Bug 193913 Adding a aggregate with a column binding name that already exists should display a proper message
Build ID: 2.2RC3 Steps To Reproduce: 1.Add table to report 2.Add aggregation to table (Column Binding Name = "TEST") 3.Remove aggregate from table (the binding remains in the list of column bindings for this table) 4.Try to add the same aggregate to table (Column Binding Name = "TEST") This causes the error as shown below: An unexpected internal exception occurred.Please see log for detail. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Designer UI Plug-in ID:org.eclipse.birt.report.designer.ui Version:2.2.0.v20070613 Error Code:Error.GUIException.invokedByUnexpectedException Error Message:Caused by java.lang.NullPointerException. It should rather display a message that the binding already exists or just use the available binding for this aggregate. More information:
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/DataColumnBindingDialog.java
{
	protected static final String DEFAULT_ITEM_NAME = "data column"; 
	protected static final String NEW_DATAITEM_TITLE = Messages.getString( "DataColumBindingDialog.title.CreateNewDataBinding" ); 
	protected static final String EDIT_DATAITEM_TITLE = Messages.getString( "DataColumBindingDialog.title.EditDataBinding" ); 
	
	protected static final String AGG_BUILDER_TITLE = Messages.getString( "DataColumBindingDialog.title.AggBuilder" ); 
	IBindingDialogHelper dialogHelper;
	private ReportItemHandle bindingObject;
	private ComputedColumnHandle bindingColumn;
	private ExpressionProvider expressionProvider;
	private boolean isAggregate;
	public DataColumnBindingDialog( boolean isCreateNew )
	{
		super( isCreateNew == true ? NEW_DATAITEM_TITLE : EDIT_DATAITEM_TITLE );
	}
	public void setInput( ReportItemHandle input )
	{
		setInput( input, null );
	}
	public DesignElementHandle getBindingObject( )
	{