uriaash commented on a change in pull request #87:
URL: https://github.com/apache/incubator-age/pull/87#discussion_r680365752
##########
File path: drivers/golang/models.go
##########
@@ -0,0 +1,269 @@
+package main
+
+import (
+ "bytes"
+ "fmt"
+ "math/big"
+ "reflect"
+)
+
+// GTYPE representing entity types for AGE result data : Vertex, Edge, Path
and SimpleEntity
+type GTYPE uint8
+
+const (
+ G_OTHER GTYPE = 1 + iota
+ G_VERTEX
+ G_EDGE
+ G_PATH
+ G_MAP_PATH
+ G_STR
+ G_INT
+ G_INTBIG
+ G_FLOAT
+ G_BOOL
+ G_MAP
+ G_ARR
+)
+
+var _TpV = reflect.TypeOf(&Vertex{})
+var _TpE = reflect.TypeOf(&Edge{})
+var _TpP = reflect.TypeOf(&Path{})
+var _TpMP = reflect.TypeOf(&MapPath{})
+var _TpStr = reflect.TypeOf(string(""))
+var _TpInt = reflect.TypeOf(int(0))
+var _TpIntBig = reflect.TypeOf(big.NewInt(0))
+var _TpFloat = reflect.TypeOf(float64(0))
+var _TpBool = reflect.TypeOf(bool(false))
+var _TpMap = reflect.TypeOf(map[string]interface{}{})
+var _TpArr = reflect.TypeOf([]interface{}{})
+
+// Entity object interface for parsed AGE result data : Vertex, Edge, Path and
SimpleEntity
+type Entity interface {
+ GType() GTYPE
+ String() string
+}
+
+func IsEntity(v interface{}) bool {
+ _, ok := v.(Entity)
+ return ok
+}
+
+type SimpleEntity struct {
+ Entity
+ typ GTYPE
+ value interface{}
+}
+
+func NewSimpleEntity(value interface{}) *SimpleEntity {
+ switch value.(type) {
+ case string:
+ return &SimpleEntity{typ: G_STR, value: value}
+ case int:
+ return &SimpleEntity{typ: G_INT, value: value}
+ case *big.Int:
+ return &SimpleEntity{typ: G_INTBIG, value: value}
+ case float64:
+ return &SimpleEntity{typ: G_FLOAT, value: value}
+ case bool:
+ return &SimpleEntity{typ: G_BOOL, value: value}
+ case map[string]interface{}:
+ return &SimpleEntity{typ: G_MAP, value: value}
+ case []interface{}:
+ return &SimpleEntity{typ: G_ARR, value: value}
+ default:
+ return &SimpleEntity{typ: G_OTHER, value: value}
+ }
+}
+
+func (e *SimpleEntity) GType() GTYPE {
+ return e.typ
+}
+
+func (e *SimpleEntity) Value() interface{} {
+ return e.value
+}
+
+func (e *SimpleEntity) String() string {
+ return fmt.Sprintf("%v", e.value)
+}
+
+func (e *SimpleEntity) AsStr() string {
+ return e.value.(string)
+}
+
+func (e *SimpleEntity) AsInt() int {
+ return e.value.(int)
+}
+
+func (e *SimpleEntity) AsInt64() int64 {
+ return e.value.(int64)
+}
+
+func (e *SimpleEntity) AsFloat() float64 {
+ return e.value.(float64)
+}
+
+func (e *SimpleEntity) AsBool() bool {
+ return e.value.(bool)
+}
+
+func (e *SimpleEntity) AsMap() map[string]interface{} {
+ return e.value.(map[string]interface{})
+}
+
+func (e *SimpleEntity) AsArr() []interface{} {
+ return e.value.([]interface{})
+}
+
+type LabeledEntity struct {
+ Entity
+ id int64
+ label string
+ props map[string]interface{}
Review comment:
The `id`, `label`, and `props` should probably be public and changed to
`Id`, `Label`, and `Props`.
Otherwise, you won't be able to use them as described in the README file
(see usage example section).
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