Bug 422205 Missing help content reference in MongoDB ODA Data Set UI page
The help context ID is not referenced by the MongoDB DOA data set query page.
data/org.eclipse.birt.data.oda.mongodb.ui/src/org/eclipse/birt/data/oda/mongodb/ui/impl/MongoDBDataSetWizardPage.java
isValid = false;
			setMessage( Messages.getString( "MongoDBDataSetWizardPage.message.error.InvalidDocumentNumber" ), 
					ERROR );
		}
		else if ( !checkAllSelectedFields( ) )
		{
			isValid = false;
		}
		else if ( !checkCommandExpression( ) )
		{
			isValid = false;
		}
		else if ( this.selectedFields.size( ) == 0 )
		{
			isValid = false;
			setMessage( Messages.getString( "MongoDBDataSetWizardPage.message.error.MissingSelectedField" ), 
					ERROR );
		}
		if ( isValid )
			setMessage( DEFAULT_MESSAGE );
		setPageComplete( isValid );
		return isValid;
	}
	/**
	 * Indicates whether the custom page has valid data to proceed with defining
	 * a data set.
	 */
	private boolean hasValidData( )
	{
		validateData( );