Bug 180426 In library, do not allowed the dataset drag in to the row and column area of cross tab[1102]
Description: In library do not allowed the dataset drag in to the row and column area of cross tab[1102] Build number: 2.2.0.v20070402-0630 Steps to reproduce: Try to drag a dataset in data explorer into the row area and column area in x-tab. The plus icon show the operation is allowed, But after the insertion, error occurs. Expected result: The dataset is not allowed to insert into the row and column area Error log: java.lang.ClassCastException: org.eclipse.birt.report.item.crosstab.internal.ui.editors.model.VirtualCrosstabCellAdapter at org.eclipse.birt.report.designer.core.commands.CreateCommand.execute(CreateCommand.java:102) at org.eclipse.birt.report.designer.internal.ui.command.WrapperCommandStack.execute(WrapperCommandStack.java:86) at org.eclipse.gef.dnd.AbstractTransferDropTargetListener.handleDrop(AbstractTransferDropTargetListener.java:314) at org.eclipse.gef.dnd.TemplateTransferDropTargetListener.handleDrop(TemplateTransferDropTargetListener.java:101) at org.eclipse.birt.report.designer.internal.ui.palette.ReportTemplateTransferDropTargetListener.handleDrop(ReportTemplateTransferDropTargetListener.java:230) at org.eclipse.gef.dnd.AbstractTransferDropTargetListener.drop(AbstractTransferDropTargetListener.java:171) at org.eclipse.jface.util.DelegatingDropAdapter$3.run(DelegatingDropAdapter.java:211)
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/palette/ReportTemplateTransferDropTargetListener.java
}
		else if ( handleValidateInsert( template ) )
		{
			transName = InsertInLayoutAction.DISPLAY_TEXT;
			Object objectType = getFactory( template ).getObjectType( );
			if ( objectType instanceof DataSetHandle )
			{
				preHandle = new DataSetToolExtends( );
			}
			else if ( objectType instanceof DataSetItemModel )
			{
				preHandle = new DataSetColumnToolExtends( );
			}
			else if ( objectType instanceof ResultSetColumnHandle )
			{
				isResultSetColumn = true;
				preHandle = new DataSetColumnToolExtends( );
			}
			else if ( objectType instanceof ScalarParameterHandle )
			{
				isScalarparameter = true;
				preHandle = new ParameterToolExtends( );
			}
			else if ( objectType instanceof DimensionHandle )
			{
				preHandle = new DimensionHandleToolExtends( );
			}
			else if ( objectType instanceof MeasureHandle )
			{
				preHandle = new MeasureHandleToolExtends( );