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Preface

This page contains code snippets with solutions to some typical tasks for repeating groups.Items marked "since FIX Antenna 2.19" are planned for future release.

Retrieving Repeating Group Instance

Use 'getGroup' method of corresponding parent FIXMessage or nested repeating group.

Code Block

language	cpp
theme	Confluence
title	Example.cpp
linenumbers	true

#include <B2BITS_FIXMessage.h>
#include <B2BITS_FIXGroup.h>
#include <B2BITS_FIXFields.h>
//...

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);

...

Either get FIXGroup object and get it's size:

Code Block

language	cpp
theme	Confluence
title	Example.cpp
linenumbers	true

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);
int entryCount = ( pGroup == NULL ? 0 : pGroup->size() );

or get integer value of corresponding leading tag:

Code Block

language	cpp
theme	Confluence
title	Example.cpp
linenumbers	true

int entryCount = ( pMessage->isEmpty(FIXFields::NoQuoteSets) ? 0 : pMessage->getAsInt(FIXFields::NoQuoteSets) );

Iterating over Repeating Group entries and fields

...

Get access to FIXGroup instance, determine it's size,
and then access group fields same way with FIXMessage fields, except you need to specify entry index:

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);

if ( NULL != pGroup ) {
	for ( int i = 0; i < pGroup->size(); ++i ) {
	  std::cout<< pGroup->getAsString(FIXFields::QuoteSetID, i).toStdString() <<"\n";
	}
}

Please note that entry indexing starts from zero.

...

Get access to FIXGroup instance, determine it's size,
and then iterate group entries one by one; access entry content same way with FIXMessage fields.

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);

if ( NULL != pGroup ) {
	for ( int i = 0; i < pGroup->size(); ++i ) {
		TagValue* pEntry = pGroup->getEntry(i);
		std::cout<< pEntry->getAsString(FIXFields::QuoteSetID).toStdString() <<"\n";
	}
}

Example 3 (since FIX Antenna 2.19)

Use built-in iterators:

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);

if ( NULL != pGroup ) {
	FIXGroup::forward_iterator it = pGroup->begin(), end = pGroup->end();
    for (; it != end; ++it ) {
	  std::cout<< it->getAsString(FIXFields::QuoteSetID).toStdString() <<"\n";
	}
}

or, if your compiler supports C++11:

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);

if ( NULL != pGroup ) {	
    for ( auto it : *pGroup ) {
	  std::cout<< it->getAsString(FIXFields::QuoteSetID).toStdString() <<"\n";
	}
}

Iterating over Nested Repeating Groups entries and fields

Nested groups are accessed same way as top-level groups.

Example 1

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);

if ( NULL != pGroup ) {	
	for ( int i = 0; i < pGroup->size(); ++i ) {
		std::cout<< pGroup->getAsString(FIXFields::QuoteSetID, i).toStdString() <<"\n";

		FIXGroup* pNestedGroup = pGroup->getGroup(FIXFields::NoQuoteEntries, i);

		if( NULL != pNestedGroup ) {
			for ( int j = 0; j < pNestedGroup ->size(); ++j ) {
				std::cout <<"\t" << pNestedGroup ->getAsString(FIXFields::QuoteEntryID, j).toStdString() <<"\n";
			} 
		}
	}
}

Example 2 (since FIX Antenna 2.19)

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);

if ( NULL != pGroup ) {
	FIXGroup::forward_iterator it = pGroup->begin(), end = pGroup->end();
    for (; it != end; ++it ) {
		std::cout<< it->getAsString(FIXFields::QuoteSetID).toStdString() <<"\n";
      	
		FIXGroup* pNestedGroup = it->getGroup(FIXFields::NoQuoteEntries);
		if ( NULL != pNestedGroup ) {
			FIXGroup::forward_iterator nit = pNestedGroup ->begin(), nend = pNestedGroup ->end();
			for (; nit != nend; ++it ) {
				std::cout <<"\t" << pNestedGroup ->getAsString(FIXFields::QuoteEntryID, j).toStdString() <<"\n";
			}
		}
	}
}

or, if your compiler supports C++11:

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

FIXGroup* pGroup, pNestedGroup;

if( pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);) {	
    for( auto it : *pGroup ) {
		std::cout<< it->getAsString(FIXFields::QuoteSetID).toStdString() <<"\n";
		
		if ( pNestedGroup = it->getGroup(FIXFields::NoQuoteEntries) ) {
			for( auto nit : *pNestedGroup ) {
				std::cout <<"\t" << nit->getAsString(FIXFields::QuoteEntryID).toStdString() <<"\n";
			}
		}
    }
}

Resizing Repeating Group

Set corresponding leading tag to required size:

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

pMessage->setAsInt(FIXFields::NoQuoteSets, myNewSize);

If new size is greater than previous then new entries with empty contents will be added;
If new size is less than previous, then exceeding entries at the end of group will be discarded.
Setting size to zero efficiently deletes group from message.

...

Increase current size by 1 manually, fill last entry with values:

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

int noQuoteSets = pMessage->getAsInt(FIXField::NoQuoteSets);    
++noQuoteSets;
pMessage->set(FIXField::NoQuoteSets, noQuoteSets);

FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);
TagValue* pEntry = pGroup ->getEntry(noQuoteSets-1);
pEntry->set(FIXFields::QuoteSetID, "abcd");

Example 2

Reserve some space in group, fill entries, shrink group to actual size.

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

pMessage->setAsInt(FIXFields::NoQuoteSets, 200); //reserve
FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);

//iterate over Repeating Group entries, filling values
...

pMessage->set(FIXField::NoQuoteSets, actualNoQuoteSets ); //shrink

Example 3 (since FIX Antenna 2.19)

Use helpers from B2BITS_FIXMsgHelper.h:

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

#include <B2BITS_FIXMsgHelper.h>
//...

TagValue* entry = FIXMsgHelper::addEntryToNestedGroup(pMessage, FIXField::NoQuoteSets);
entry->set(FIXField::QuoteSetID, "abcd" );

Populating FIX message with nested Repeating Groups

Populating nested repeating groups is mostly same as repeating groups in message.

Example 1

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

// create one entry of NoQuoteSets in FIX message
pMessage->set(FIXField::NoQuoteSets, 1);
FIXGroup* pGroup = pMessage->getGroup(FIXFields::NoQuoteSets);
 
// create 5 entries of nested group NoQuoteEntries at entry [0] of NoQuoteSets 
pGroup->set( FIXField::NoQuoteEntries, 5, 0 ); 
 
// get access to NoQuoteEntries nested group
FIXGroup* pNestedGroup = pGroup->getGroup( FIXField::NoQuoteEntries, 0 );
 
// Fill QuoteEntryID tag in entry 0 of NoQuoteEntries nested group
pNestedGroup ->set( FIXField::QuoteEntryID, "SubEntry_0", 0 );

Example 2 (since FIX Antenna 2.19)

Use helpers from B2BITS_FIXMsgHelper.h:

MyApp.cpp

Code Block

language	cpp
theme	Confluence
title	MyApp.cpp
linenumbers	true

#include <B2BITS_FIXMsgHelper.h>
//...

FIXMsgHelper::addEntryToNestedGroup(pMessage, FIXField::NoQuoteSets);
FIXGroup& group = pMessage->getAsGroup(FIXField::NoQuoteSets);
 
// at entry 0 of NoQuoteSets add entry to NoQuoteEntries nested group
TagValue* embeddedEntry = FIXMsgHelper::addEntryToNestedGroup(group, FIXField::NoQuoteEntries, 0); 
 
// Fill QuoteEntryID tag in new entry of NoQuoteEntries nested group
embeddedEntry->set( FIXField::QuoteEntryID, "SubEntry1");

Removing arbitrary entry from Repeating Group

...

Versions Compared

Old Version 2

New Version Current

Key

Preface

Retrieving Repeating Group Instance

Iterating over Repeating Group entries and fields

Example 3 (since FIX Antenna 2.19)

Iterating over Nested Repeating Groups entries and fields

Example 1

Example 2 (since FIX Antenna 2.19)

Resizing Repeating Group

Example 2

Example 3 (since FIX Antenna 2.19)

Populating FIX message with nested Repeating Groups

Example 1

Example 2 (since FIX Antenna 2.19)

Removing arbitrary entry from Repeating Group