examples.view.models;
import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.birt.chart.examples.ChartExamplesPlugin;
import org.eclipse.birt.chart.examples.view.util.GroupedRowExpressionsEvaluator;
import org.eclipse.birt.chart.exception.ChartException;
import org.eclipse.birt.chart.factory.Generator;
import org.eclipse.birt.chart.factory.IDataRowExpressionEvaluator;