All files / src/evaluation-context map-accessor.ts

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import type { EvaluationContext } from './evaluation-context.js';
import { TypedValue } from '../typed-value.js';
import type { PropertyAccessor } from './property-accessor.js';
 
export class MapAccessor implements PropertyAccessor {
  public getSpecificTargetClasses(): null {
    return null;
  }
 
  public canRead(_context: EvaluationContext, target: unknown, _name: string): boolean {
    if (target === null || target === undefined) return false;
    return target instanceof Map;
  }
 
  public read(_context: EvaluationContext, target: unknown, name: string): TypedValue {
    const map = target as Map<string, unknown>;
    if (!map.has(name)) {
      return TypedValue.NULL;
    }
    return new TypedValue(map.get(name));
  }
 
  public canWrite(_context: EvaluationContext, target: unknown, _name: string): boolean {
    return target instanceof Map;
  }
 
  public write(
    _context: EvaluationContext,
    target: unknown,
    name: string,
    newValue: unknown,
  ): void {
    (target as Map<string, unknown>).set(name, newValue);
  }
}