Handle json.Number (#14)

jnode.go

@@ -177,7 +177,7 @@ func (n *Node) GetType() NodeType {
 	case string:
 		return Text
 	case int, int8, int16, int32, int64, float32, float64,
-		uint, uint8, uint16, uint32, uint64:
+		uint, uint8, uint16, uint32, uint64, json.Number:
 		return Number
 	case bool:
 		return Bool
@@ -214,6 +214,11 @@ func (n *Node) IsNull() bool {
 	return n == nil || n.value == nil
 }
 
+// IsNumber returns true fi the Node is a number
+func (n *Node) IsNumber() bool {
+	return n.GetType() == Number
+}
+
 // Unwrap returns the generic value from a Node
 func (n *Node) Unwrap() interface{} {
 	switch n.GetType() {
@@ -281,6 +286,11 @@ func (n *Node) AsInt() int {
 		return int(v)
 	case float64:
 		return int(v)
+	case json.Number:
+		if i, err := v.Int64(); err == nil {
+			return int(i)
+		}
+		return 0
 	default:
 		return 0
 	}
@@ -325,6 +335,11 @@ func (n *Node) AsFloat() float64 {
 		return float64(v)
 	case float64:
 		return v
+	case json.Number:
+		if f, err := v.Float64(); err == nil {
+			return f
+		}
+		return 0
 	default:
 		return 0
 	}

jnode_test.go

@@ -17,6 +17,7 @@ package jnode
 import (
 	"bytes"
 	"encoding/json"
+	"strings"
 	"testing"
 )
 
@@ -369,3 +370,22 @@ func TestRemove(t *testing.T) {
 		t.Error(n)
 	}
 }
+
+func TestJSONNumber(t *testing.T) {
+	d := json.NewDecoder(strings.NewReader(`{"i":123456789,"f":3.141592,"s":"hello"}`))
+	d.UseNumber()
+	var m map[string]interface{}
+	if err := d.Decode(&m); err != nil {
+		t.Fatal(err)
+	}
+	if i, _ := m["i"].(json.Number).Int64(); i != int64(123456789) {
+		t.Error(i)
+	}
+	n := FromMap(m)
+	if i := n.Path("i"); i.AsInt() != 123456789 {
+		t.Error(i)
+	}
+	if f := n.Path("f"); f.AsFloat() != 3.141592 {
+		t.Error(f)
+	}
+}