use std::collections::BTreeMap;
use serde::{Deserialize, Serialize};
use super::bindings::Bindings;
use super::runnable::Runnable;
use super::terms::*;
use super::traces::*;
#[allow(clippy::large_enum_variant)]
#[must_use]
#[derive(Clone, Debug, Serialize, Deserialize)]
pub enum QueryEvent {
None,
/// This runnable is complete with `result`.
Done {
result: bool,
},
/// Run `runnable`, and report the result to its parent using `call_id`
/// when it completes.
#[serde(skip)]
Run {
call_id: u64,
runnable: Box<dyn Runnable>,
},
Debug {
message: String,
},
MakeExternal {
instance_id: u64,
constructor: Term,
},
ExternalCall {
/// Persistent id across all requests for results from the same external call.
call_id: u64,
/// The external instance to make this call on.
instance: Term,
/// Field name to lookup or method name to call. A class name indicates a constructor
/// should be called.
attribute: Symbol,
/// List of arguments to a method call.
args: Option<Vec<Term>>,
/// A map of keyword arguments to a method call.
kwargs: Option<BTreeMap<Symbol, Term>>,
},
/// Checks if the instance is an instance of (a subclass of) the class_tag.
ExternalIsa {
call_id: u64,
instance: Term,
class_tag: Symbol,
},
/// Starting from `base_tag`, traverse `path` fields and check if the result is an instance of
/// `class_tag`.
ExternalIsaWithPath {
call_id: u64,
base_tag: Symbol,
path: TermList,
class_tag: Symbol,
},
/// Checks if the left is more specific than right with respect to instance.
ExternalIsSubSpecializer {
call_id: u64,
instance_id: u64,
left_class_tag: Symbol,
right_class_tag: Symbol,
},
/// Checks if left class tag is a subclass or the same class as right.
ExternalIsSubclass {
call_id: u64,
left_class_tag: Symbol,
right_class_tag: Symbol,
},
Result {
bindings: Bindings,
trace: Option<TraceResult>,
},
ExternalOp {
call_id: u64,
operator: Operator,
args: TermList,
},
NextExternal {
call_id: u64,
iterable: Term,
},
}
// A struct for just Result Events. Used to pass data back into
// the core for validation and data filtering.
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct ResultEvent {
pub bindings: Bindings,
}
impl ResultEvent {
pub fn new(bindings: Bindings) -> Self {
Self { bindings }
}
}