FieldPathHelper.java 文件源码

/**
 * Returns {@link FieldPath} equivalent of the specified {@link SchemaPath}.
 *
 * @param schemaPath {@link SchemaPath} instance that should be converted
 * @return {@link FieldPath} equivalent of the specified {@link SchemaPath}.
 */
public static FieldPath schemaPathToFieldPath(SchemaPath schemaPath) {
  Deque<PathSegment> pathSegments = Queues.newArrayDeque();
  PathSegment pathSegment = schemaPath.getRootSegment();
  while (pathSegment != null) {
    pathSegments.push(pathSegment);
    pathSegment = pathSegment.getChild();
  }

  FieldSegment child = null;
  while (!pathSegments.isEmpty()) {
    pathSegment = pathSegments.pop();
    if (pathSegment.isNamed()) {
      child = new FieldSegment.NameSegment(((PathSegment.NameSegment) pathSegment).getPath(), child, false);
    } else {
      child = new FieldSegment.IndexSegment(String.valueOf(((PathSegment.ArraySegment) pathSegment).getIndex()), child);
    }
  }
  return new FieldPath((FieldSegment.NameSegment) child);
}