Bug 202254 Exception is thrown when category values are null and type of X axis is set to DateTime
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/data/util/DataAdapterFactory.java
import org.eclipse.birt.chart.model.data.*;
import org.eclipse.birt.chart.model.data.Action;
import org.eclipse.birt.chart.model.data.BaseSampleData;
import org.eclipse.birt.chart.model.data.DataElement;
import org.eclipse.birt.chart.model.data.DataPackage;
import org.eclipse.birt.chart.model.data.DataSet;
import org.eclipse.birt.chart.model.data.DateTimeDataElement;
import org.eclipse.birt.chart.model.data.DateTimeDataSet;
import org.eclipse.birt.chart.model.data.NumberDataElement;
import org.eclipse.birt.chart.model.data.NumberDataSet;
import org.eclipse.birt.chart.model.data.OrthogonalSampleData;
import org.eclipse.birt.chart.model.data.Query;
import org.eclipse.birt.chart.model.data.Rule;
import org.eclipse.birt.chart.model.data.SampleData;
import org.eclipse.birt.chart.model.data.SeriesDefinition;
import org.eclipse.birt.chart.model.data.SeriesGrouping;
import org.eclipse.birt.chart.model.data.StockDataSet;
import org.eclipse.birt.chart.model.data.TextDataSet;
import org.eclipse.birt.chart.model.data.Trigger;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.common.notify.impl.AdapterFactoryImpl;
import org.eclipse.emf.ecore.EObject;
/**
 * <!-- begin-user-doc --> The <b>Adapter Factory </b> for the model. It provides an adapter <code>createXXX</code>
 * method for each class of the model. <!-- end-user-doc -->
 * @see org.eclipse.birt.chart.model.data.DataPackage
 * @generated
 */
public class DataAdapterFactory extends AdapterFactoryImpl