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TagcollConsumer.h

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00001 #ifndef TAGCOLL_TAGCOLLCONSUMER_H
00002 #define TAGCOLL_TAGCOLLCONSUMER_H
00003 
00004 /*
00005  * Consumer interface for a stream of tagged items
00006  *
00007  * Copyright (C) 2003  Enrico Zini <enrico@debian.org>
00008  *
00009  * This library is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU Lesser General Public
00011  * License as published by the Free Software Foundation; either
00012  * version 2.1 of the License, or (at your option) any later version.
00013  *
00014  * This library is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017  * Lesser General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public
00020  * License along with this library; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
00022  */
00023 
00024 #pragma interface
00025 
00026 #include <tagcoll/OpSet.h>
00027 
00028 #include <string>
00029 
00030 namespace Tagcoll
00031 {
00032 
00033 // Interface for classes interested in being fed the results of the tagged
00034 // collection file parser
00035 template<class ITEM = std::string, class TAG = std::string>
00036 class TagcollConsumer
00037 {
00038 public:
00039     // Process an untagged item
00040     virtual void consume(const ITEM& item) throw () = 0;
00041 
00042     // Process a tagged item, with its tags
00043     virtual void consume(const ITEM& item, const OpSet<TAG>& tags) throw () = 0;
00044 
00045     // Process a set of items, all with no tags
00046     virtual void consume(const OpSet<ITEM>& items) throw ()
00047     {
00048         // Default implementation for consumer that have no special handling of
00049         // item groups
00050         for (typename OpSet<ITEM>::const_iterator i = items.begin();
00051                 i != items.end(); i++)
00052             consume(*i);
00053     }
00054 
00055     // Process a set of items identically tagged, with their tags
00056     virtual void consume(const OpSet<ITEM>& items, const OpSet<TAG>& tags) throw ()
00057     {
00058         // Default implementation for consumer that have no special handling of
00059         // item groups
00060         for (typename OpSet<ITEM>::const_iterator i = items.begin();
00061                 i != items.end(); i++)
00062             consume(*i, tags);
00063     }
00064 };
00065 
00066 };
00067 
00068 // vim:set ts=4 sw=4:
00069 #endif

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