A first prototype for the space of sequences

Former-commit-id: 07dc6ef044b5b6a6fb45dc2acb01dffe71a96195

pkg/obiutils/cast_interface.go

@@ -0,0 +1,54 @@
+package obiutils
+
+// CastableToInt checks if the given input can be casted to an integer.
+//
+// i: the value to check for castability.
+// bool: true if the value can be casted to an integer, false otherwise.
+func CastableToInt(i interface{}) bool {
+	switch i.(type) {
+	case int,
+		int8, int16, int32, int64,
+		float32, float64,
+		uint8, uint16, uint32, uint64:
+		return true
+	default:
+		return false
+	}
+}
+
+// InterfaceToBool converts an interface value to a boolean.
+//
+// It takes an interface{} as a parameter and returns a boolean value and an error.
+func InterfaceToBool(i interface{}) (val bool, err error) {
+
+	err = nil
+	val = false
+
+	switch t := i.(type) {
+	case int:
+		val = t != 0
+	case int8:
+		val = t != 0 // standardizes across systems
+	case int16:
+		val = t != 0 // standardizes across systems
+	case int32:
+		val = t != 0 // standardizes across systems
+	case int64:
+		val = t != 0 // standardizes across systems
+	case float32:
+		val = t != 0 // standardizes across systems
+	case float64:
+		val = t != 0 // standardizes across systems
+	case uint8:
+		val = t != 0 // standardizes across systems
+	case uint16:
+		val = t != 0 // standardizes across systems
+	case uint32:
+		val = t != 0 // standardizes across systems
+	case uint64:
+		val = t != 0 // standardizes across systems
+	default:
+		err = &NotABoolean{"value attribute cannot be casted to a boolean"}
+	}
+	return
+}