OW_EnvVars.hpp

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#ifndef OW_ENVVARS_HPP__
#define OW_ENVVARS_HPP__

#include "OW_config.h"
#include "OW_Map.hpp"
#include "OW_String.hpp"

namespace OW_NAMESPACE
{

class OW_COMMON_API EnvVars
{
public:
   enum EEnvVarFlag
   {
      E_CURRENT_ENVIRONMENT,
      E_EMPTY_ENVIRONMENT
   };

   EnvVars(EEnvVarFlag flag=E_EMPTY_ENVIRONMENT);
   EnvVars(const char* const envp[]);
   EnvVars(const EnvVars& arg);
   ~EnvVars();
   EnvVars& operator= (const EnvVars& arg);
   const char* const* getenvp() const;
   size_t size() const
   {
      return m_envMap.size();
   }
   String getValue(const String& key, const String& notFoundRetVal=String()) const;

   bool removeVar(const String& key);

   void setVar(const String& keyValue);

   void setVar(const String& key, const String& value);

   bool addVar(const String& name, const String& value);

   bool updateVar(const String& name, const String& value);

private:
   typedef Map<String, String> EnvMap;

   void deleteEnvp() const;
   static void fillEnvMap(const char* const envp[], EnvMap& envMap);

   EnvMap m_envMap;
   mutable char** m_envp;
};

}  // End of OW_NAMESPACE

#endif   // OW_ENVVARS_HPP__

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