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140 lines
3.3 KiB
C++
140 lines
3.3 KiB
C++
//
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// TemplateCache.h
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//
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// $Id$
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//
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// Library: JSON
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// Package: JSON
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// Module: TemplateCache
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//
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// Definition of the TemplateCache class.
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//
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// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef JSON_JSONTemplateCache_INCLUDED
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#define JSON_JSONTemplateCache_INCLUDED
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#include <vector>
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#include <map>
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#include "Poco/Path.h"
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#include "Poco/SharedPtr.h"
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#include "Poco/Logger.h"
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#include "Poco/JSON/Template.h"
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namespace Poco
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{
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namespace JSON
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{
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class JSON_API TemplateCache
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/// Use to cache parsed templates. Templates are
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/// stored in a map with the full path as key.
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/// When a template file has changed, the cache
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/// will remove the old template from the cache
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/// and load a new one.
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{
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public:
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TemplateCache();
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/// Constructor. The cache must be created
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/// and not destroyed as long as it is used.
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virtual ~TemplateCache();
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/// Destructor
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void addPath(const Path& path);
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/// Add a path for resolving template paths.
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/// The order of check is FIFO.
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Template::Ptr getTemplate(const Path& path);
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/// Returns a template from the cache.
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/// When the template file is not yet loaded
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/// or when the file has changed, the template
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/// will be (re)loaded and parsed. A shared pointer
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/// is returned, so it is safe to use this template
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/// even when the template isn't stored anymore in
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/// the cache.
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static TemplateCache* instance();
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/// Returns the only instance of this cache
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void setLogger(Logger& logger);
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/// Sets the logger for the cache.
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private:
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static TemplateCache* _instance;
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std::vector<Path> _includePaths;
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std::map<std::string, Template::Ptr> _cache;
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Logger* _logger;
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void setup();
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Path resolvePath(const Path& path) const;
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};
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inline void TemplateCache::addPath(const Path& path)
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{
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_includePaths.push_back(path);
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}
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inline TemplateCache* TemplateCache::instance()
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{
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return _instance;
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}
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inline void TemplateCache::setLogger(Logger& logger)
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{
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_logger = &logger;
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}
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}} // Namespace Poco::JSON
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#endif // JSON_JSONTemplateCache_INCLUDED
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