main.cpp

#include <shogun/base/SGObject.h>
#include <shogun/base/class_list.h>
#define HAVE_JSON 1
#include <shogun/io/SerializableJsonFile.h>
#include <unistd.h>

using namespace shogun;
void test()
{
	std::string class_name("TwoStateModel");
	std::string file_template = "/tmp/" + class_name + ".XXXXXX";
	char* filename = mktemp(const_cast<char*>(file_template.c_str()));
	CSGObject* object = new_sgserializable(class_name.c_str(), PT_NOT_GENERIC);
	ASSERT(object != NULL);

	// save object to an ascii file
	CSerializableJsonFile *file=new CSerializableJsonFile(filename, 'w');
	object->save_serializable(file);
	file->close();
	SG_UNREF(file);

	// load parameter from an ascii file
	file=new CSerializableJsonFile(filename, 'r');
	CSGObject* deserializedObject = new_sgserializable(class_name.c_str(), PT_NOT_GENERIC);
	ASSERT(deserializedObject != NULL);
	deserializedObject->load_serializable(file);
	file->close();
	SG_UNREF(file);

	// check whether they are equal, up to accuracy since json is lossy
	float64_t accuracy=1e-6;
	ASSERT(object->equals(deserializedObject, accuracy));

	SG_UNREF(object)
	SG_UNREF(deserializedObject);
}


int main()
{
	init_shogun_with_defaults();

	sg_io->set_loglevel(MSG_DEBUG);

	test();

	exit_shogun();
}

output

[DEBUG] START SAVING CSGObject 'TwoStateModel'
[DEBUG] Saving parameter 'version_parameter' of type 'int32'
[DEBUG] Saving parameter 'm_num_states' of type 'int32'
[DEBUG] Saving parameter 'm_num_tranmission_params' of type 'int32'
[DEBUG] Saving parameter 'm_state_loss_mat' of type 'SGMatrix<float64>'
[DEBUG] Saving parameter 'm_p' of type 'SGVector<float64>'
[DEBUG] Saving parameter 'm_q' of type 'SGVector<float64>'
[DEBUG] DONE SAVING CSGObject 'TwoStateModel' (0xbbf67e0)
[ERROR] In file /home/heiko/Desktop/shogun/shogun/src/shogun/io/SerializableJsonFile.cpp line 104: Could not open file `/tmp/TwoStateModel.HwUZVH' for reading!
terminate called after throwing an instance of 'shogun::ShogunException'

serialized file

heiko@heiko-ThinkPad-T420:~/Desktop/shogun/workspace/shogun-test$ cat /tmp/TwoStateModel.HwUZVH
{"filetype":"_SHOGUN_SERIALIZABLE_JSON_FILE_V_00_","version_parameter":{"type":"int32","data":1},"m_num_states":{"type":"int32","data":4},"m_num_tranmission_params":{"type":"int32","data":4},"m_state_loss_mat":{"type":"SGMatrix<float64>","data":[[0.000000,0.000000,0.000000,1.000000],[0.000000,0.000000,0.000000,1.000000],[0.000000,0.000000,0.000000,1.000000],[1.000000,1.000000,1.000000,0.000000]]},"m_p":{"type":"SGVector<float64>","data":[0.000000,-inf,-inf,-inf]},"m_q":{"type":"SGVector<float64>","data":[-inf,0.000000,-inf,-inf]}}