Serializer

Serializer — RDF serializers - from RDF triples to a syntax

Synopsis

typedef             raptor_serializer;
raptor_serializer*  raptor_new_serializer               (const char *name);
void                raptor_free_serializer              (raptor_serializer *rdf_serializer);
int                 raptor_serialize_start              (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         raptor_iostream *iostream);
int                 raptor_serialize_start_to_iostream  (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         raptor_iostream *iostream);
int                 raptor_serialize_start_to_filename  (raptor_serializer *rdf_serializer,
                                                         const char *filename);
int                 raptor_serialize_start_to_string    (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         void **string_p,
                                                         size_t *length_p);
int                 raptor_serialize_start_to_file_handle
                                                        (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         FILE *fh);
int                 raptor_serialize_set_namespace      (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         unsigned char *prefix);
int                 raptor_serialize_set_namespace_from_namespace
                                                        (raptor_serializer *rdf_serializer,
                                                         raptor_namespace *nspace);
int                 raptor_serialize_statement          (raptor_serializer *rdf_serializer,
                                                         const raptor_statement *statement);
int                 raptor_serialize_end                (raptor_serializer *rdf_serializer);
raptor_iostream*    raptor_serializer_get_iostream      (raptor_serializer *serializer);
void                raptor_serializer_set_error_handler (raptor_serializer *serializer,
                                                         void *user_data,
                                                         raptor_message_handler handler);
void                raptor_serializer_set_warning_handler
                                                        (raptor_serializer *serializer,
                                                         void *user_data,
                                                         raptor_message_handler handler);
raptor_locator*     raptor_serializer_get_locator       (raptor_serializer *rdf_serializer);
int                 raptor_serializer_features_enumerate
                                                        (const raptor_feature feature,
                                                         const char **name,
                                                         raptor_uri **uri,
                                                         const char **label);
int                 raptor_serializer_set_feature       (raptor_serializer *serializer,
                                                         raptor_feature feature,
                                                         int value);
int                 raptor_serializer_set_feature_string
                                                        (raptor_serializer *serializer,
                                                         raptor_feature feature,
                                                         unsigned char *value);
int                 raptor_serializer_get_feature       (raptor_serializer *serializer,
                                                         raptor_feature feature);
const unsigned char * raptor_serializer_get_feature_string
                                                        (raptor_serializer *serializer,
                                                         raptor_feature feature);
raptor_world*       raptor_serializer_get_world         (raptor_serializer *rdf_serializer);

Description

The serializing class that allows creating a serializer for writing a particular syntax to an output string, file, file handle or user function (via raptor_iostream).

There are also methods to deal with handling errors, warnings and returned triples as well as setting options (features) that can adjust how serializing is performed.

Details

raptor_serializer

raptor_serializer* raptor_serializer;

Raptor Serializer class

raptor_new_serializer ()

raptor_serializer*  raptor_new_serializer               (const char *name);

Constructor - create a new raptor_serializer object.

raptor_init() MUST have been called before calling this function. Use raptor_new_serializer_v2() if using raptor_world APIs.

name :

 the serializer name

Returns :

 a new raptor_serializer object or NULL on failure

raptor_free_serializer ()

void                raptor_free_serializer              (raptor_serializer *rdf_serializer);

Destructor - destroy a raptor_serializer object.

rdf_serializer :

 raptor_serializer object

raptor_serialize_start ()

int                 raptor_serialize_start              (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         raptor_iostream *iostream);

Start serialization with given base URI

The passed in iostream becomes owned by the serializer and will be destroyed when the serializing is complete. Compare to raptor_serialize_start_to_iostream(). This function will be deprecated for raptor_serialize_start_to_iostream() in future.

rdf_serializer :

 the raptor_serializer

uri :

 base URI or NULL if no base URI is required

iostream :

 raptor_iostream to write serialization to

Returns :

 non-0 on failure.

raptor_serialize_start_to_iostream ()

int                 raptor_serialize_start_to_iostream  (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         raptor_iostream *iostream);

Start serialization to an iostream with given base URI

The passed in iostream does not becomes owned by the serializer and can be used by the caller after serializing is done. It must be destroyed by the caller. Compare to raptor_serialize_start() which will be deprecated in future.

rdf_serializer :

 the raptor_serializer

uri :

 base URI or NULL if no base URI is required

iostream :

 raptor_iostream to write serialization to

Returns :

 non-0 on failure.

raptor_serialize_start_to_filename ()

int                 raptor_serialize_start_to_filename  (raptor_serializer *rdf_serializer,
                                                         const char *filename);

Start serializing to a filename.

rdf_serializer :

 the raptor_serializer

filename :

 filename to serialize to

Returns :

 non-0 on failure.

raptor_serialize_start_to_string ()

int                 raptor_serialize_start_to_string    (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         void **string_p,
                                                         size_t *length_p);

Start serializing to a string.

rdf_serializer :

 the raptor_serializer

uri :

 base URI or NULL if no base URI is required

string_p :

 pointer to location to hold string

length_p :

 pointer to location to hold length of string (or NULL)

Returns :

 non-0 on failure.

raptor_serialize_start_to_file_handle ()

int                 raptor_serialize_start_to_file_handle
                                                        (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         FILE *fh);

Start serializing to a FILE*.

NOTE: This does not fclose the handle when it is finished.

rdf_serializer :

 the raptor_serializer

uri :

 base URI or NULL if no base URI is required

fh :

 FILE* to serialize to

Returns :

 non-0 on failure.

raptor_serialize_set_namespace ()

int                 raptor_serialize_set_namespace      (raptor_serializer *rdf_serializer,
                                                         raptor_uri *uri,
                                                         unsigned char *prefix);

set a namespace uri/prefix mapping for serializing.

rdf_serializer :

 the raptor_serializer

uri :

 raptor_uri of namespace or NULL

prefix :

 prefix to use or NULL

Returns :

 non-0 on failure.

raptor_serialize_set_namespace_from_namespace ()

int                 raptor_serialize_set_namespace_from_namespace
                                                        (raptor_serializer *rdf_serializer,
                                                         raptor_namespace *nspace);

Set a namespace uri/prefix mapping for serializing from an existing namespace.

rdf_serializer :

 the raptor_serializer

nspace :

 raptor_namespace to set

Returns :

 non-0 on failure.

raptor_serialize_statement ()

int                 raptor_serialize_statement          (raptor_serializer *rdf_serializer,
                                                         const raptor_statement *statement);

Serialize a statement.

rdf_serializer :

 the raptor_serializer

statement :

 raptor_statement to serialize to a syntax

Returns :

 non-0 on failure.

raptor_serialize_end ()

int                 raptor_serialize_end                (raptor_serializer *rdf_serializer);

End a serialization.

rdf_serializer :

 the raptor_serializer

Returns :

 non-0 on failure.

raptor_serializer_get_iostream ()

raptor_iostream*    raptor_serializer_get_iostream      (raptor_serializer *serializer);

Get the current serializer iostream.

serializer :

 raptor_serializer object

Returns :

 the serializer's current iostream or NULL if

raptor_serializer_set_error_handler ()

void                raptor_serializer_set_error_handler (raptor_serializer *serializer,
                                                         void *user_data,
                                                         raptor_message_handler handler);

Set the serializer error handling function.

The function will receive callbacks when the serializer fails.

serializer :

 the serializer

user_data :

 user data to pass to function

handler :

 pointer to the function

raptor_serializer_set_warning_handler ()

void                raptor_serializer_set_warning_handler
                                                        (raptor_serializer *serializer,
                                                         void *user_data,
                                                         raptor_message_handler handler);

Set the serializer warning handling function.

The function will receive callbacks when the serializer fails.

serializer :

 the serializer

user_data :

 user data to pass to function

handler :

 pointer to the function

raptor_serializer_get_locator ()

raptor_locator*     raptor_serializer_get_locator       (raptor_serializer *rdf_serializer);

Get the serializer raptor locator object.

rdf_serializer :

 raptor serializer

Returns :

 raptor locator

raptor_serializer_features_enumerate ()

int                 raptor_serializer_features_enumerate
                                                        (const raptor_feature feature,
                                                         const char **name,
                                                         raptor_uri **uri,
                                                         const char **label);

Get list of serializer features.

If uri is not NULL, a pointer toa new raptor_uri is returned that must be freed by the caller with raptor_free_uri().

raptor_init() MUST have been called before calling this function. Use raptor_serializer_features_enumerate_v2() if using raptor_world APIs.

feature :

 feature enumeration (0+)

name :

 pointer to store feature short name (or NULL)

uri :

 pointer to store feature URI (or NULL)

label :

 pointer to feature label (or NULL)

Returns :

 0 on success, <0 on failure, >0 if feature is unknown

raptor_serializer_set_feature ()

int                 raptor_serializer_set_feature       (raptor_serializer *serializer,
                                                         raptor_feature feature,
                                                         int value);

Set serializer features with integer values.

The allowed features are available via raptor_features_enumerate().

serializer :

 raptor_serializer serializer object

feature :

 feature to set from enumerated raptor_feature values

value :

 integer feature value (0 or larger)

Returns :

 non 0 on failure or if the feature is unknown

raptor_serializer_set_feature_string ()

int                 raptor_serializer_set_feature_string
                                                        (raptor_serializer *serializer,
                                                         raptor_feature feature,
                                                         unsigned char *value);

Set serializer features with string values.

The allowed features are available via raptor_serializer_features_enumerate(). If the feature type is integer, the value is interpreted as an integer.

serializer :

 raptor_serializer serializer object

feature :

 feature to set from enumerated raptor_feature values

value :

 feature value

Returns :

 non 0 on failure or if the feature is unknown

raptor_serializer_get_feature ()

int                 raptor_serializer_get_feature       (raptor_serializer *serializer,
                                                         raptor_feature feature);

Get various serializer features.

The allowed features are available via raptor_features_enumerate().

Note: no feature value is negative

serializer :

 raptor_serializer serializer object

feature :

 feature to get value

Returns :

 feature value or < 0 for an illegal feature

raptor_serializer_get_feature_string ()

const unsigned char * raptor_serializer_get_feature_string
                                                        (raptor_serializer *serializer,
                                                         raptor_feature feature);

Get serializer features with string values.

The allowed features are available via raptor_features_enumerate().

serializer :

 raptor_serializer serializer object

feature :

 feature to get value

Returns :

 feature value or NULL for an illegal feature or no value

raptor_serializer_get_world ()

raptor_world*       raptor_serializer_get_world         (raptor_serializer *rdf_serializer);

Get the raptor_world object associated with a serializer.

rdf_serializer :

 raptor serializer

Returns :

 raptor_world* pointer
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