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103 lines
2.9 KiB
C++
103 lines
2.9 KiB
C++
/*
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* This file is part of the syndication library
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*
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* Copyright (C) 2006 Frank Osterfeld <osterfeld@kde.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You must have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef SYNDICATION_SPECIFICITEMVISITOR_H
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#define SYNDICATION_SPECIFICITEMVISITOR_H
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#include "ksyndication_export.h"
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namespace Syndication {
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class SpecificItem;
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namespace Atom
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{
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class Entry;
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}
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namespace RDF
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{
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class Item;
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}
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namespace RSS2
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{
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class Item;
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}
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/**
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* Visitor interface, following the Visitor design pattern. Use this if you
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* want to process items and the way how to handle the items depends
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* on it's concrete type (e.g. RSS2::Item, RDF::Item...).
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*
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* TODO: insert code example
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*
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* @author Frank Osterfeld
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*/
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class SYNDICATION_EXPORT SpecificItemVisitor //krazy:exclude=dpointer
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{
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public:
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/**
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* destructor
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*/
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virtual ~SpecificItemVisitor();
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/**
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* call this method to handle an item. Depending on the concrete type
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* of the item, a specialized visit method is called.
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*
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* @param item the item to process
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* @return whether this visitor handles the type of the item
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*/
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virtual bool visit(SpecificItem* item);
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/**
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* reimplement this method to handle RSS2 items.
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*
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* @param item the RSS2 item to visit
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* @return whether the visitor handled the item.
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* Reimplementations of this method must return @c true.
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*/
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virtual bool visitRSS2Item(Syndication::RSS2::Item* item);
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/**
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* reimplement this method to handle RDF items.
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*
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* @param item the RDF item to visit
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* @return whether the visitor handled the item.
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* Reimplementations of this method must return @c true.
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*/
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virtual bool visitRDFItem(Syndication::RDF::Item* item);
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/**
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* reimplement this method to handle Atom entries.
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*
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* @param item the Atom entry to visit
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* @return whether the visitor handled the entry.
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* Reimplementations of this method must return @c true.
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*/
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virtual bool visitAtomEntry(Syndication::Atom::Entry* item);
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};
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} // namespace Syndication
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#endif // SYNDICATION_SPECIFICITEMVISITOR_H
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