# FilterCriteria

Filter criteria for Lambda event filtering.

- Source: [`aws-lambda/lib/event-source-filter.ts`](https://github.com/aws/aws-cdk/blob/v2.274.0/packages/aws-cdk-lib/aws-lambda/lib/event-source-filter.ts#L75)
- Type last changed: v2.42.0 · 16 Sep 2022

## Example

```ts
import * as dynamodb from 'aws-cdk-lib/aws-dynamodb';
import { DynamoEventSource } from 'aws-cdk-lib/aws-lambda-event-sources';

declare const table: dynamodb.Table;

declare const fn: lambda.Function;
fn.addEventSource(new DynamoEventSource(table, {
  startingPosition: lambda.StartingPosition.LATEST,
  filters: [
    lambda.FilterCriteria.filter({
      eventName: lambda.FilterRule.isEqual('INSERT'),
      dynamodb: {
        NewImage: {
          id: { BOOL: lambda.FilterRule.isEqual(true) },
        },
      },
    }),
  ],
}));
```

## Initializer

```ts
new FilterCriteria()
```

## Methods

- `filter(filter: { [key: string]: any }): { [key: string]: any }` (static) — Filter for event source.