Database::Creator< T > Class Template Reference

to create records in the berkeley db. More...

#include <generaldata.h>

Collaboration diagram for Database::Creator< T >:

[legend]List of all members.

Public Member Functions
	Creator (TrapperDoc *doc, std::string dataType)
	constructor
	~Creator ()
db_recno_t	create (bool useRecno, DbTxn *txnid=NULL)
	create a new record in the berkeley db
void	destroy (DbTxn *txnid=NULL)
	Removes a record from the DB.
T *	data ()
	returns a pointer to the data
Protected Attributes
T *	m_data
Db *	m_db

---

Detailed Description

template<class T>
class Database::Creator< T >

to create records in the berkeley db.

Parameters:

T

the derived GeneralData class that the pointer data() points to. By having this template argument we avoid the need of dynamic_cast by the users of this class.

Definition at line 169 of file generaldata.h.

---

Constructor & Destructor Documentation

template<class T> Database::Creator< T >::Creator (  TrapperDoc *  doc, std::string  dataType )

constructor Parameters: doc  doc with the berkeley dbs opened dataType  the lookup string for the derived GeneralData class that are to be stored. Definition at line 199 of file generaldata.h. References TrapperDoc::findTrDb(), Database::Creator< T >::m_data, Database::Creator< T >::m_db, GeneralMaker::newData(), and TrDb::primaryDb(). { m_data = dynamic_cast< T * >(GeneralMaker::newData( dataType )); Q_CHECK_PTR( m_data ); std::string datatype = m_data->uniqueName(); m_db = doc->findTrDb( datatype )->primaryDb(); // cerr<<"In Creator(), doc: "<<doc<<endl; }

template<class T> Database::Creator< T >::~Creator (   )

Definition at line 209 of file generaldata.h. References Database::Creator< T >::m_data. { Q_CHECK_PTR( m_data ); delete m_data; }

---

Member Function Documentation

template<class T> db_recno_t Database::Creator< T >::create (  bool  useRecno, DbTxn *  txnid = NULL )

create a new record in the berkeley db Parameters: useRecno  if true save at the index place of given from the GeneralData::getRecno() of the data(). If false a new recno value is automatically chosen by berkeley db. txnid  a transaction id to encompass this operation in. If NULL this operation will not be transaction-protected. Definition at line 216 of file generaldata.h. References Database::Creator< T >::data(), Database::Creator< T >::m_data, and Database::Creator< T >::m_db. Referenced by MAl::commit_feat_to_db(), MAl::commit_seq_to_db(), TrapperDoc::import(), TrapperDoc::importChromat(), TrapperDoc::importMates(), TrapperDoc::importPhd(), TrapperView::readSelected(), MoveAlgo::start(), and TrapperParser::startElement(). { // std::cerr<<"In "<<std::endl; // std::cerr<<"txnid: "<<txnid<<std::endl; QByteArray ar; QDataStream stream( ar, IO_WriteOnly ); // std::cerr<<"Check1 "<<std::endl; m_data->writeStream( stream ); // std::cerr<<"Check2 "<<std::endl; Dbt data( ar.data(), ar.size() ); // std::cerr<<"Check3 "<<std::endl; Dbt key; // db_recno_t recno; db_recno_t the_recno(0);//EA u_int32_t flags = 0; if ( useRecno ) { // std::cerr<<"Check4:1 "<<std::endl; the_recno = m_data->getRecno(); key.set_data( &the_recno ); key.set_size( sizeof( the_recno ) ); } else { // std::cerr<<"Check4:2 "<<std::endl; flags |= DB_APPEND; assert( flags == DB_APPEND ); } // std::cerr<<"Check5 "<<std::endl; // std::cerr<<"Db: "<<m_db<<std::endl; // m_data->print_debug_info(); // std::cerr<<"Back from debug "<<endl; int ret; if ((ret = m_db->put(txnid, &key, &data, flags )) != 0) { // std::cerr<<"Check5:1 "<<std::endl; m_db->err(ret, "error in create"); // std::cerr<<"Check5:2 "<<std::endl; exit( 1 ); } // std::cerr<<"Check6 "<<std::endl; db_recno_t recnoRet = * static_cast< db_recno_t * >( key.get_data() ); // std::cerr<<"Out "<<std::endl; return recnoRet; }

template<class T> T* Database::Creator< T >::data (   )  [inline]

returns a pointer to the data Definition at line 192 of file generaldata.h. References Database::Creator< T >::m_data. Referenced by MAl::commit_feat_to_db(), MAl::commit_seq_to_db(), Database::Creator< T >::create(), Destroyer::destroy(), TrapperDoc::import(), TrapperDoc::importChromat(), TrapperDoc::importMates(), TrapperDoc::importPhd(), TrapperView::readSelected(), MoveAlgo::start(), and TrapperParser::startElement(). { return m_data; }

template<class T> void Database::Creator< T >::destroy (  DbTxn *  txnid = NULL  )

Removes a record from the DB. Definition at line 265 of file generaldata.h. References Database::Creator< T >::m_data, and Database::Creator< T >::m_db. Referenced by MAl::commit_feat_to_db(), and Destroyer::destroy(). { Dbt key; db_recno_t the_recno(0); u_int32_t flags = 0; the_recno = m_data->getRecno(); key.set_data( &the_recno ); key.set_size( sizeof( the_recno ) ); int ret; if ((ret = m_db->del(txnid, &key, flags )) != 0) { m_db->err(ret, "error in Creator::destroy"); exit( 1 ); } }

---

Member Data Documentation

template<class T> T* Database::Creator< T >::m_data [protected]

Definition at line 194 of file generaldata.h. Referenced by Database::Creator< T >::create(), Database::Creator< T >::Creator(), Database::Creator< T >::data(), Database::Creator< T >::destroy(), and Database::Creator< T >::~Creator().

template<class T> Db* Database::Creator< T >::m_db [protected]

Definition at line 195 of file generaldata.h. Referenced by Database::Creator< T >::create(), Database::Creator< T >::Creator(), and Database::Creator< T >::destroy().

---

The documentation for this class was generated from the following file:

• generaldata.h

---