Listing built-in functionality: Raptor RDF Syntax Library Manual

+Listing built-in functionality

+Raptor can be configured and compiled with support for different +lists of parsers and serializers. The list built into the +library can be found by means of +description functions. These take as input an +int counter and return descriptions of the object +at that offset in the list. The return value is a pointer to a +shared, read-only description of the object, or NULL if the counter +has gone too far into the list. +

Listing Functionality with Descriptions

+ ++++ + + + + + + + + + + + + + + +

Get descriptions of the parser syntaxes

+  const raptor_syntax_description*
+  raptor_world_get_parser_description(raptor_world* world,
+                                      unsigned int counter);
+

Get descriptions of the serializer syntaxes

+  const raptor_syntax_description*
+  raptor_world_get_serializer_description(raptor_world* world,
+                                          unsigned int counter);
+

Get descriptions of options

+  raptor_option_description*
+  raptor_world_get_option_description(raptor_world* world,
+                                      const raptor_domain domain,
+                                      const raptor_option option);
+

+Call with the appropriate domains for the class such as +RAPTOR_DOMAIN_PARSER, +RAPTOR_DOMAIN_SERIALIZER + etc. See the +raptor_domain +description for the full list. +

These functions can be called directly after creating a +raptor world object with +raptor_new_world(). +This is one way to find a parser (name) by it's MIME Type, the other +is to use the mime_type parameter of the +raptor_new_parser_for_content().

Example 1. List all parser options using option description

+  unsigned int i;
+  for(i = 0; i < raptor_option_get_count(); i++) {
+    raptor_option_description* od;
+
+    od = raptor_world_get_option_description(world, RAPTOR_DOMAIN_PARSER, i);
+
+    if(od) {
+      /* do something with od fields such as od->name, od->label */
+    }
+  }
+

There are more examples of this usage in the source for the +rapper utility in util/rapper.c. +

+
+