122 lines
3.1 KiB
Go
122 lines
3.1 KiB
Go
|
package toml
|
||
|
|
|
||
|
|
import "strings"
|
||
|
|
|
||
|
|
// MetaData allows access to meta information about TOML data that may not
|
||
|
|
// be inferrable via reflection. In particular, whether a key has been defined
|
||
|
|
// and the TOML type of a key.
|
||
|
|
type MetaData struct {
|
||
|
|
mapping map[string]interface{}
|
||
|
|
types map[string]tomlType
|
||
|
|
keys []Key
|
||
|
|
decoded map[string]bool
|
||
|
|
context Key // Used only during decoding.
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsDefined returns true if the key given exists in the TOML data. The key
|
||
|
|
// should be specified hierarchially. e.g.,
|
||
|
|
//
|
||
|
|
// // access the TOML key 'a.b.c'
|
||
|
|
// IsDefined("a", "b", "c")
|
||
|
|
//
|
||
|
|
// IsDefined will return false if an empty key given. Keys are case sensitive.
|
||
|
|
func (md *MetaData) IsDefined(key ...string) bool {
|
||
|
|
if len(key) == 0 {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
var hash map[string]interface{}
|
||
|
|
var ok bool
|
||
|
|
var hashOrVal interface{} = md.mapping
|
||
|
|
for _, k := range key {
|
||
|
|
if hash, ok = hashOrVal.(map[string]interface{}); !ok {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
if hashOrVal, ok = hash[k]; !ok {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
// Type returns a string representation of the type of the key specified.
|
||
|
|
//
|
||
|
|
// Type will return the empty string if given an empty key or a key that
|
||
|
|
// does not exist. Keys are case sensitive.
|
||
|
|
func (md *MetaData) Type(key ...string) string {
|
||
|
|
fullkey := strings.Join(key, ".")
|
||
|
|
if typ, ok := md.types[fullkey]; ok {
|
||
|
|
return typ.typeString()
|
||
|
|
}
|
||
|
|
return ""
|
||
|
|
}
|
||
|
|
|
||
|
|
// Key is the type of any TOML key, including key groups. Use (MetaData).Keys
|
||
|
|
// to get values of this type.
|
||
|
|
type Key []string
|
||
|
|
|
||
|
|
func (k Key) String() string {
|
||
|
|
return strings.Join(k, ".")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (k Key) maybeQuotedAll() string {
|
||
|
|
var ss []string
|
||
|
|
for i := range k {
|
||
|
|
ss = append(ss, k.maybeQuoted(i))
|
||
|
|
}
|
||
|
|
return strings.Join(ss, ".")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (k Key) maybeQuoted(i int) string {
|
||
|
|
quote := false
|
||
|
|
for _, c := range k[i] {
|
||
|
|
if !isBareKeyChar(c) {
|
||
|
|
quote = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if quote {
|
||
|
|
return "\"" + strings.Replace(k[i], "\"", "\\\"", -1) + "\""
|
||
|
|
}
|
||
|
|
return k[i]
|
||
|
|
}
|
||
|
|
|
||
|
|
func (k Key) add(piece string) Key {
|
||
|
|
newKey := make(Key, len(k)+1)
|
||
|
|
copy(newKey, k)
|
||
|
|
newKey[len(k)] = piece
|
||
|
|
return newKey
|
||
|
|
}
|
||
|
|
|
||
|
|
// Keys returns a slice of every key in the TOML data, including key groups.
|
||
|
|
// Each key is itself a slice, where the first element is the top of the
|
||
|
|
// hierarchy and the last is the most specific.
|
||
|
|
//
|
||
|
|
// The list will have the same order as the keys appeared in the TOML data.
|
||
|
|
//
|
||
|
|
// All keys returned are non-empty.
|
||
|
|
func (md *MetaData) Keys() []Key {
|
||
|
|
return md.keys
|
||
|
|
}
|
||
|
|
|
||
|
|
// Undecoded returns all keys that have not been decoded in the order in which
|
||
|
|
// they appear in the original TOML document.
|
||
|
|
//
|
||
|
|
// This includes keys that haven't been decoded because of a Primitive value.
|
||
|
|
// Once the Primitive value is decoded, the keys will be considered decoded.
|
||
|
|
//
|
||
|
|
// Also note that decoding into an empty interface will result in no decoding,
|
||
|
|
// and so no keys will be considered decoded.
|
||
|
|
//
|
||
|
|
// In this sense, the Undecoded keys correspond to keys in the TOML document
|
||
|
|
// that do not have a concrete type in your representation.
|
||
|
|
func (md *MetaData) Undecoded() []Key {
|
||
|
|
undecoded := make([]Key, 0, len(md.keys))
|
||
|
|
for _, key := range md.keys {
|
||
|
|
if !md.decoded[key.String()] {
|
||
|
|
undecoded = append(undecoded, key)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return undecoded
|
||
|
|
}
|