48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_FILTER_OBSERVER_HXX
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#define MPD_FILTER_OBSERVER_HXX
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#include "check.h"
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class PreparedFilter;
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class Filter;
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/**
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* A helper class which observes calls to a #PreparedFilter and allows
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* the caller to access the #Filter instances created by it.
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*/
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class FilterObserver {
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class PreparedProxy;
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class Proxy;
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PreparedProxy *proxy = nullptr;
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public:
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/**
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* @return a proxy object
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*/
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PreparedFilter *Set(PreparedFilter *pf);
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Filter *Get();
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};
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#endif
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