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
}
	private boolean handleValidateLibrary( Object dragObj )
	{
		EditPart targetEditPart = getTargetEditPart( );
		if ( targetEditPart == null )
		{
			return true;
		}
		if ( dragObj != null )
		{
			Object[] dragObjs;
			if ( dragObj instanceof Object[] )
			{
				dragObjs = (Object[]) dragObj;
			}
			else
			{
				dragObjs = new Object[]{
					dragObj
				};
			}
			if ( dragObjs.length == 0 )
			{
				return false;
			}
			for ( int i = 0; i < dragObjs.length; i++ )
			{
				dragObj = dragObjs[i];
				if ( dragObj instanceof ReportElementHandle )
				{