/**
 * VTL Processor using velocits engine
 * Matches the behavior of the Java implementation
 */
export declare class VTLProcessor {
    private velocityEngine;
    constructor();
    /**
     * Process a VTL template with input and context
     * @param template - The VTL template string
     * @param inputString - The raw input/body string (defaults to empty string)
     * @param contextJson - The context JSON string (defaults to empty object)
     * @returns The processed output string
     */
    process(template: string, inputString?: string, contextJson?: string): string;
    /**
     * Add AWS API Gateway custom functions to the velocity context
     */
    private addApiGatewayFunctions;
    /**
     * Create an input object that exposes both methods and properties
     * This allows VTL to access $input.body as a property and $input.json() as a method
     */
    private createInputObject;
    /**
     * Convert a ContextFunctions object to a plain object with properties
     * This allows VTL to access $context.identity.sourceIp as a property path
     */
    private createContextObject;
}
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