jsonexpr

package

v0.24.5 Latest Latest Go to latest Published: Oct 31, 2025 License: Apache-2.0 Imports: 10 Imported by: 0

Details

Package jsonexpr provides JSON extractor expression parser.

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const (
	Index = iota + 1
	Key
)

This section is empty.

func Extract(
	d *jx.Decoder,
	paths SelectorTree,
	extract func(logql.Label, string),
) error

Extract extracts values from given paths using extract callback.

type Path []Selector

Path is a list of selectors.

func Parse(input string) (sel Path, _ error)

Parse parses selector expression.

type Selector struct {
	Type  SelectorType
	Index int
	Key   string
}

Selector is a JSON field/element selector.

func IndexSel(i int) Selector

IndexSel creates new index Selector.

func KeySel(k string) Selector

KeySel creates new key Selector.

type SelectorTree struct {
	// contains filtered or unexported fields
}

SelectorTree is a simple prefix tree of selectors. Efficient for matching multiple JSON paths.

func MakeSelectorTree(paths map[logql.Label]Path) SelectorTree

MakeSelectorTree creates a new SelectorTree from the given paths.

func (p SelectorTree) IsEmpty() bool

IsEmpty returns true if the tree is empty.

type SelectorType int

SelectorType is a Selector type.