Refactor: DomainTrie use generics

dns/policy.go

@@ -0,0 +1,30 @@
+package dns
+
+type Policy struct {
+	data []dnsClient
+}
+
+func (p *Policy) GetData() []dnsClient {
+	return p.data
+}
+
+func (p *Policy) Compare(p2 *Policy) int {
+	if p2 == nil {
+		return 1
+	}
+	l1 := len(p.data)
+	l2 := len(p2.data)
+	if l1 == l2 {
+		return 0
+	}
+	if l1 > l2 {
+		return 1
+	}
+	return -1
+}
+
+func NewPolicy(data []dnsClient) *Policy {
+	return &Policy{
+		data: data,
+	}
+}