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/* -*- Mode: c; c-basic-offset: 2 -*-
*
* example2.c - Redland example code parsing RDF/XML from a string in memory and adding/checking/removing a statement
*
* $Id$
*
* Copyright (C) 2000-2008, David Beckett http://www.dajobe.org/
* Copyright (C) 2000-2004, University of Bristol, UK http://www.bristol.ac.uk/
*
* This package is Free Software and part of Redland http://librdf.org/
*
* It is licensed under the following three licenses as alternatives:
* 1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
* 2. GNU General Public License (GPL) V2 or any newer version
* 3. Apache License, V2.0 or any newer version
*
* You may not use this file except in compliance with at least one of
* the above three licenses.
*
* See LICENSE.html or LICENSE.txt at the top of this package for the
* complete terms and further detail along with the license texts for
* the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
*
*
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include <redland.h>
/* one prototype needed */
int main(int argc, char *argv[]);
static unsigned const char *rdfxml_content=(unsigned const char *)
"<?xml version=\"1.0\"?>\
<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"\
xmlns:dc=\"http://purl.org/dc/elements/1.1/\">\
<rdf:Description rdf:about=\"http://www.dajobe.org/\">\
<dc:title>Dave Beckett's Home Page</dc:title>\
<dc:creator>Dave Beckett</dc:creator>\
<dc:description>The generic home page of Dave Beckett.</dc:description>\
</rdf:Description> \
</rdf:RDF>\
";
int
main(int argc, char *argv[])
{
librdf_world* world;
librdf_storage* storage;
librdf_model* model;
librdf_parser* parser;
librdf_statement* statement;
librdf_uri* uri;
char *program=argv[0];
int rc=0;
raptor_world *raptor_world_ptr;
raptor_iostream* iostr;
world=librdf_new_world();
librdf_world_open(world);
raptor_world_ptr = librdf_world_get_raptor(world);
uri=librdf_new_uri(world, (const unsigned char*)"http://example.librdf.org/");
if(!uri) {
fprintf(stderr, "%s: Failed to create URI\n", program);
return(1);
}
storage=librdf_new_storage(world, "memory", "test", NULL);
if(!storage) {
fprintf(stderr, "%s: Failed to create new storage\n", program);
rc=1;
goto tidyworld;
}
model=librdf_new_model(world, storage, NULL);
if(!model) {
fprintf(stderr, "%s: Failed to create model\n", program);
rc=1;
goto tidystorage;
}
parser=librdf_new_parser(world, "rdfxml", NULL, NULL);
if(!parser) {
fprintf(stderr, "%s: Failed to create new parser 'rdfxml'\n", program);
rc=1;
goto tidystorage;
}
if(librdf_parser_parse_string_into_model(parser, rdfxml_content, uri, model)) {
fprintf(stderr, "%s: Failed to parse RDF into model\n", program);
librdf_free_uri(uri);
rc=1;
goto tidymodel;
}
librdf_free_parser(parser); parser=NULL;
librdf_free_uri(uri); uri=NULL;
statement=librdf_new_statement(world);
if(!statement) {
fprintf(stderr, "%s: Failed to parse RDF into model\n", program);
rc=1;
goto tidymodel;
}
librdf_statement_set_subject(statement,
librdf_new_node_from_uri_string(world, (const unsigned char*)"http://example.org/subject"));
librdf_statement_set_predicate(statement,
librdf_new_node_from_uri_string(world, (const unsigned char*)"http://example.org/pred1"));
librdf_statement_set_object(statement,
librdf_new_node_from_literal(world, (const unsigned char*)"object", NULL, 0));
librdf_model_add_statement(model, statement);
fprintf(stdout, "%s: Resulting model is:\n", program);
iostr = raptor_new_iostream_to_file_handle(raptor_world_ptr, stdout);
librdf_model_write(model, iostr);
raptor_free_iostream(iostr);
if(!librdf_model_contains_statement(model, statement)) {
fprintf(stdout, "%s: Model does not contain statement\n", program);
rc=1;
goto tidystatement;
} else
fprintf(stdout, "%s: Model contains the statement\n", program);
fprintf(stdout, "%s: Removing the statement\n", program);
librdf_model_remove_statement(model, statement);
fprintf(stdout, "%s: Resulting model is:\n", program);
iostr = raptor_new_iostream_to_file_handle(raptor_world_ptr, stdout);
librdf_model_write(model, iostr);
raptor_free_iostream(iostr);
tidystatement:
librdf_free_statement(statement);
tidymodel:
librdf_free_model(model);
tidystorage:
librdf_free_storage(storage);
tidyworld:
librdf_free_world(world);
#ifdef LIBRDF_MEMORY_DEBUG
librdf_memory_report(stderr);
#endif
/* keep gcc -Wall happy */
return(rc);
}
|
