AggregatingFunction

drasi_core::evaluation::functions

Trait AggregatingFunction 

Source 
pub trait AggregatingFunction:
    Debug
    + Send
    + Sync {
    // Required methods
    fn initialize_accumulator(
        &self,
        context: &ExpressionEvaluationContext<'_>,
        expression: &FunctionExpression,
        grouping_keys: &Vec<VariableValue>,
        index: Arc<dyn ResultIndex>,
    ) -> Accumulator;
    fn apply<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        context: &'life1 ExpressionEvaluationContext<'_>,
        args: Vec<VariableValue>,
        accumulator: &'life2 mut Accumulator,
    ) -> Pin<Box<dyn Future<Output = Result<VariableValue, FunctionError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
    fn revert<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        context: &'life1 ExpressionEvaluationContext<'_>,
        args: Vec<VariableValue>,
        accumulator: &'life2 mut Accumulator,
    ) -> Pin<Box<dyn Future<Output = Result<VariableValue, FunctionError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
    fn snapshot<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        context: &'life1 ExpressionEvaluationContext<'_>,
        args: Vec<VariableValue>,
        accumulator: &'life2 Accumulator,
    ) -> Pin<Box<dyn Future<Output = Result<VariableValue, FunctionError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
    fn accumulator_is_lazy(&self) -> bool;
}

Required Methods§

Source

fn initialize_accumulator( &self, context: &ExpressionEvaluationContext<'_>, expression: &FunctionExpression, grouping_keys: &Vec<VariableValue>, index: Arc<dyn ResultIndex>, ) -> Accumulator

Source

fn apply<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, context: &'life1 ExpressionEvaluationContext<'_>, args: Vec<VariableValue>, accumulator: &'life2 mut Accumulator, ) -> Pin<Box<dyn Future<Output = Result<VariableValue, FunctionError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Source

fn revert<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, context: &'life1 ExpressionEvaluationContext<'_>, args: Vec<VariableValue>, accumulator: &'life2 mut Accumulator, ) -> Pin<Box<dyn Future<Output = Result<VariableValue, FunctionError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Source

fn snapshot<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, context: &'life1 ExpressionEvaluationContext<'_>, args: Vec<VariableValue>, accumulator: &'life2 Accumulator, ) -> Pin<Box<dyn Future<Output = Result<VariableValue, FunctionError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Source

fn accumulator_is_lazy(&self) -> bool

Implementors§