JSON Paths

Basic dot-delimited fragment resolution

#               - the root node

path = new JsonPath(parser.get_root());

assert (path.get_node("#") == parser.get_root());

"""
   {
      "foo":{
         "anArray":[
           {"prop":44}
         ],
         "another prop":{
             "baz":"A string"
         }
      }
   }

   fragment identifier    resolution
   -------------------    ----------
   #                      self, the root of the resource itself
   #foo                   the object referred to by the foo property
   #foo.another prop      the object referred to by the "another prop"
                          property of the object referred to by the
                          "foo" property
   #foo.another prop.baz  the string referred to by the value of "baz"
                          property of the "another prop" property of
                          the object referred to by the "foo" property
   #foo.anArray.0         the first object in the "anArray" array
"""

path.get_node("#foo.another prop") == Json.Object({ "baz" : "A string" });

path.get_node("#foo.another prop.baz") == Json.Node(typeof (string), "A string")); path.get_node("#foo.another prop.baz").type == typeof (string); path.get_string("#foo.another prop.baz") == "A string";

Globs

• Arrays:

"""
  [
    {
      "foo" : [ 1, 1, 2, 3, 5, 8, 13 ],
      "bar" : true
    },
    {
      "foo" : 3.14,
      "bar" : false
    }
  ]
"""

        #*.foo          [ [ 1, 1, 2, 3, 5, 8, 13 ], 3.14 ]
        #*.bar          [ true, false ]

• Objects:

"""
  {
    "foo" : {
      "isSet" : true,
      "size" : [ 256, 256 ],
      "depth" : 8
    },
    "bar" : {
      "isSet" : false
    }
    "baz" : {
      "isSet" : true,
      "size" : [ 512, 512 ],
      "depth" : 16
    }
  }
"""

        #*.isSet        [ true, false, true ]
        #*.size         [ [ 256, 256 ], null, [ 512, 512 ] ]

API

JsonPath *      json_path_new               (void);
void            json_path_set_root          (JsonPath *path, JsonNode *node);
JsonNode *      json_path_get_node          (JsonPath *path, const gchar *str, GError **error);

G_CONST_RETURN *json_path_get_string_value  (JsonPath *path, const gchar *str, GError **error);
gboolean        json_path_get_boolean_value (JsonPath *path, const gchar *str, GError **error);
gdouble         json_path_get_double_value  (JsonPath *path, const gchar *str, GError **error);
gint64          json_path_get_int_value     (JsonPath *path, const gchar *str, GError **error);
gboolean        json_path_get_null_value    (JsonPath *path, const gchar *str, GError **error);