43 行
2.0 KiB
Go
43 行
2.0 KiB
Go
package streams
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
)
|
|
|
|
// ErrNoCallbackMatch indicates a Resolver could not match the ActivityStreams value to a callback function.
|
|
var ErrNoCallbackMatch error = errors.New("activity stream did not match the callback function")
|
|
|
|
// ErrUnhandledType indicates that an ActivityStreams value has a type that is not handled by the code that has been generated.
|
|
var ErrUnhandledType error = errors.New("activity stream did not match any known types")
|
|
|
|
// ErrPredicateUnmatched indicates that a predicate is accepting a type or interface that does not match an ActivityStreams value's type or interface.
|
|
var ErrPredicateUnmatched error = errors.New("activity stream did not match type demanded by predicate")
|
|
|
|
// errCannotTypeAssertType indicates that the 'type' property returned by the ActivityStreams value cannot be type-asserted to its interface form.
|
|
var errCannotTypeAssertType error = errors.New("activity stream type cannot be asserted to its interface")
|
|
|
|
// errCannotTypeAssertPredicate indicates that a predicate cannot be type-casted to an expected function signature.
|
|
var errCannotTypeAssertPredicate error = errors.New("predicate cannot be type asserted to a known function type")
|
|
|
|
// ActivityStreamsInterface represents any ActivityStream value code-generated by
|
|
// go-fed or compatible with the generated interfaces.
|
|
type ActivityStreamsInterface interface {
|
|
// GetName returns the ActiivtyStreams value's type.
|
|
GetName() string
|
|
}
|
|
|
|
// Resolver represents any TypeResolver.
|
|
type Resolver interface {
|
|
// Resolve will attempt to resolve an untyped ActivityStreams value into a
|
|
// Go concrete type.
|
|
Resolve(ctx context.Context, o ActivityStreamsInterface) error
|
|
}
|
|
|
|
// IsUnmatchedErr is true when the error indicates that a Resolver was
|
|
// unsuccessful due to the ActivityStreams value not matching its callbacks or
|
|
// predicates.
|
|
func IsUnmatchedErr(err error) bool {
|
|
return err == ErrPredicateUnmatched || err == ErrUnhandledType || err == ErrNoCallbackMatch
|
|
}
|