Mercurial > hg > svcore
view rdf/SimpleSPARQLQuery.h @ 455:3e0f1f7bec85
* Fix a nasty and long-standing race condition in MatrixFile's use of
FileReadThread that was causing crashes sometimes
author | Chris Cannam |
---|---|
date | Thu, 09 Oct 2008 20:10:28 +0000 |
parents | 5746c559af15 |
children | 3ffce691c9bf |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2008 QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #ifndef _SIMPLE_SPARQL_QUERY_H_ #define _SIMPLE_SPARQL_QUERY_H_ #include <QString> #include <map> #include <vector> class ProgressReporter; class SimpleSPARQLQuery { public: enum ValueType { NoValue, URIValue, LiteralValue, BlankValue }; struct Value { Value() : type(NoValue), value() { } Value(ValueType t, QString v) : type(t), value(v) { } ValueType type; QString value; }; typedef std::map<QString, Value> KeyValueMap; typedef std::vector<KeyValueMap> ResultList; SimpleSPARQLQuery(QString query); ~SimpleSPARQLQuery(); void setProgressReporter(ProgressReporter *reporter); bool wasCancelled() const; ResultList execute(); bool isOK() const; QString getErrorString() const; // Do a query and return the value for the given binding, from the // first result that has a value for it static Value singleResultQuery(QString query, QString binding); protected: class Impl; Impl *m_impl; }; #endif