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/BindingDialogHelper.java
groups[i] = ( (GroupHandle) listingHandle.getGroups( ).get( i ) ).getName( );
			}
			return groups;
		}
		return new String[0];
	}
	private void setDataFieldExpression( String expression )
	{
		this.expression = expression;
		if ( expression != null )
		{
			if ( cmbDataField != null && !cmbDataField.isDisposed( ) )
			{
				cmbDataField.setText( expression );
			}
			if ( txtExpression != null && !txtExpression.isDisposed( ) )
			{
				txtExpression.setText( expression );
			}
		}
	}
	private void setName( String name )
	{
		this.name = name;
		if ( name != null && txtName != null )
			txtName.setText( name );
	}
	private void setDisplayName( String displayName )
	{
		if ( displayName != null && txtDisplayName != null )