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/*
* Copyright (C) 2013-2015, 2019 by the Konclude Developer Team.
*
* This file is part of the reasoning system Konclude.
* For details and support, see <http://konclude.com/>.
*
* Konclude is free software: you can redistribute it and/or modify
* it under the terms of version 3 of the GNU Lesser General Public
* License (LGPLv3) as published by the Free Software Foundation.
*
* Konclude is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU (Lesser) General Public License for more details.
*
* You should have received a copy of the GNU (Lesser) General Public
* License along with Konclude. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef KONCLUDE_REDLAND_INTEGRATION
#include "CRedlandStoredTriplesDataModelIterator.h"
namespace Konclude {
namespace Reasoner {
namespace Triples {
CRedlandStoredTriplesDataModelIterator::CRedlandStoredTriplesDataModelIterator(librdf_stream* stream) {
mStream = stream;
mDefaultDatatypeString = PREFIX_XML_STRING_DATATYPE;
}
CRedlandStoredTriplesDataModelIterator::~CRedlandStoredTriplesDataModelIterator() {
librdf_free_stream(mStream);
}
QString CRedlandStoredTriplesDataModelIterator::getNodeString(cint64 pos) {
librdf_statement* statement = librdf_stream_get_object(mStream);
librdf_node* node = nullptr;
if (pos == 0) {
node = librdf_statement_get_subject(statement);
} else if (pos == 1) {
node = librdf_statement_get_predicate(statement);
} else if (pos == 2) {
node = librdf_statement_get_object(statement);
}
TRIPLE_NODE_TYPE type = getNodeType(node);
if (type == CTriplesDataIterator::TRIPLE_URI_NODE_TYPE) {
librdf_uri* nodeUri = librdf_node_get_uri(node);
return QString::fromUtf8((const char*)librdf_uri_as_string(nodeUri));
} else if (type == CTriplesDataIterator::TRIPLE_BLANK_NODE_TYPE) {
const char* nodeBlankIdentifier = (const char*)librdf_node_get_blank_identifier(node);
return QString::fromUtf8(nodeBlankIdentifier);
} else {
size_t litValLen = 0;
const char* literalValue = (const char*)librdf_node_get_literal_value_as_counted_string(node, &litValLen);
librdf_uri* datatypeUri = librdf_node_get_literal_value_datatype_uri(node);
QString datatypeUriString = mDefaultDatatypeString;
if (datatypeUri) {
datatypeUriString = QString::fromUtf8((const char*)librdf_uri_as_string(datatypeUri));
}
QString literalValueString = QString::fromUtf8(literalValue, litValLen);
QString dataLiteralString = QString("\"%1\"^^%2").arg(literalValueString).arg(datatypeUriString);
return dataLiteralString;
}
}
CTriplesDataIterator::TRIPLE_NODE_TYPE CRedlandStoredTriplesDataModelIterator::getNodeType(cint64 pos) {
librdf_statement* statement = librdf_stream_get_object(mStream);
librdf_node* node = nullptr;
if (pos == 0) {
node = librdf_statement_get_subject(statement);
} else if (pos == 1) {
node = librdf_statement_get_predicate(statement);
} else if (pos == 2) {
node = librdf_statement_get_object(statement);
}
return getNodeType(node);
}
bool CRedlandStoredTriplesDataModelIterator::hasValue() {
return !librdf_stream_end(mStream);
}
CTriplesDataIterator* CRedlandStoredTriplesDataModelIterator::moveNext() {
librdf_stream_next(mStream);
return this;
}
CRedlandStoredTriplesDataModelIterator::TRIPLE_NODE_TYPE CRedlandStoredTriplesDataModelIterator::getNodeType(librdf_node* node) {
if (librdf_node_is_resource(node)) {
return CTriplesDataIterator::TRIPLE_URI_NODE_TYPE;
} else if (librdf_node_is_blank(node)) {
return CTriplesDataIterator::TRIPLE_BLANK_NODE_TYPE;
} else {
return CTriplesDataIterator::TRIPLE_LITERAL_NODE_TYPE;
}
}
}; // end namespace Triples
}; // end namespace Reasoner
}; // end namespace Konclude
#endif // !KONCLUDE_REDLAND_INTEGRATION
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