Bug 195122 NPE throws out when click import value in list type dynamic parameter[0705]
Description: NPE throws out when click import value in list type dynamic parameter[0705] Build number: 2.2.0.v20070702-0630 Steps to reproduce: 1, New a dataset with no resultset 2, New a report parameter 3, Select List Box as display type 4, In static, click Import Values Expected result: No value can be imported or tell the user that no value in resultset Actual result: NPE Throws out Error log: org.eclipse.birt.report.designer.core.runtime.GUIException: Caused by java.lang.NullPointerException. at org.eclipse.birt.report.designer.core.runtime.GUIException.createGUIException(GUIException.java:76) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:135) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:117) at org.eclipse.birt.report.designer.internal.ui.dialogs.ImportValueDialog.refreshValues(ImportValueDialog.java:555) at org.eclipse.birt.report.designer.internal.ui.dialogs.ImportValueDialog.refreshColumns(ImportValueDialog.java:449)
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/DataUtil.java
* @param dataSet
	 * @param useColumnHints
	 * @param useFilters
	 * @return
	 * @throws BirtException
	 */
	public static final IBaseDataSetDesign getDataSetDesign( DataEngine engine,
			DataSetHandle dataSet, boolean useColumnHints, boolean useFilters )
			throws BirtException
	{
		if ( dataSet != null )
		{
			ModelDteApiAdapter adaptor = new ModelDteApiAdapter( );
			IBaseDataSetDesign dataSetDesign = adaptor
					.createDataSetDesign( dataSet );
			if ( !useColumnHints )
			{
				dataSetDesign.getResultSetHints( ).clear( );
			}
			if ( !useFilters )
			{
				dataSetDesign.getFilters( ).clear( );
			}
			if ( !( dataSet instanceof JointDataSetHandle ) )
			{
				IBaseDataSourceDesign dataSourceDesign = adaptor
						.createDataSourceDesign( dataSet.getDataSource( ) );
				engine.defineDataSource( dataSourceDesign );
			}
			if ( dataSet instanceof JointDataSetHandle )