38 lines
1.8 KiB
TypeScript
38 lines
1.8 KiB
TypeScript
import { CallbackManagerForChainRun, Callbacks } from "@langchain/core/callbacks/manager";
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import { ChainValues } from "@langchain/core/utils/types";
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import { ChainInputs, BaseChain } from "./base.js";
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/**
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* Interface that extends the `ChainInputs` interface and defines the
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* fields required for a transform chain. It includes the `transform`
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* function, `inputVariables`, and `outputVariables` properties.
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*
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* @deprecated
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* Switch to expression language: https://js.langchain.com/docs/expression_language/
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* Will be removed in 0.2.0
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*/
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export interface TransformChainFields<I extends ChainValues, O extends ChainValues> extends ChainInputs {
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transform: (values: I, callbacks?: Callbacks) => O | Promise<O>;
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inputVariables: (keyof I extends string ? keyof I : never)[];
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outputVariables: (keyof O extends string ? keyof O : never)[];
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}
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/**
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* Class that represents a transform chain. It extends the `BaseChain`
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* class and implements the `TransformChainFields` interface. It provides
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* a way to transform input values to output values using a specified
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* transform function.
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*
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* @deprecated
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* Switch to {@link https://js.langchain.com/docs/expression_language/ | expression language}.
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* Will be removed in 0.2.0
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*/
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export declare class TransformChain<I extends ChainValues, O extends ChainValues> extends BaseChain {
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static lc_name(): string;
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transformFunc: (values: I, callbacks?: Callbacks) => O | Promise<O>;
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inputVariables: (keyof I extends string ? keyof I : never)[];
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outputVariables: (keyof O extends string ? keyof O : never)[];
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_chainType(): "transform";
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get inputKeys(): (keyof I extends string ? keyof I : never)[];
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get outputKeys(): (keyof O extends string ? keyof O : never)[];
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constructor(fields: TransformChainFields<I, O>);
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_call(values: I, runManager?: CallbackManagerForChainRun): Promise<O>;
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}
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