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// Preference_Interpreter.cpp
// ========================================================================
// $Id$
//
// = LIBRARY
// orbsvcs
//
// = FILENAME
// Preference_Interpreter.cpp
//
// = AUTHOR
// Seth Widoff <sbw1@cs.wustl.edu>
//
// ========================================================================
#include "Preference_Interpreter.h"
#include <values.h>
#include <ctype.h>
#include <stdio.h>
TAO_Preference_Interpreter::
TAO_Preference_Interpreter(CosTradingRepos::ServiceTypeRepository::TypeStruct* ts,
const char* preference,
CORBA::Environment& _env)
TAO_THROW_SPEC ((CosTrading::Lookup::IllegalPreference))
: TAO_Interpreter ()
{
TAO_Constraint_Validator type_checker(ts);
if (TAO_Interpreter::is_empty_string(preference))
this->root_ = new TAO_Noop_Constraint(TAO_FIRST);
else
{
if (this->build_tree (preference) != 0)
TAO_THROW (CosTrading::Lookup::IllegalPreference (preference));
if (type_checker.validate (this->root_) == -1)
TAO_THROW (CosTrading::Lookup::IllegalPreference (preference));
}
}
TAO_Preference_Interpreter::
TAO_Preference_Interpreter(TAO_Constraint_Validator& validator,
const char* preference,
CORBA::Environment& _env)
TAO_THROW_SPEC ((CosTrading::Lookup::IllegalPreference))
: TAO_Interpreter ()
{
if (TAO_Interpreter::is_empty_string(preference))
this->root_ = new TAO_Noop_Constraint(TAO_FIRST);
else
{
if (this->build_tree (preference) != 0)
TAO_THROW (CosTrading::Lookup::IllegalPreference (preference));
if (validator.validate (this->root_) == -1)
TAO_THROW (CosTrading::Lookup::IllegalPreference (preference));
}
}
TAO_Preference_Interpreter::~TAO_Preference_Interpreter()
{
}
void
TAO_Preference_Interpreter::
order_offer (CosTrading::OfferId offer_id,
CosTrading::Offer* offer)
{
TAO_Constraint_Evaluator evaluator(offer);
this->order_offer (offer_id, offer, evaluator);
}
void
TAO_Preference_Interpreter::
order_offer (CosTrading::OfferId offer_id,
CosTrading::Offer* offer,
TAO_Constraint_Evaluator& evaluator)
{
if (this->root_ != 0)
{
TAO_Literal_Constraint return_value;
TAO_Expression_Type expr_type = this->root_->expr_type ();
if (evaluator.evaluate_preference (this->root_, return_value) == 0)
this->offers_.insert (return_value, make_pair (offer_id, offer));
else
{
TAO_Literal_Constraint end ((CORBA::Double) MAXDOUBLE);
this->offers_.insert (end, make_pair (offer_id, offer));
}
}
}
int
TAO_Preference_Interpreter::
remove_offer (CosTrading::OfferId& offer_id,
CosTrading::Offer*& offer)
{
int return_value = 0;
TAO_Expression_Type expr_type = this->root_->expr_type ();
ORDERED_OFFERS::iterator offer_beg = this->offers_.begin ();
ORDERED_OFFERS::iterator offer_end = this->offers_.end ();
if (offer_beg != offer_end)
{
if (expr_type == TAO_WITH || expr_type == TAO_MAX)
{
offer_end--;
offer_id = (*offer_end).second.first;
offer = (*offer_end).second.second;
this->offers_.erase (offer_end);
}
else
{
offer_id = (*offer_beg).second.first;
offer = (*offer_beg).second.second;
this->offers_.erase (offer_beg);
}
return_value = 1;
}
return return_value;
}
int
TAO_Preference_Interpreter::num_offers(void)
{
return this->offers_.size();
}
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