reifydb-sdk 0.8.0

SDK for building ReifyDB operators, procedures, transforms and more
Documentation 
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// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2026 ReifyDB

use reifydb_codec::key::{encoded::EncodedKey, serializer::KeySerializer};
use reifydb_value::value::{Value, value_type::ValueType};
use serde::{Serialize, de::DeserializeOwned};

use super::RawStatefulOperator;
use crate::{
	error::Result,
	operator::context::{OperatorContext, StateApi},
};

pub trait KeyedStateful: RawStatefulOperator {
	type State: Serialize + DeserializeOwned;

	fn key_types(&self) -> &[ValueType];

	fn encode_key(&self, key_values: &[Value]) -> EncodedKey {
		let mut serializer = KeySerializer::new();
		for value in key_values.iter() {
			serializer.extend_value(value);
		}
		serializer.finish()
	}

	fn load_state(&self, ctx: &mut impl OperatorContext, key_values: &[Value]) -> Result<Option<Self::State>> {
		let key = self.encode_key(key_values);
		ctx.state().get::<Self::State>(&key)
	}

	fn save_state(&self, ctx: &mut impl OperatorContext, key_values: &[Value], value: &Self::State) -> Result<()> {
		let key = self.encode_key(key_values);
		ctx.state().set(&key, value)
	}

	fn remove_state(&self, ctx: &mut impl OperatorContext, key_values: &[Value]) -> Result<()> {
		let key = self.encode_key(key_values);
		ctx.state().remove(&key)
	}
}