predicate

package

v0.9.0 Latest Latest Go to latest Published: Sep 3, 2017 License: Apache-2.0 Imports: 7 Imported by: 0

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Repository

ghproxy-9d2.pages.dev/google/badwolf

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Documentation ¶

Overview ¶

Package predicate allows to build and manipulate BadWolf predicates.

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type ID ¶

type ID string

ID represents a predicate ID.

func (*ID) String ¶

func (i *ID) String() string

String converts a ID to its string form.

type Predicate ¶

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

Predicate represents a BadWolf predicate.

func NewImmutable ¶

func NewImmutable(id string) (*Predicate, error)

NewImmutable creates a new immutable predicate.

func NewTemporal ¶

func NewTemporal(id string, t time.Time) (*Predicate, error)

NewTemporal creates a new temporal predicate.

func Parse ¶

func Parse(s string) (*Predicate, error)

Parse converts a pretty printed predicate into a predicate.

func (*Predicate) ID ¶

func (p *Predicate) ID() ID

ID returns the ID of the predicate.

func (*Predicate) String ¶

func (p *Predicate) String() string

String returns the pretty printed version of the predicate.

func (*Predicate) TimeAnchor ¶

func (p *Predicate) TimeAnchor() (*time.Time, error)

TimeAnchor attempts to return the time anchor of a predicate if its type is temporal.

func (*Predicate) Type ¶

func (p *Predicate) Type() Type

Type returns the type of the predicate.

func (*Predicate) UUID ¶ added in v0.5.0

func (p *Predicate) UUID() uuid.UUID

UUID returns a global unique identifier for the given predicate. It is implemented as the SHA1 UUID of the predicate values.

type Type ¶

type Type uint8

Type describes the two type of predicates in BadWolf

const (
	// Immutable predicates are always valid and not bound to any time anchor.
	Immutable Type = iota
	// Temporal predicates are anchored in the time continuum and valid depending
	// on the reasoning engine and the granularity of the reasoning.
	Temporal
)

func (Type) String ¶

func (t Type) String() string

String returns a pretty printed type.

Source Files ¶

predicate.go

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