FlagMap< OutputType > Class Template Reference

Maps names to constants. More...

#include <keyvalue/key/map/FlagMap.h>

List of all members.

Public Types
typedef OutputType	OutputType_
Public Member Functions
OutputType	map (const value::Variant &variant) const
	Performs the mapping.
virtual OutputType	get (const string &name) const =0
	Performs the mapping from string to OutputType.
Private Member Functions
virtual string	getName () const =0
	Gets Key's name.

---

Detailed Description

template<typename OutputType>
class keyvalue::key::FlagMap< OutputType >

Maps names to constants.

A string is mapped to a flag (normally an enum). Consider, for instance, key::Device which specifies a logger::Logger type to be build. Users provide a string either "Console", "File" or "Standard". However, inside keyvalue, devices are designated by key::Device::Flag. An error occurs when a string cannot be mapped to a valid output.

Traits derived classes which uses this map must implement a method to perform the mapping. This method has the following signature

OutputType get(const string& name) const;

Parameters:

OutputType

: (template parameter) Output type.

Return values:

OutputType_

: Same as OutputType.

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Member Function Documentation

OutputType map

(

const value::Variant &

variant

)

const

Performs the mapping.

This method converts the input from value::Variant to string and calls get().

Parameters:

variant

: A value::Variant containing the input string to be mapped.

Returns:

The mapping result.

virtual OutputType get

(

const string &

name

)

const [pure virtual]

Performs the mapping from string to OutputType.

Must be implemented by derived real keys.

Parameters:

name

: The string to be mapped.

Returns:

The mapped value.

virtual string getName

(

)

const [private, pure virtual]

Gets Key's name.

Returns:

The Key's name.