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syndication/rdf

literal.cpp
00001 /*
00002  * This file is part of the syndication library
00003  *
00004  * Copyright (C) 2006 Frank Osterfeld <osterfeld@kde.org>
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Library General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2 of the License, or (at your option) any later version.
00010  *
00011  * This library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Library General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Library General Public License
00017  * along with this library; see the file COPYING.LIB.  If not, write to
00018  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 #include "literal.h"
00024 #include "nodevisitor.h"
00025 
00026 #include <QtCore/QString>
00027 
00028 namespace Syndication {
00029 namespace RDF {
00030 
00031 class Literal::LiteralPrivate
00032 {
00033     public:
00034     
00035         QString text;
00036         unsigned int id;
00037 
00038         bool operator==(const LiteralPrivate& other) const
00039         {
00040             return text == other.text;
00041         }
00042 };
00043 
00044 Literal::Literal() : d()
00045 {
00046 }
00047 
00048 Literal::Literal(const Literal& other) : Node(other)
00049 {
00050     d = other.d;
00051 }
00052 
00053 Literal* Literal::clone() const
00054 {
00055     return new Literal(*this);
00056 }
00057     
00058 void Literal::accept(NodeVisitor* visitor, NodePtr ptr)
00059 {
00060     LiteralPtr lptr = boost::static_pointer_cast<Syndication::RDF::Literal>(ptr);
00061     if (!visitor->visitLiteral(lptr))
00062         Node::accept(visitor, ptr);
00063 }
00064 
00065 Literal::Literal(const QString& text) : d(new LiteralPrivate)
00066 {
00067     d->text = text;
00068     d->id = idCounter++;
00069 }
00070 
00071 Literal::~Literal()
00072 {
00073 }
00074 
00075 Literal& Literal::operator=(const Literal& other)
00076 {
00077     d = other.d;
00078     return *this;
00079 }
00080 
00081 bool Literal::operator==(const Node& other) const
00082 {
00083     const Literal* o2 = dynamic_cast<const Literal*>(&other);
00084     if (!o2)
00085         return false;
00086 
00087     if (!d || !o2->d)
00088         return d == o2->d;
00089 
00090     return *d == *(o2->d);
00091 }
00092 
00093 bool Literal::isNull() const
00094 {
00095     return !d;
00096 }
00097 
00098 unsigned int Literal::id() const
00099 {
00100     return d ? d->id : 0;
00101 }
00102 
00103 bool Literal::isResource() const
00104 {
00105     return false;
00106 }
00107 
00108 bool Literal::isProperty() const
00109 {
00110     return false;
00111 }
00112 
00113 bool Literal::isLiteral() const
00114 {
00115     return true;
00116 }
00117 
00118 bool Literal::isAnon() const
00119 {
00120     return false;
00121 }
00122 
00123 bool Literal::isSequence() const
00124 {
00125     return false;
00126 }
00127 
00128 QString Literal::text() const
00129 {
00130     return d ? d->text : QString();
00131 }
00132 
00133 Literal::operator QString() const
00134 {
00135     return d ? d->text : QString();
00136 }
00137 
00138 void Literal::setModel(const Model& /*model*/)
00139 {
00140 }
00141 
00142 void Literal::setId(unsigned int id)
00143 {
00144     d->id = id;
00145 }
00146 
00147 } // namespace RDF
00148 } // namespace Syndication

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