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#include "orbsvcs/Log/Hash_Iterator_i.h"
#include "orbsvcs/Log/Log_Constraint_Interpreter.h"
#include "orbsvcs/Log/Log_Constraint_Visitors.h"
#include "orbsvcs/DsLogAdminC.h"
ACE_RCSID (Log,
Hash_Iterator_i,
"$Id$")
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
TAO_Hash_Iterator_i::TAO_Hash_Iterator_i (
PortableServer::POA_ptr poa,
ACE_Reactor* reactor,
TAO_Hash_LogRecordStore* recordstore,
TAO_Hash_LogRecordStore::LOG_RECORD_STORE_ITER iter,
TAO_Hash_LogRecordStore::LOG_RECORD_STORE_ITER iter_end,
CORBA::ULong start,
const char *constraint,
CORBA::ULong max_rec_list_len)
: TAO_Iterator_i(poa, reactor),
recordstore_ (recordstore),
iter_ (iter),
iter_end_ (iter_end),
current_position_(start),
constraint_ (constraint),
max_rec_list_len_ (max_rec_list_len)
{
}
TAO_Hash_Iterator_i::~TAO_Hash_Iterator_i (void)
{
}
DsLogAdmin::RecordList*
TAO_Hash_Iterator_i::get (CORBA::ULong position,
CORBA::ULong how_many)
{
ACE_READ_GUARD_THROW_EX (ACE_SYNCH_RW_MUTEX,
guard,
this->recordstore_->lock (),
CORBA::INTERNAL ());
if (position < current_position_)
{
throw DsLogAdmin::InvalidParam ();
}
if (how_many == 0)
{
how_many = this->max_rec_list_len_;
}
// Use an Interpreter to build an expression tree.
TAO_Log_Constraint_Interpreter interpreter (constraint_.in ());
// Sequentially iterate over all the records and pick the ones that
// meet the constraints.
// Allocate the list of <how_many> length.
DsLogAdmin::RecordList* rec_list;
ACE_NEW_THROW_EX (rec_list,
DsLogAdmin::RecordList (how_many),
CORBA::NO_MEMORY ());
rec_list->length (how_many);
CORBA::ULong count = 0;
CORBA::ULong current_position = this->current_position_;
for ( ;
((this->iter_ != this->iter_end_) && (count < how_many));
++this->iter_)
{
// Use an evaluator.
TAO_Log_Constraint_Visitor visitor (this->iter_->item ());
// Does it match the constraint?
if (interpreter.evaluate (visitor) == 1)
{
if (++current_position >= position)
{
(*rec_list)[count] = this->iter_->item ();
// copy the log record.
count++;
}
}
}
rec_list->length (count);
this->current_position_ = current_position;
if (count == 0 && this->iter_ == this->iter_end_)
{
// destroy this object..
this->destroy ();
}
return rec_list;
}
TAO_END_VERSIONED_NAMESPACE_DECL
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