From 74728d50be43156b1726c732b89b36392f697ef4 Mon Sep 17 00:00:00 2001
From: zoujh <zoujh@ihep.ac.cn>
Date: Tue, 26 Oct 2021 19:21:19 +0800
Subject: [PATCH] create a DLElement object from a json string

---
 SniperKernel/SniperKernel/Sniper.h |  3 +++
 SniperKernel/src/Sniper.cc         | 10 ++++++++++
 SniperPython/src/SniperExp.cc      |  1 +
 3 files changed, 14 insertions(+)

diff --git a/SniperKernel/SniperKernel/Sniper.h b/SniperKernel/SniperKernel/Sniper.h
index 1082d15..6cdded2 100644
--- a/SniperKernel/SniperKernel/Sniper.h
+++ b/SniperKernel/SniperKernel/Sniper.h
@@ -24,6 +24,9 @@ class DLElement;
 
 namespace Sniper
 {
+    //create a DLElement from a json string
+    DLElement *create(const std::string &json_str);
+    //eval a SNiPER job from a json config file
     DLElement *eval(const char *fname);
 
     void setLogLevel(int level);
diff --git a/SniperKernel/src/Sniper.cc b/SniperKernel/src/Sniper.cc
index beae33a..cee7957 100644
--- a/SniperKernel/src/Sniper.cc
+++ b/SniperKernel/src/Sniper.cc
@@ -39,6 +39,16 @@ namespace Sniper
     std::vector<std::string> LoadDlls;
 }
 
+DLElement *Sniper::create(const std::string &json_str)
+{
+    auto json = SniperJSON::loads(json_str);
+
+    DLElement *pobj = DLEFactory::instance().create(json["identifier"].get<std::string>());
+    pobj->eval(json);
+
+    return pobj;
+}
+
 DLElement *Sniper::eval(const char *fname)
 {
     std::ifstream ifs(fname);
diff --git a/SniperPython/src/SniperExp.cc b/SniperPython/src/SniperExp.cc
index 863be29..63790af 100644
--- a/SniperPython/src/SniperExp.cc
+++ b/SniperPython/src/SniperExp.cc
@@ -60,6 +60,7 @@ void export_Sniper_Sniper()
 {
     using namespace boost::python;
 
+    def("create", &Sniper::create, return_value_policy<reference_existing_object>());
     def("eval", &Sniper::eval, return_value_policy<reference_existing_object>());
     def("setLogLevel", SniperExp::setLogLevel);
     def("setColorful", SniperExp::setColorful);