Re: [Quickfix-users] Access to DataDictionary

[<or...@qu...>]

The problem with that is it would presume a single data dictionary
provider per application, which might not always be the case.

--oren

> -------- Original Message --------
> Subject: [Quickfix-users] Access to DataDictionary
> From: Marc Rossi <mro...@gm...>
> Date: Sat, March 20, 2010 4:13 pm
> To: qui...@li...
> 
> 
> QuickFIX Documentation: http://www.quickfixengine.org/quickfix/doc/html/index.html
> QuickFIX Support: http://www.quickfixengine.org/services.html<hr>Trying to get easy access to the DataDictionary from within a method that
> only has a FIX::Message reference to work with.  My current solution is as
> follows:
> 
>         std::string hdrStr;
>         m_message.getHeader().calculateString(hdrStr);
> 
>         FIX::BeginString beginString;
>         m_message.getHeader().getField(beginString);
> 
>         FIX::Session *session = FIX::Session::lookupSession(hdrStr, true);
>         const FIX::DataDictionaryProvider& ddp =
> session->getDataDictionaryProvider();
>         const FIX::DataDictionary& dd =
> ddp.getSessionDataDictionary(beginString);
> 
> The only issue this presents is that the
> DataDictionaryProvider::getSessionDataDictionary() method is not const
> friendly
> (neither is the getApplicationDataDictionary() method).  I have provided
> patches for both DataDictionaryProvider.h & .cpp
> to make those methods const friendly.
> 
> One question I have is if there is any reason the DataDictionaryProvider
> class can't provide static methods to return
> DataDictionary references?  So instead of jumping through the hoops above I
> could simply do a:
> 
>         const FIX::DataDictionary& dd =
> FIX::DataDictionaryProvider::getDataDictionary(beginString);
> 
> Any thoughts?
> 
> TIA,
> Marc
> 
> 
> --- /tmpi/quickfix/src/C++/DataDictionaryProvider.h 2010-03-07
> 20:26:26.000000000 -0600
> +++ DataDictionaryProvider.h 2010-03-19 13:53:12.000000000 -0500
> @@ -44,10 +44,10 @@
>    DataDictionaryProvider() {}
>    DataDictionaryProvider( const DataDictionaryProvider& copy );
> 
> -  const DataDictionary& getSessionDataDictionary(const BeginString&
> beginString)
> +  const DataDictionary& getSessionDataDictionary(const BeginString&
> beginString) const
>    throw( DataDictionaryNotFound );
> 
> -  const DataDictionary& getApplicationDataDictionary(const ApplVerID&
> applVerID)
> +  const DataDictionary& getApplicationDataDictionary(const ApplVerID&
> applVerID) const
>    throw( DataDictionaryNotFound );
> 
>    void addTransportDataDictionary(const BeginString& beginString, const
> DataDictionary& dd);
> 
> 
> --- /home/mrossi/quickfix/src/C++/DataDictionaryProvider.cpp 2010-03-07
> 20:26:26.000000000 -0600
> +++ DataDictionaryProvider.cpp 2010-03-19 13:54:44.000000000 -0500
> @@ -36,9 +36,9 @@
>  }
> 
>  const DataDictionary& DataDictionaryProvider::getSessionDataDictionary
> -(const BeginString& beginString) throw( DataDictionaryNotFound )
> +(const BeginString& beginString) const throw( DataDictionaryNotFound )
>  {
> -  std::map<std::string, DataDictionary>::iterator find =
> +  std::map<std::string, DataDictionary>::const_iterator find =
>      m_transportDictionaries.find(beginString);
>    if( find != m_transportDictionaries.end() )
>      return find->second;
> @@ -47,9 +47,9 @@
>  }
> 
>  const DataDictionary& DataDictionaryProvider::getApplicationDataDictionary
> -(const ApplVerID& applVerID) throw( DataDictionaryNotFound )
> +(const ApplVerID& applVerID) const throw( DataDictionaryNotFound )
>  {
> -  std::map<std::string, DataDictionary>::iterator find =
> +  std::map<std::string, DataDictionary>::const_iterator find =
>      m_applicationDictionaries.find(applVerID);
>    if( find != m_applicationDictionaries.end() )
>      return find->second;<hr>------------------------------------------------------------------------------
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