Add support for map of int64 and map of int

cast.go

@@ -122,6 +122,18 @@ func ToStringMapBool(i interface{}) map[string]bool {
 	return v
 }
 
+// ToStringMapInt casts an interface to a map[string]int type.
+func ToStringMapInt(i interface{}) map[string]int {
+	v, _ := ToStringMapIntE(i)
+	return v
+}
+
+// ToStringMapInt64 casts an interface to a map[string]int64 type.
+func ToStringMapInt64(i interface{}) map[string]int64 {
+	v, _ := ToStringMapInt64E(i)
+	return v
+}
+
 // ToStringMap casts an interface to a map[string]interface{} type.
 func ToStringMap(i interface{}) map[string]interface{} {
 	v, _ := ToStringMapE(i)

cast_test.go

@@ -821,6 +821,83 @@ func TestToStringMapBoolE(t *testing.T) {
 	}
 }
 
+func TestToStringMapIntE(t *testing.T) {
+	tests := []struct {
+		input  interface{}
+		expect map[string]int
+		iserr  bool
+	}{
+		{map[interface{}]interface{}{"v1": 1, "v2": 222}, map[string]int{"v1": 1, "v2": 222}, false},
+		{map[string]interface{}{"v1": 342, "v2": 5141}, map[string]int{"v1": 342, "v2": 5141}, false},
+		{map[string]int{"v1": 33, "v2": 88}, map[string]int{"v1": 33, "v2": 88}, false},
+		{map[string]int32{"v1": int32(33), "v2": int32(88)}, map[string]int{"v1": 33, "v2": 88}, false},
+		{map[string]uint16{"v1": uint16(33), "v2": uint16(88)}, map[string]int{"v1": 33, "v2": 88}, false},
+		{map[string]float64{"v1": float64(8.22), "v2": float64(43.32)}, map[string]int{"v1": 8, "v2": 43}, false},
+		{`{"v1": 67, "v2": 56}`, map[string]int{"v1": 67, "v2": 56}, false},
+
+		// errors
+		{nil, nil, true},
+		{testing.T{}, nil, true},
+		{"", nil, true},
+	}
+
+	for i, test := range tests {
+		errmsg := fmt.Sprintf("i = %d", i) // assert helper message
+
+		v, err := ToStringMapIntE(test.input)
+		if test.iserr {
+			assert.Error(t, err, errmsg)
+			continue
+		}
+
+		assert.NoError(t, err, errmsg)
+		assert.Equal(t, test.expect, v, errmsg)
+
+		// Non-E test
+		v = ToStringMapInt(test.input)
+		assert.Equal(t, test.expect, v, errmsg)
+	}
+}
+
+func TestToStringMapInt64E(t *testing.T) {
+	tests := []struct {
+		input  interface{}
+		expect map[string]int64
+		iserr  bool
+	}{
+		{map[interface{}]interface{}{"v1": int32(8), "v2": int32(888)}, map[string]int64{"v1": int64(8), "v2": int64(888)}, false},
+		{map[string]interface{}{"v1": int64(45), "v2": int64(67)}, map[string]int64{"v1": 45, "v2": 67}, false},
+		{map[string]int64{"v1": 33, "v2": 88}, map[string]int64{"v1": 33, "v2": 88}, false},
+		{map[string]int{"v1": 33, "v2": 88}, map[string]int64{"v1": 33, "v2": 88}, false},
+		{map[string]int32{"v1": int32(33), "v2": int32(88)}, map[string]int64{"v1": 33, "v2": 88}, false},
+		{map[string]uint16{"v1": uint16(33), "v2": uint16(88)}, map[string]int64{"v1": 33, "v2": 88}, false},
+		{map[string]float64{"v1": float64(8.22), "v2": float64(43.32)}, map[string]int64{"v1": 8, "v2": 43}, false},
+			{`{"v1": 67, "v2": 56}`, map[string]int64{"v1": 67, "v2": 56}, false},
+
+		// errors
+		{nil, nil, true},
+		{testing.T{}, nil, true},
+		{"", nil, true},
+	}
+
+	for i, test := range tests {
+		errmsg := fmt.Sprintf("i = %d", i) // assert helper message
+
+		v, err := ToStringMapInt64E(test.input)
+		if test.iserr {
+			assert.Error(t, err, errmsg)
+			continue
+		}
+
+		assert.NoError(t, err, errmsg)
+		assert.Equal(t, test.expect, v, errmsg)
+
+		// Non-E test
+		v = ToStringMapInt64(test.input)
+		assert.Equal(t, test.expect, v, errmsg)
+	}
+}
+
 func TestToStringMapStringE(t *testing.T) {
 	var stringMapString = map[string]string{"key 1": "value 1", "key 2": "value 2", "key 3": "value 3"}
 	var stringMapInterface = map[string]interface{}{"key 1": "value 1", "key 2": "value 2", "key 3": "value 3"}

caste.go

@@ -990,6 +990,87 @@ func ToStringMapE(i interface{}) (map[string]interface{}, error) {
 	}
 }
 
+// ToStringMapIntE casts an interface to a map[string]int{} type.
+func ToStringMapIntE(i interface{}) (map[string]int, error)  {
+	var m = map[string]int{}
+	if i == nil {
+		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
+	}
+
+	switch v := i.(type) {
+	case map[interface{}]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToInt(val)
+		}
+		return m, nil
+	case map[string]interface{}:
+		for k, val := range v {
+			m[k] = ToInt(val)
+		}
+		return m, nil
+	case map[string]int:
+		return v, nil
+	case string:
+		err := jsonStringToObject(v, &m)
+		return m, err
+	}
+
+	if reflect.TypeOf(i).Kind() != reflect.Map {
+		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
+	}
+
+	mVal := reflect.ValueOf(m)
+	v := reflect.ValueOf(i)
+	for _, keyVal := range v.MapKeys() {
+		val, err := ToIntE(v.MapIndex(keyVal).Interface())
+		if err != nil {
+			return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
+		}
+		mVal.SetMapIndex(keyVal, reflect.ValueOf(val))
+	}
+	return m, nil
+}
+
+// ToStringMapInt64E casts an interface to a map[string]int64{} type.
+func ToStringMapInt64E(i interface{}) (map[string]int64, error)  {
+	var m = map[string]int64{}
+	if i == nil {
+		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
+	}
+
+	switch v := i.(type) {
+	case map[interface{}]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToInt64(val)
+		}
+		return m, nil
+	case map[string]interface{}:
+		for k, val := range v {
+			m[k] = ToInt64(val)
+		}
+		return m, nil
+	case map[string]int64:
+		return v, nil
+	case string:
+		err := jsonStringToObject(v, &m)
+		return m, err
+	}
+
+	if reflect.TypeOf(i).Kind() != reflect.Map {
+		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
+	}
+	mVal := reflect.ValueOf(m)
+	v := reflect.ValueOf(i)
+	for _, keyVal := range v.MapKeys() {
+		val, err := ToInt64E(v.MapIndex(keyVal).Interface())
+		if err != nil {
+			return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
+		}
+		mVal.SetMapIndex(keyVal, reflect.ValueOf(val))
+	}
+	return m, nil
+}
+
 // ToSliceE casts an interface to a []interface{} type.
 func ToSliceE(i interface{}) ([]interface{}, error) {
 	var s []interface{}