Serialization work on Machina.

git-svn-id: http://svn.drobilla.net/lad/raul@306 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 8 insertions, 1 deletions

diff --git a/raul/RDFWriter.h b/raul/RDFWriter.h
index fbd81a5..9a5d5b3 100644
--- a/raul/RDFWriter.h
+++ b/raul/RDFWriter.h
@@ -29,13 +29,16 @@ namespace Raul {
 
 class RdfId {
 public:
-	enum Type { ANONYMOUS, RESOURCE };
+	enum Type { NULL_ID, ANONYMOUS, RESOURCE };
 
 	RdfId(Type t, const std::string& s) : _type(t), _string(s) {}
+	RdfId() : _type(NULL_ID) {}
 
 	Type               type() const      { return _type; }
 	const std::string& to_string() const { return _string; }
 
+	operator bool() { return (_type != NULL_ID); }
+
 private:
 	Type        _type;
 	std::string _string; ///< URI or blank node ID, depending on _type
@@ -53,6 +56,8 @@ public:
 	void start_to_string()                              throw (std::logic_error);
 	std::string finish()                                throw (std::logic_error);
 	
+	RdfId blank_id();
+	
 	bool serialization_in_progress() { return (_serializer != NULL); }
 
 	void write(const RdfId& subject,
@@ -69,6 +74,8 @@ private:
 	raptor_serializer* _serializer;
 	unsigned char*     _string_output;
 	Namespaces         _prefixes;
+
+	size_t _next_blank_id;
 };