fieldpath

Documentation

Overview

Package fieldpath supplies methods for extracting fields from objects given a path to a field.

Index

• func ExtractFieldPath(obj interface{}, fieldPath string) ([]string, []string, error)
• func SplitMaybeSubscriptedPath(fieldPath string) (string, string, bool)

Functions

func ExtractFieldPath

func ExtractFieldPath(obj interface{}, fieldPath string) ([]string, []string, error)

ExtractFieldPath extracts the field(s) from the given object and returns the value as string, along with the expanded value of any wildcard values.

Multiple keys and values are guaranteed to be sorted in key order. If a wildcard path was given, keys is not nil.

func SplitMaybeSubscriptedPath

func SplitMaybeSubscriptedPath(fieldPath string) (string, string, bool)

SplitMaybeSubscriptedPath checks whether the specified fieldPath is subscripted, and

• if yes, this function splits the fieldPath into path and subscript, and returns (path, subscript, true).
• if no, this function returns (fieldPath, "", false).

Example inputs and outputs:

"metadata.annotations['myKey']" --> ("metadata.annotations", "myKey", true)
"metadata.annotations['a[b]c']" --> ("metadata.annotations", "a[b]c", true)
"metadata.labels['']"           --> ("metadata.labels", "", true)
"metadata.labels"               --> ("metadata.labels", "", false)