predicate

type BoolFilter ¶

type BoolFilter struct {
	Include []bool `json:",omitempty"`
	Exclude []bool `json:",omitempty"`
}

BoolFilter is the reduced bool filter payload shape.

type Criteria ¶ added in v1.0.0

type Criteria struct {
	Expression   string
	Placeholders []any
}

Criteria is the SQL fragment produced by a custom predicate handler.

type Handler ¶ added in v1.0.0

type Handler interface {
	Compute(context.Context, any) (*Criteria, error)
}

Handler computes one predicate fragment from a bound input value.

type HandlerFunc ¶ added in v1.0.0

type HandlerFunc func(context.Context, any) (*Criteria, error)

HandlerFunc adapts a function to Handler.

func (f HandlerFunc) Compute(ctx context.Context, value any) (*Criteria, error)

type IntFilter ¶

type IntFilter struct {
	Include []int `json:",omitempty"`
	Exclude []int `json:",omitempty"`
}

IntFilter is the reduced int filter payload shape.

type Lookup ¶ added in v1.0.0

type Lookup interface {
	Lookup(name string) (*Template, error)
}

Lookup defines the minimal read-only predicate-template registry contract.

type NamedArgument ¶

type NamedArgument struct {
	Name     string
	Position int
}

NamedArgument describes one named template argument.

type NamedFilter ¶

type NamedFilter struct {
	Name    string   `xls:"name=Filter"`
	Include []string `json:",omitempty"`
	Exclude []string `json:",omitempty"`
}

NamedFilter groups include/exclude values under one named filter.

type NamedFilters ¶

type NamedFilters []*NamedFilter

NamedFilters is the reduced public filter payload contract.

type NotifierFn ¶

type NotifierFn func(template *Template)

type Registry ¶

type Registry struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func New() *Registry

func (r *Registry) Lookup(name string) (*Template, error)

type StringsFilter ¶

type StringsFilter struct {
	Include []string `json:",omitempty"`
	Exclude []string `json:",omitempty"`
}

StringsFilter is the reduced string filter payload shape.

type Template ¶

type Template struct {
	Name   string
	Source string
	Args   []*NamedArgument
}

Template is the public predicate-template contract.