Uri.h

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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
 
/*
    Dataquay
 
    A C++/Qt library for simple RDF datastore management.
    Copyright 2009-2012 Chris Cannam.
  
    Permission is hereby granted, free of charge, to any person
    obtaining a copy of this software and associated documentation
    files (the "Software"), to deal in the Software without
    restriction, including without limitation the rights to use, copy,
    modify, merge, publish, distribute, sublicense, and/or sell copies
    of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:
 
    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.
 
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
    Except as contained in this notice, the name of Chris Cannam
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*/
 
#ifndef DATAQUAY_URI_H
#define DATAQUAY_URI_H
 
namespace Dataquay {
class Uri;
}
 
// Declare this early, to avoid any problems with instantiation order
// arising from inclusion "races"
extern unsigned int qHash(const Dataquay::Uri &u);
 
#include <QString>
#include <QUrl>
 
#include <QMetaType>
 
#include <iostream>
 
class QDataStream;
class QTextStream;
class QVariant;
 
namespace Dataquay
{
 
class Uri
{
public:
    Uri() {
    }
 
    explicit Uri(const QString &s) : m_uri(s) {
        checkComplete();
    }
 
    explicit Uri(const QUrl &u) : m_uri(u.toString()) {
        checkComplete();
    }
    ~Uri() {
    }
 
    inline QString toString() const { return m_uri; }
    inline QUrl toUrl() const { return QUrl(m_uri); }
    inline int length() const { return m_uri.length(); }
 
    QString scheme() const;
 
    bool operator==(const Uri &u) const;
    inline bool operator!=(const Uri &u) const { return !operator==(u); }
    inline bool operator<(const Uri &u) const { return m_uri < u.m_uri; }
    inline bool operator>(const Uri &u) const { return u < *this; }
 
    static bool isCompleteUri(QString s);
 
    static QString metaTypeName();
    static int metaTypeId();
 
    static bool hasUriType(const QVariant &);
 
    static Uri rdfTypeUri();
    
private:
    void checkComplete();
    QString m_uri;
    static bool canBeComplete(QString &s);
};
 
typedef QList<Uri> UriList;
 
QDataStream &operator<<(QDataStream &out, const Uri &);
QDataStream &operator>>(QDataStream &in, Uri &);
 
std::ostream &operator<<(std::ostream &out, const Uri &);
QTextStream &operator<<(QTextStream &out, const Uri &);
 
}
 
Q_DECLARE_METATYPE(Dataquay::Uri)
 
#endif