import { Deserializer, DeserializerConfig, FieldTransform, RuleContext, SerdeType, Serializer, SerializerConfig } from "./serde";
import { Client, SchemaInfo } from "../schemaregistry-client";
import Ajv, { ErrorObject } from "ajv";
import { DereferencedJSONSchemaDraft07, DereferencedJSONSchemaDraft2020_12 } from '@criteria/json-schema';
import { LRUCache } from "lru-cache";
import { RuleRegistry } from "./rule-registry";
export interface ValidateFunction {
    (this: any, data: any): boolean;
    errors?: null | ErrorObject[];
}
export type DereferencedJSONSchema = DereferencedJSONSchemaDraft07 | DereferencedJSONSchemaDraft2020_12;
export type JsonSerdeConfig = ConstructorParameters<typeof Ajv>[0] & {
    validate?: boolean;
};
export interface JsonSerde {
    schemaToTypeCache: LRUCache<string, DereferencedJSONSchema>;
    schemaToValidateCache: LRUCache<string, ValidateFunction>;
}
/**
 * JsonSerializerConfig is the configuration for the JsonSerializer.
 */
export type JsonSerializerConfig = SerializerConfig & JsonSerdeConfig;
/**
 * JsonSerializer is a serializer for JSON messages.
 */
export declare class JsonSerializer extends Serializer implements JsonSerde {
    schemaToTypeCache: LRUCache<string, DereferencedJSONSchema>;
    schemaToValidateCache: LRUCache<string, ValidateFunction>;
    /**
     * Creates a new JsonSerializer.
     * @param client - the schema registry client
     * @param serdeType - the serializer type
     * @param conf - the serializer configuration
     * @param ruleRegistry - the rule registry
     */
    constructor(client: Client, serdeType: SerdeType, conf: JsonSerializerConfig, ruleRegistry?: RuleRegistry);
    /**
     * Serializes a message.
     * @param topic - the topic
     * @param msg - the message
     */
    serialize(topic: string, msg: any): Promise<Buffer>;
    fieldTransform(ctx: RuleContext, fieldTransform: FieldTransform, msg: any): Promise<any>;
    toType(info: SchemaInfo): Promise<DereferencedJSONSchema>;
    toValidateFunction(info: SchemaInfo): Promise<ValidateFunction | undefined>;
    static messageToSchema(msg: any): DereferencedJSONSchema;
}
/**
 * JsonDeserializerConfig is the configuration for the JsonDeserializer.
 */
export type JsonDeserializerConfig = DeserializerConfig & JsonSerdeConfig;
/**
 * JsonDeserializer is a deserializer for JSON messages.
 */
export declare class JsonDeserializer extends Deserializer implements JsonSerde {
    schemaToTypeCache: LRUCache<string, DereferencedJSONSchema>;
    schemaToValidateCache: LRUCache<string, ValidateFunction>;
    /**
     * Creates a new JsonDeserializer.
     * @param client - the schema registry client
     * @param serdeType - the deserializer type
     * @param conf - the deserializer configuration
     * @param ruleRegistry - the rule registry
     */
    constructor(client: Client, serdeType: SerdeType, conf: JsonDeserializerConfig, ruleRegistry?: RuleRegistry);
    /**
     * Deserializes a message.
     * @param topic - the topic
     * @param payload - the message payload
     */
    deserialize(topic: string, payload: Buffer): Promise<any>;
    fieldTransform(ctx: RuleContext, fieldTransform: FieldTransform, msg: any): Promise<any>;
    toType(info: SchemaInfo): DereferencedJSONSchema;
    toValidateFunction(info: SchemaInfo): Promise<ValidateFunction | undefined>;
}