Bug 196748 Report Designer implementation of BPS80 - result set sharing
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
if ( txtName != null
				&& ( txtName.getText( ) == null || txtName.getText( )
						.trim( )
						.equals( "" ) ) ) 
		{
			if ( dialog.getOkButton( ) != null )
				dialog.getOkButton( ).setEnabled( false );
		}
		else if ( txtExpression != null
				&& ( txtExpression.getText( ) == null || txtExpression.getText( )
						.trim( )
						.equals( "" ) ) ) 
		{
			if ( dialog.getOkButton( ) != null )
				dialog.getOkButton( ).setEnabled( false );
		}
		else
		{
			if ( this.binding == null )
			{
				for ( Iterator iterator = this.bindingHolder.getColumnBindings( )
						.iterator( ); iterator.hasNext( ); )
				{
					ComputedColumnHandle computedColumn = (ComputedColumnHandle) iterator.next( );
					if ( computedColumn.getName( ).equals( txtName.getText( ) ) )
					{
						if ( dialog.getOkButton( ) != null )
							dialog.getOkButton( ).setEnabled( false );
						this.messageLine.setText( Messages.getFormattedString( "BindingDialogHelper.error.nameduplicate", 
								new Object[]{