From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 5 Oct 2021 22:00:48 +0000 (+0300)
Subject: Add support for storing the loaded object in DynamicObjectLoader
X-Git-Url: http://git.tdb.fi/?p=libs%2Fdatafile.git;a=commitdiff_plain;h=616f6fa9d983da10bf323c45d7a44d94c5a09f1e

Add support for storing the loaded object in DynamicObjectLoader

This allows the object to be stored in the collection using its actual
type rather than the base class.
---

diff --git a/source/dynamicobjectloader.h b/source/dynamicobjectloader.h
index c83d914..b5830b8 100644
--- a/source/dynamicobjectloader.h
+++ b/source/dynamicobjectloader.h
@@ -2,6 +2,7 @@
 #define MSP_DATAFILE_DYNAMICOBJECTLOADER_H_
 
 #include <msp/core/typeregistry.h>
+#include "collection.h"
 #include "except.h"
 #include "loader.h"
 
@@ -33,6 +34,7 @@ protected:
 private:
 	T *object;
 	Loader *obj_loader;
+	std::function<void(Collection &, const std::string &, T *)> store_func;
 
 	static ActionMap shared_actions;
 
@@ -41,10 +43,14 @@ protected:
 public:
 	~DynamicObjectLoader() { delete object; delete obj_loader; }
 
-	T *get_object() { T *o = object; object = 0; return o; }
 private:
 	virtual void init_actions();
 
+public:
+	T *get_object() { T *o = object; object = 0; return o; }
+	void store_object(Collection &, const std::string &);
+
+private:
 	void type(const Symbol &);
 
 	template<typename U>
@@ -76,6 +82,16 @@ void DynamicObjectLoader<T, C>::init_actions()
 	add("type", &DynamicObjectLoader::type);
 }
 
+template<typename T, typename C>
+void DynamicObjectLoader<T, C>::store_object(Collection &c, const std::string &name)
+{
+	if(!store_func)
+		throw std::logic_error("no store function");
+
+	store_func(c, name, object);
+	object = 0;
+}
+
 template<typename T, typename C>
 void DynamicObjectLoader<T, C>::type(const Symbol &t)
 {
@@ -110,6 +126,7 @@ void DynamicObjectLoader<T, C>::CreateObject<U>::operator()(const std::string &,
 	ldr.object = obj;
 	ldr.obj_loader = ldr.create_object_loader<U>(*obj);
 	ldr.add_auxiliary_loader(*ldr.obj_loader);
+	ldr.store_func = [&ldr](Collection &c, const std::string &n, T *o){ c.add(n, static_cast<U *>(o)); };
 }
 
 } // namespace DataFile