+ public void addRelationTypeWriter(Resource relation, Resource type, Class<? extends XMLElementWriter> writer) {\r
+ Map<Resource,Class<? extends XMLElementWriter>> typeWriters = relationTypeWriters.get(relation);\r
+ if (typeWriters == null) {\r
+ typeWriters = new HashMap<>();\r
+ relationTypeWriters.put(relation, typeWriters);\r
+ }\r
+ typeWriters.put(type, writer);\r
+ }\r
+ \r
+ \r