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832 B

package tmap
import "github.com/gotd/td/bin"
// Constructor maps type id to type constructor.
type Constructor struct {
types map[uint32]func() bin.Object
}
func (c *Constructor) add(mapping map[uint32]func() bin.Object) {
// Probably it is good place to catch collisions, but
// ignoring for now.
for k, v := range mapping {
c.types[k] = v
}
}
// New instantiates new value for type id or returns nil.
func (c *Constructor) New(id uint32) bin.Object {
if c == nil || len(c.types) == 0 {
return nil
}
fn := c.types[id]
if fn == nil {
return nil
}
return fn()
}
// NewConstructor merges mappings into Constructor.
func NewConstructor(mappings ...map[uint32]func() bin.Object) *Constructor {
c := &Constructor{
types: map[uint32]func() bin.Object{},
}
for _, m := range mappings {
c.add(m)
}
return c
}