Chris@439: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@439: 
Chris@439: /*
Chris@439:     Sonic Visualiser
Chris@439:     An audio file viewer and annotation editor.
Chris@439:     Centre for Digital Music, Queen Mary, University of London.
Chris@439:     This file copyright 2008 QMUL.
Chris@439:    
Chris@439:     This program is free software; you can redistribute it and/or
Chris@439:     modify it under the terms of the GNU General Public License as
Chris@439:     published by the Free Software Foundation; either version 2 of the
Chris@439:     License, or (at your option) any later version.  See the file
Chris@439:     COPYING included with this distribution for more information.
Chris@439: */
Chris@439: 
Chris@439: #ifndef _SIMPLE_SPARQL_QUERY_H_
Chris@439: #define _SIMPLE_SPARQL_QUERY_H_
Chris@439: 
Chris@439: #include <QString>
Chris@439: #include <map>
Chris@439: #include <vector>
Chris@439: 
Chris@439: class ProgressReporter;
Chris@439: 
Chris@439: class SimpleSPARQLQuery
Chris@439: {
Chris@439: public:
Chris@439:     enum ValueType { NoValue, URIValue, LiteralValue, BlankValue };
Chris@439: 
Chris@439:     struct Value {
Chris@439:         Value() : type(NoValue), value() { }
Chris@439:         Value(ValueType t, QString v) : type(t), value(v) { }
Chris@439:         ValueType type;
Chris@439:         QString value;
Chris@439:     };
Chris@439: 
Chris@439:     typedef std::map<QString, Value> KeyValueMap;
Chris@439:     typedef std::vector<KeyValueMap> ResultList;
Chris@439: 
Chris@480:     SimpleSPARQLQuery(QString fromUri, QString query);
Chris@439:     ~SimpleSPARQLQuery();
Chris@439: 
Chris@439:     void setProgressReporter(ProgressReporter *reporter);
Chris@439:     bool wasCancelled() const;
Chris@439:     
Chris@439:     ResultList execute();
Chris@439: 
Chris@439:     bool isOK() const;
Chris@439:     QString getErrorString() const;
Chris@439: 
Chris@440:     // Do a query and return the value for the given binding, from the
Chris@440:     // first result that has a value for it
Chris@480:     static Value singleResultQuery(QString fromUri,
Chris@480:                                    QString query,
Chris@480:                                    QString binding);
Chris@480: 
Chris@480:     enum ImplementationPreference {
Chris@480:         UseDirectParser, // rasqal (default because it's simpler if seldom used)
Chris@480:         UseDatastore     // redland
Chris@480:     };
Chris@480:     static void setImplementationPreference(ImplementationPreference);
Chris@440: 
Chris@439: protected:
Chris@439:     class Impl;
Chris@439:     Impl *m_impl;
Chris@439: };
Chris@439: 
Chris@439: #endif