raptor_abbrev_subject* raptor_abbrev_subject_lookup(raptor_avltree* nodes, raptor_sequence* subjects, raptor_sequence* blanks, raptor_identifier_type node_type, const void *node_data) { raptor_sequence *sequence; raptor_abbrev_subject* rv_subject; /* Search for specified resource in resources array. * FIXME: this should really be a hash, not a list. */ sequence= (node_type == RAPTOR_IDENTIFIER_TYPE_ANONYMOUS) ? blanks : subjects; rv_subject= raptor_abbrev_subject_find(sequence, node_type, node_data, NULL); /* If not found, create one and insert it */ if(!rv_subject) { raptor_abbrev_node* node = raptor_abbrev_node_lookup(nodes, node_type, node_data, NULL, NULL); if(node) { rv_subject = raptor_new_abbrev_subject(node); if(rv_subject) { if(raptor_sequence_push(sequence, rv_subject)) { rv_subject = NULL; } } } } return rv_subject; }
/* * raptor_turtle_emit_blank: * @serializer: #raptor_serializer object * @node: blank node * @depth: depth into tree * * Emit a description of a blank node * * Return value: non-0 on failure **/ static int raptor_turtle_emit_blank(raptor_serializer *serializer, raptor_abbrev_node* node, int depth) { raptor_turtle_context* context=(raptor_turtle_context*)serializer->context; int rc=0; RAPTOR_DEBUG5("Emitting blank node %p refcount %d subject %d object %d\n", node, node->ref_count, node->count_as_subject, node->count_as_object); if(node->type != RAPTOR_IDENTIFIER_TYPE_ANONYMOUS) return 1; if((node->count_as_subject == 1 && node->count_as_object == 1)) { /* If this is only used as a 1 subject and object or never * used as a subject or never used as an object, it never need * be referenced with an explicit name */ raptor_abbrev_subject* blank; blank = raptor_abbrev_subject_find(context->blanks, node->type, node->value.blank.string); if(blank) { rc = raptor_turtle_emit_subject(serializer, blank, depth+1); raptor_abbrev_subject_invalidate(blank); } } else { /* Blank node that needs an explicit name */ const unsigned char *node_id = node->value.blank.string; raptor_turtle_writer_raw(context->turtle_writer, (const unsigned char*)"_:"); raptor_turtle_writer_raw(context->turtle_writer, node_id); } RAPTOR_DEBUG2("Emitted %p\n", node); return rc; }
/* * raptor_turtle_emit_subject_collection_items: * @serializer: #raptor_serializer object * @subject: subject node * @depth: depth into tree * * Emit an abbreviated rdf collection of items (rdf:first, rdf:rest) about a subject node. * * Return value: non-0 on failure **/ static int raptor_turtle_emit_subject_collection_items(raptor_serializer* serializer, raptor_abbrev_subject* subject, int depth) { raptor_turtle_context* context=(raptor_turtle_context*)serializer->context; int rv = 0; raptor_avltree_iterator* iter=NULL; int i; int is_new_subject = 0; RAPTOR_DEBUG5("Emitting subject collection items for node %p refcount %d subject %d object %d\n", subject->node, subject->node->ref_count, subject->node->count_as_subject, subject->node->count_as_object); /* if just saw a new subject (is_new_subject is true) then there is no need * to advance the iterator - it was just reset */ for(i=0, (iter=raptor_new_avltree_iterator(subject->properties, NULL, NULL, 1)); iter && !rv; i++, (rv = is_new_subject ? 0 : raptor_avltree_iterator_next(iter))) { raptor_abbrev_node** nodes; raptor_abbrev_node* predicate; raptor_abbrev_node* object; is_new_subject = 0; nodes=(raptor_abbrev_node**)raptor_avltree_iterator_get(iter); if(!nodes) break; predicate= nodes[0]; object= nodes[1]; if(!raptor_uri_equals_v2(serializer->world, predicate->value.resource.uri, context->rdf_first_uri)) { raptor_serializer_error(serializer, "Malformed collection - first predicate is not rdf:first"); return 1; } if(!object) continue; if(i > 0) raptor_turtle_writer_newline(context->turtle_writer); switch(object->type) { case RAPTOR_IDENTIFIER_TYPE_RESOURCE: rv = raptor_turtle_emit_resource(serializer, object, depth+1); break; case RAPTOR_IDENTIFIER_TYPE_LITERAL: rv = raptor_turtle_emit_literal(serializer, object, depth+1); break; case RAPTOR_IDENTIFIER_TYPE_XML_LITERAL: rv = raptor_turtle_emit_xml_literal(serializer, object, depth+1); break; case RAPTOR_IDENTIFIER_TYPE_ANONYMOUS: rv = raptor_turtle_emit_blank(serializer, object, depth+1); break; case RAPTOR_IDENTIFIER_TYPE_ORDINAL: /* ordinals should never appear as an object with current parsers */ case RAPTOR_IDENTIFIER_TYPE_PREDICATE: /* predicates should never appear as an object */ case RAPTOR_IDENTIFIER_TYPE_UNKNOWN: default: RAPTOR_FATAL1("Unsupported identifier type\n"); break; } /* last item */ rv=raptor_avltree_iterator_next(iter); if(rv) break; nodes=(raptor_abbrev_node**)raptor_avltree_iterator_get(iter); predicate = nodes[0]; object = nodes[1]; if(!raptor_uri_equals_v2(serializer->world, predicate->value.resource.uri, context->rdf_rest_uri)) { raptor_serializer_error(serializer, "Malformed collection - second predicate is not rdf:rest"); return 1; } if(object->type == RAPTOR_IDENTIFIER_TYPE_ANONYMOUS) { subject = raptor_abbrev_subject_find(context->blanks, object->type, object->value.blank.string); if(!subject) { raptor_serializer_error(serializer, "Malformed collection - could not find subject for rdf:rest"); return 1; } /* got a <(old)subject> rdf:rest <(new)subject> triple so know * subject has changed and should reset the properties iterator */ if(iter) raptor_free_avltree_iterator(iter); iter = raptor_new_avltree_iterator(subject->properties, NULL, NULL, 1); is_new_subject = 1; } else { if(object->type != RAPTOR_IDENTIFIER_TYPE_RESOURCE || !raptor_uri_equals_v2(serializer->world, object->value.resource.uri, context->rdf_nil_uri)) { raptor_serializer_error(serializer, "Malformed collection - last rdf:rest resource is not rdf:nil"); return 1; } break; } } if(iter) raptor_free_avltree_iterator(iter); return rv; }
/* * raptor_turtle_emit_subject_collection_items: * @serializer: #raptor_serializer object * @subject: subject node * @depth: depth into tree * * Emit an abbreviated rdf collection of items (rdf:first, rdf:rest) about a subject node. * * Return value: non-0 on failure **/ static int raptor_turtle_emit_subject_collection_items(raptor_serializer* serializer, raptor_abbrev_subject* subject, int depth) { raptor_turtle_context* context = (raptor_turtle_context*)serializer->context; int rv = 0; raptor_avltree_iterator* iter = NULL; int i; int is_new_subject = 0; RAPTOR_DEBUG5("Emitting subject collection items for node %p refcount %d subject %d object %d\n", subject->node, subject->node->ref_count, subject->node->count_as_subject, subject->node->count_as_object); /* if just saw a new subject (is_new_subject is true) then there is no need * to advance the iterator - it was just reset */ for(i = 0, (iter = raptor_new_avltree_iterator(subject->properties, NULL, NULL, 1)); iter && !rv; i++, (rv = is_new_subject ? 0 : raptor_avltree_iterator_next(iter))) { raptor_abbrev_node** nodes; raptor_abbrev_node* predicate; raptor_abbrev_node* object; is_new_subject = 0; nodes = (raptor_abbrev_node**)raptor_avltree_iterator_get(iter); if(!nodes) break; predicate= nodes[0]; object= nodes[1]; if(!raptor_uri_equals(predicate->term->value.uri, context->rdf_first_uri)) { raptor_log_error(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL, "Malformed collection - first predicate is not rdf:first"); return 1; } if(!object) continue; if(i > 0) raptor_turtle_writer_newline(context->turtle_writer); switch(object->term->type) { case RAPTOR_TERM_TYPE_URI: rv = raptor_turtle_emit_resource(serializer, object, depth+1); break; case RAPTOR_TERM_TYPE_LITERAL: rv = raptor_turtle_emit_literal(serializer, object, depth+1); break; case RAPTOR_TERM_TYPE_BLANK: rv = raptor_turtle_emit_blank(serializer, object, depth+1); break; case RAPTOR_TERM_TYPE_UNKNOWN: default: raptor_log_error_formatted(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL, "Triple has unsupported term type %d", object->term->type); break; } /* Return error if emitting something failed above */ if(rv) return rv; /* last item */ rv = raptor_avltree_iterator_next(iter); if(rv) break; nodes = (raptor_abbrev_node**)raptor_avltree_iterator_get(iter); predicate = nodes[0]; object = nodes[1]; if(!raptor_uri_equals(predicate->term->value.uri, context->rdf_rest_uri)) { raptor_log_error(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL, "Malformed collection - second predicate is not rdf:rest"); return 1; } if(object->term->type == RAPTOR_TERM_TYPE_BLANK) { subject = raptor_abbrev_subject_find(context->blanks, object->term); if(!subject) { raptor_log_error(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL, "Malformed collection - could not find subject for rdf:rest"); return 1; } /* got a <(old)subject> rdf:rest <(new)subject> triple so know * subject has changed and should reset the properties iterator */ if(iter) raptor_free_avltree_iterator(iter); iter = raptor_new_avltree_iterator(subject->properties, NULL, NULL, 1); is_new_subject = 1; } else { if(object->term->type != RAPTOR_TERM_TYPE_URI || !raptor_uri_equals(object->term->value.uri, context->rdf_nil_uri)) { raptor_log_error(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL, "Malformed collection - last rdf:rest resource is not rdf:nil"); return 1; } break; } } if(iter) raptor_free_avltree_iterator(iter); return rv; }