Move Trie to util package

pkg/genericapiserver/openapi/util.go

@@ -59,54 +59,3 @@ func mapKeyFromParam(param *restful.Parameter) interface{} {
 		Kind: param.Data().Kind,
 	}
 }
-
-// A simple trie implementation with Add an HasPrefix methods only.
-type trie struct {
-	children map[byte]*trie
-	wordTail bool
-}
-
-func createTrie(list []string) trie {
-	ret := trie{
-		children: make(map[byte]*trie),
-		wordTail: false,
-	}
-	for _, v := range list {
-		ret.Add(v)
-	}
-	return ret
-}
-
-func (t *trie) Add(v string) {
-	root := t
-	for _, b := range []byte(v) {
-		child, exists := root.children[b]
-		if !exists {
-			child = &trie{
-				children: make(map[byte]*trie),
-				wordTail: false,
-			}
-			root.children[b] = child
-		}
-		root = child
-	}
-	root.wordTail = true
-}
-
-func (t *trie) HasPrefix(v string) bool {
-	root := t
-	if root.wordTail {
-		return true
-	}
-	for _, b := range []byte(v) {
-		child, exists := root.children[b]
-		if !exists {
-			return false
-		}
-		if child.wordTail {
-			return true
-		}
-		root = child
-	}
-	return false
-}