static bool
is_descendant_of(SordModel* model,
const URIs* uris,
const SordNode* child,
const SordNode* parent,
const SordNode* pred)
{
if (!child) {
return false;
} else if (sord_node_equals(child, parent) ||
sord_ask(model, child, uris->owl_equivalentClass, parent, NULL)) {
return true;
}
SordIter* i = sord_search(model, child, pred, NULL, NULL);
for (; !sord_iter_end(i); sord_iter_next(i)) {
const SordNode* o = sord_iter_get_node(i, SORD_OBJECT);
if (sord_node_equals(child, o)) {
continue; // Weird class is explicitly a descendent of itself
}
if (is_descendant_of(model, uris, o, parent, pred)) {
sord_iter_free(i);
return true;
}
}
sord_iter_free(i);
return false;
}
/** Create a new LilvNode from `node`, or return NULL if impossible */
LilvNode*
lilv_node_new_from_node(LilvWorld* world, const SordNode* node)
{
if (!node) {
return NULL;
}
LilvNode* result = NULL;
SordNode* datatype_uri = NULL;
LilvNodeType type = LILV_VALUE_STRING;
size_t len = 0;
switch (sord_node_get_type(node)) {
case SORD_URI:
result = (LilvNode*)malloc(sizeof(LilvNode));
result->world = (LilvWorld*)world;
result->type = LILV_VALUE_URI;
result->node = sord_node_copy(node);
break;
case SORD_BLANK:
result = (LilvNode*)malloc(sizeof(LilvNode));
result->world = (LilvWorld*)world;
result->type = LILV_VALUE_BLANK;
result->node = sord_node_copy(node);
break;
case SORD_LITERAL:
datatype_uri = sord_node_get_datatype(node);
if (datatype_uri) {
if (sord_node_equals(datatype_uri, world->uris.xsd_boolean))
type = LILV_VALUE_BOOL;
else if (sord_node_equals(datatype_uri, world->uris.xsd_decimal)
|| sord_node_equals(datatype_uri, world->uris.xsd_double))
type = LILV_VALUE_FLOAT;
else if (sord_node_equals(datatype_uri, world->uris.xsd_integer))
type = LILV_VALUE_INT;
else if (sord_node_equals(datatype_uri,
world->uris.xsd_base64Binary))
type = LILV_VALUE_BLOB;
else
LILV_ERRORF("Unknown datatype `%s'\n",
sord_node_get_string(datatype_uri));
}
result = lilv_node_new(
world, type, (const char*)sord_node_get_string_counted(node, &len));
lilv_node_set_numerics_from_string(result, len);
break;
}
return result;
}
static bool
check_type(SordModel* model,
const URIs* uris,
const SordNode* node,
const SordNode* type)
{
if (sord_node_equals(type, uris->rdfs_Resource) ||
sord_node_equals(type, uris->owl_Thing)) {
return true;
}
if (sord_node_get_type(node) == SORD_LITERAL) {
if (sord_node_equals(type, uris->rdfs_Literal)) {
return true;
} else if (sord_node_equals(type, uris->rdf_PlainLiteral)) {
return !sord_node_get_language(node);
} else {
return literal_is_valid(model, uris, node, type);
}
} else if (sord_node_get_type(node) == SORD_URI) {
if (sord_node_equals(type, uris->foaf_Document)) {
return true; // Questionable...
} else if (is_descendant_of(
model, uris,
type, uris->xsd_anyURI, uris->owl_onDatatype)) {
/* Type is any URI and this is a URI, so pass. Restrictions on
anyURI subtypes are not currently checked (very uncommon). */
return true; // Type is anyURI, and this is a URI
} else {
SordIter* t = sord_search(model, node, uris->rdf_type, NULL, NULL);
for (; !sord_iter_end(t); sord_iter_next(t)) {
if (is_descendant_of(model, uris,
sord_iter_get_node(t, SORD_OBJECT),
type,
uris->rdfs_subClassOf)) {
sord_iter_free(t);
return true;
}
}
sord_iter_free(t);
return false;
}
} else {
return true; // Blanks often lack explicit types, ignore
}
return false;
}
LILV_API bool
lilv_node_equals(const LilvNode* value, const LilvNode* other)
{
if (value == NULL && other == NULL)
return true;
else if (value == NULL || other == NULL)
return false;
else if (value->type != other->type)
return false;
switch (value->type) {
case LILV_VALUE_URI:
case LILV_VALUE_BLANK:
case LILV_VALUE_STRING:
case LILV_VALUE_BLOB:
return sord_node_equals(value->node, other->node);
case LILV_VALUE_INT:
return (value->val.int_val == other->val.int_val);
case LILV_VALUE_FLOAT:
return (value->val.float_val == other->val.float_val);
case LILV_VALUE_BOOL:
return (value->val.bool_val == other->val.bool_val);
}
return false; /* shouldn't get here */
}
static int
check_properties(SordModel* model, URIs* uris)
{
int st = 0;
SordIter* i = sord_begin(model);
for (; !sord_iter_end(i); sord_iter_next(i)) {
SordQuad quad;
sord_iter_get(i, quad);
const SordNode* subj = quad[SORD_SUBJECT];
const SordNode* pred = quad[SORD_PREDICATE];
const SordNode* obj = quad[SORD_OBJECT];
bool is_any_property = false;
SordIter* t = sord_search(model, pred, uris->rdf_type, NULL, NULL);
for (; !sord_iter_end(t); sord_iter_next(t)) {
if (is_descendant_of(model, uris,
sord_iter_get_node(t, SORD_OBJECT),
uris->rdf_Property,
uris->rdfs_subClassOf)) {
is_any_property = true;
break;
}
}
sord_iter_free(t);
const bool is_ObjectProperty = sord_ask(
model, pred, uris->rdf_type, uris->owl_ObjectProperty, 0);
const bool is_FunctionalProperty = sord_ask(
model, pred, uris->rdf_type, uris->owl_FunctionalProperty, 0);
const bool is_InverseFunctionalProperty = sord_ask(
model, pred, uris->rdf_type, uris->owl_InverseFunctionalProperty, 0);
const bool is_DatatypeProperty = sord_ask(
model, pred, uris->rdf_type, uris->owl_DatatypeProperty, 0);
if (!is_any_property) {
st = error("Use of undefined property", quad);
}
if (!sord_ask(model, pred, uris->rdfs_label, NULL, NULL)) {
st = errorf("Property <%s> has no label\n",
sord_node_get_string(pred));
}
if (is_DatatypeProperty &&
sord_node_get_type(obj) != SORD_LITERAL) {
st = error("Datatype property with non-literal value", quad);
}
if (is_ObjectProperty &&
sord_node_get_type(obj) == SORD_LITERAL) {
st = error("Object property with literal value", quad);
}
if (is_FunctionalProperty &&
sord_count(model, subj, pred, NULL, NULL) > 1) {
st = error("Functional property with several objects", quad);
}
if (is_InverseFunctionalProperty &&
sord_count(model, NULL, pred, obj, NULL) > 1) {
st = error("Inverse functional property with several subjects", quad);
}
if (sord_node_equals(pred, uris->rdf_type) &&
!sord_ask(model, obj, uris->rdf_type, uris->rdfs_Class, NULL) &&
!sord_ask(model, obj, uris->rdf_type, uris->owl_Class, NULL)) {
st = error("Type is not a rdfs:Class or owl:Class", quad);
}
if (sord_node_get_type(obj) == SORD_LITERAL &&
!literal_is_valid(model, uris, obj, sord_node_get_datatype(obj))) {
st = error("Literal does not match datatype", quad);
}
SordIter* r = sord_search(model, pred, uris->rdfs_range, NULL, NULL);
for (; !sord_iter_end(r); sord_iter_next(r)) {
const SordNode* range = sord_iter_get_node(r, SORD_OBJECT);
if (!check_type(model, uris, obj, range)) {
st = error("Object not in property range", quad);
fprintf(stderr, "note: Range is <%s>\n",
sord_node_get_string(range));
}
}
sord_iter_free(r);
SordIter* d = sord_search(model, pred, uris->rdfs_domain, NULL, NULL);
if (d) {
const SordNode* domain = sord_iter_get_node(d, SORD_OBJECT);
if (!check_type(model, uris, subj, domain)) {
st = error("Subject not in property domain", quad);
fprintf(stderr, "note: Domain is <%s>\n",
sord_node_get_string(domain));
}
sord_iter_free(d);
}
}
sord_iter_free(i);
return st;
}