Function hasPath

ui/src/protocol/path-resolver.ts:325–362

(data: DataValue, path: string)

 * @returns 路径是否存在
 */
export function hasPath(data: DataValue, path: string): boolean {
  if (!isValidJsonPointer(path)) {
    return false;
  }

  if (path === '') {
    return true;
  }

  const tokens = parseJsonPointer(path);
  let current: DataValue | undefined = data;

  for (const token of tokens) {
    if (current === null || current === undefined) {
      return false;
    }

    if (Array.isArray(current)) {
      const index = parseInt(token, 10);
      if (isNaN(index) || index < 0 || index >= current.length) {
        return false;
      }
      current = current[index] as DataValue | undefined;
    }
    else if (typeof current === 'object') {
      const obj = current as DataMap;
      if (!(token in obj)) {
        return false;
      }
      current = obj[token];
    }
    else {
      return false;
    }
  }

  return true;
}

/**
 * 删除数据模型中指定路径的数据