topical media & game development
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lib-of-vs-libs-Poco-include-Poco-Util-ConfigurationView.h / h



  //
  // ConfigurationView.h
  //
  // Id: //poco/1.3/Util/include/Poco/Util/ConfigurationView.h#1 
  //
  // Library: Util
  // Package: Configuration
  // Module:  ConfigurationView
  //
  // Definition of the ConfigurationView class.
  //
  // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
  // and Contributors.
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  // 
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  // DEALINGS IN THE SOFTWARE.
  //
  
  ifndef Util_ConfigurationView_INCLUDED
  define Util_ConfigurationView_INCLUDED
  
  include "Poco/Util/Util.h"
  include "Poco/Util/AbstractConfiguration.h"
  
  namespace Poco {
  namespace Util {
  
  class Util_API ConfigurationView: public AbstractConfiguration
This configuration implements a "view" into a sub-hierarchy of another configuration. For example, given a configuration with the following properties: config.value1 config.value2 config.sub.value1 config.sub.value2 and a ConfigurationView with the prefix "config", then the above properties will be available via the view as value1 value2 sub.value1 sub.value2 A ConfigurationView is most useful in combination with a LayeredConfiguration. If a property is not found in the view, it is searched in the original configuration. Given the above example configuration, the property named "config.value1" will still be found in the view. The main reason for this is that placeholder expansion ({property}) still works as expected given a ConfigurationView. { public: ConfigurationView(const std::string& prefix, AbstractConfiguration* pConfig); Creates the ConfigurationView. The ConfigurationView does not take ownership of the passed configuration. 

  protected:
          bool getRaw(const std::string& key, std::string& value) const;
          void setRaw(const std::string& key, const std::string& value);
          void enumerate(const std::string& key, Keys& range) const;
          
          std::string translateKey(const std::string& key) const;
          
          ~ConfigurationView();
  
  private:
          ConfigurationView(const ConfigurationView&);
          ConfigurationView& operator = (const ConfigurationView&);
  
          std::string _prefix;
          AbstractConfiguration* _pConfig;
  };
  
  } } // namespace Poco::Util
  
  endif // Util_ConfigurationView_INCLUDED
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

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