Added message unmarshalling method

unmarshalJSON.go

+package query
+
+import (
+	"encoding/json"
+
+	"git.science.uu.nl/datastrophe/query-conversion/entity"
+)
+
+/*
+UnmarshalJSON takes an incoming message and unmarshals it
+	msg: *[]byte, the incoming message
+	Returns: *entity.IncomingQueryJSON, the unmarshalled message and a possible error
+*/
+func UnmarshalJSON(msg *[]byte) (*entity.IncomingQueryJSON, error) {
+	var JSONQuery entity.IncomingQueryJSON
+	err := json.Unmarshal(*msg, &JSONQuery)
+	return &JSONQuery, err
+}