add create() in class_list

src/interfaces/modular/SGBase.i

@@ -107,6 +107,7 @@ public void readExternal(java.io.ObjectInput in) throws java.io.IOException, jav
  #include <shogun/base/Version.h>
  #include <shogun/base/Parallel.h>
  #include <shogun/base/SGObject.h>
+ #include <shogun/base/class_list.h>
 
  extern void sg_global_print_message(FILE* target, const char* str);
  extern void sg_global_print_warning(FILE* target, const char* str);
@@ -325,6 +326,7 @@ namespace std {
 %include <shogun/io/SGIO.h>
 %include <shogun/base/Version.h>
 %include <shogun/base/Parallel.h>
+%include <shogun/base/class_list.h>
 
 #ifdef SWIGPYTHON
 namespace shogun
@@ -508,3 +510,7 @@ copy_reg._reconstructor=_sg_reconstructor
 
 
 #endif /* SWIGPYTHON  */
+
+using namespace shogun;
+
+%template(createKernel) create<CKernel>;

src/shogun/base/class_list.h

@@ -12,7 +12,7 @@
 #define __SG_CLASS_LIST_H__
 
 #include <shogun/lib/config.h>
-
+#include <shogun/base/some.h>
 #include <shogun/lib/DataType.h>
 
 namespace shogun {
@@ -24,6 +24,20 @@ namespace shogun {
 	 */
 	CSGObject* new_sgserializable(const char* sgserializable_name,
 										EPrimitiveType generic);
+
+    /** Creates an instance of a class identified by input name
+     * that is wrapped with a shared pointer like structure @ref Some
+     *
+     * @param name name of class
+     * @param type type for template class
+     * @return Some object that holds created instance of @ref T
+     */
+    template<class T>
+    Some<T> create(const char* name,
+        EPrimitiveType type=PT_NOT_GENERIC)
+    {
+        return Some<T>(dynamic_cast<T*>(new_sgserializable(name, type)));
+    }
 }
 
 #endif /* __SG_CLASS_LIST_H__  */

tests/unit/base/class_list_unittest.cc

@@ -0,0 +1,25 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Written (W) 2016 Sanuj Sharma
+ */
+
+#include <shogun/base/SGObject.h>
+#include <shogun/base/class_list.h>
+#include <shogun/kernel/GaussianKernel.h>
+#include <gtest/gtest.h>
+
+using namespace shogun;
+
+TEST(class_list, create_gaussian_kernel)
+{
+    const char* class_name = "GaussianKernel";
+    auto gk = create<CKernel>(class_name);
+    auto another_gk = some<CGaussianKernel>();
+
+    EXPECT_EQ(strcmp(gk->get_name(), class_name), 0);
+    EXPECT_TRUE(gk->equals(another_gk));
+}