arrow-store/lib/transformers/expressionTransformer.d.ts

TypeScript DynamoDB ORM

import { ParserNode } from "../parser/nodes";
import { AttributeValue } from "aws-sdk/clients/dynamodb";
import { DYNAMODB_ATTRIBUTE_TYPE, DynamoDBAttributeSchema } from "../mappers/schemaBuilders";
export declare type ExpressionAttribute = {
    accessor: string;
    schema: DynamoDBAttributeSchema;
};
export declare type TraversalContext = {
    stack: string[];
    contextParameters: any | undefined;
    rootParameterName?: string;
    contextParameterName?: string;
    recordSchema: ReadonlyMap<string, DynamoDBAttributeSchema>;
    attributeNames: Map<string, string>;
    attributeNameAliases: Map<string, ExpressionAttribute>;
    attributeValues: Map<string, AttributeValue>;
    attributeValueAliases: Map<string, string>;
};
export declare type ObjectAccessorValue = {
    isRecordAccessor: boolean;
    value: string | null;
};
export declare type ExpressionTransformer = {
    transform(recordSchema: ReadonlyMap<string, DynamoDBAttributeSchema>, expression: ParserNode, context?: any): string;
};
export declare abstract class ExpressionTransformerBase implements ExpressionTransformer {
    private readonly _attributeNamePrefix;
    private readonly _attributePathSchema;
    protected constructor(attributeNamePrefix: string, attributePathSchema: Map<string, DynamoDBAttributeSchema>);
    abstract transform(recordSchema: ReadonlyMap<string, DynamoDBAttributeSchema>, expression: ParserNode, context?: any): string;
    protected getOrSetAttributeReference(expression: ParserNode, context: TraversalContext): ObjectAccessorValue;
    protected getAttributeTypeByPath(attributePath: string | null, context: TraversalContext): DYNAMODB_ATTRIBUTE_TYPE;
    protected getOrSetAttributeValue(accessorValue: ObjectAccessorValue, attributeType: DYNAMODB_ATTRIBUTE_TYPE, context: TraversalContext): string;
    protected getOrSetAttributePath(memberPath: string, context: TraversalContext): string | null;
    protected evaluateContextValue(accessors: string[], contextParameters: any): string;
}