# MapJsonataProps

Properties for defining a Map state that using JSONata.

Extends: MapJsonataProps
Extends: StateBaseProps, MapBaseOptions, MapBaseJsonataOptions

- Source: [`aws-stepfunctions/lib/states/map.ts`](https://github.com/aws/aws-cdk/blob/v2.274.0/packages/aws-cdk-lib/aws-stepfunctions/lib/states/map.ts#L32)
- Type last changed: v2.178.0 · 6 Feb 2025

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_stepfunctions as stepfunctions } from 'aws-cdk-lib';

declare const assign: any;
declare const itemSelector: any;
declare const outputs: any;
declare const parameters: any;
declare const provideItems: stepfunctions.ProvideItems;
const mapJsonataProps: stepfunctions.MapJsonataProps = {
  assign: {
    assignKey: assign,
  },
  comment: 'comment',
  items: provideItems,
  itemSelector: {
    itemSelectorKey: itemSelector,
  },
  jsonataItemSelector: 'jsonataItemSelector',
  jsonataMaxConcurrency: 'jsonataMaxConcurrency',
  maxConcurrency: 123,
  outputs: outputs,
  parameters: {
    parametersKey: parameters,
  },
  queryLanguage: stepfunctions.QueryLanguage.JSON_PATH,
  stateName: 'stateName',
};
```

## Properties

- `assign`: { [key: string]: any } — Workflow variables to store in this step.

  **Default:** Not assign variables

  Using workflow variables, you can store data in a step and retrieve that data in future steps.

- `comment`: string — A comment describing this state.

  **Default:** No comment

- `items`: [ProvideItems](/cdk/api/v2/docs/aws-cdk-lib.aws_stepfunctions.ProvideItems.html) — The array that the Map state will iterate over.

  **Default:** The state input as is.

- `itemSelector`: { [key: string]: any } = $ — The JSON that you want to override your default iteration input (mutually exclusive with `parameters` and `jsonataItemSelector`).

- `jsonataItemSelector`: string = $ — Jsonata expression that evaluates to a JSON array to override your default iteration input (mutually exclusive with `parameters` and `itemSelector`).

  Example value: `{% {\"foo\": \"foo\", \"input\": $states.input} %}`

- `jsonataMaxConcurrency`: string — JSONata expression for MaxConcurrency.

  **Default:** full concurrency

  A JSONata expression that evaluates to an integer, specifying the maximum
  concurrency dynamically. Mutually exclusive with `maxConcurrency` and
  `maxConcurrencyPath`.

  Example value: `{% $states.input.maxConcurrency %}`

- `maxConcurrency`: number — MaxConcurrency.

  **Default:** full concurrency

  An upper bound on the number of iterations you want running at once.

- `outputs`: any — Used to specify and transform output from the state.

  **Default:** $states.result or $states.errorOutput

  When specified, the value overrides the state output default.
  The output field accepts any JSON value (object, array, string, number, boolean, null).
  Any string value, including those inside objects or arrays,
  will be evaluated as JSONata if surrounded by {% %} characters.
  Output also accepts a JSONata expression directly.

- `parameters`: { [key: string]: any } = $ — Step Functions has deprecated the `parameters` field in favor of the new `itemSelector` field

- `queryLanguage`: [QueryLanguage](/cdk/api/v2/docs/aws-cdk-lib.aws_stepfunctions.QueryLanguage.html) = JSONPath — The name of the query language used by the state.

  If the state does not contain a `queryLanguage` field,
  then it will use the query language specified in the top-level `queryLanguage` field.

- `stateName`: string — Optional name for this state.

  **Default:** The construct ID will be used as state name