45 lines
894 B
Go
45 lines
894 B
Go
package checker
|
|
|
|
// Set of type checkers
|
|
type Set struct {
|
|
types []Type
|
|
}
|
|
|
|
// New returns a new set of type checkers
|
|
func New() *Set {
|
|
return &Set{types: make([]Type, 0)}
|
|
}
|
|
|
|
// Add adds a new type checker
|
|
func (s *Set) Add(typeChecker Type) {
|
|
s.types = append(s.types, typeChecker)
|
|
}
|
|
|
|
// Run finds a type checker from the registry matching the type `typeName`
|
|
// and uses this checker to check the `value`. If no type checker matches
|
|
// the `type`, error is returned by default.
|
|
func (s *Set) Run(typeName string, value interface{}) error {
|
|
|
|
// find matching type (take first)
|
|
for _, typeChecker := range s.types {
|
|
if typeChecker == nil {
|
|
continue
|
|
}
|
|
|
|
// found
|
|
checkerFunc := typeChecker.Checker(typeName)
|
|
if checkerFunc == nil {
|
|
continue
|
|
}
|
|
|
|
// check value
|
|
if checkerFunc(value) {
|
|
return nil
|
|
} else {
|
|
return ErrDoesNotMatch
|
|
}
|
|
}
|
|
|
|
return ErrNoMatchingType
|
|
}
|