broker.cc

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#include <map>
#include <string>
 
#include "broker.h"
#include "convert.h"
#include "operators.h"
#include "recursivedescent.h"
#include "session.h"
 
using namespace ::std;
using namespace Binc;
 
//----------------------------------------------------------------------
BrokerFactory::BrokerFactory(void)
{
  brokers[Session::NONAUTHENTICATED] = new Broker();
  brokers[Session::AUTHENTICATED] = new Broker();
  brokers[Session::SELECTED] = new Broker();
}
 
//----------------------------------------------------------------------
BrokerFactory::~BrokerFactory(void)
{
  for (map<int, Broker *>::iterator i = brokers.begin(); 
       i != brokers.end(); ++i)
    delete i->second;
}
 
//----------------------------------------------------------------------
BrokerFactory &BrokerFactory::getInstance(void)
{
  static BrokerFactory brokerfactory;
  return brokerfactory;
}
 
//----------------------------------------------------------------------
void BrokerFactory::addCapability(const std::string &c)
{
  for (map<int, Broker *>::iterator i = brokers.begin(); 
       i != brokers.end(); ++i) {
    CapabilityOperator * o;
    o = dynamic_cast<CapabilityOperator*>(i->second->get("CAPABILITY"));
    if (o != 0) {
      o->addCapability(c);
      break;
    }
  }
}
 
//----------------------------------------------------------------------
void BrokerFactory::assign(const string &fname, Operator *o)
{
  int deletable = true;
  for (map<int, Broker *>::iterator i = brokers.begin(); 
       i != brokers.end(); ++i)
    if (i->first & o->getState()) {
      i->second->assign(fname, o, deletable);
      deletable = false;
    }
}
 
//----------------------------------------------------------------------
Operator *BrokerFactory::getOperator(int state, const string &name) const
{
  if (brokers.find(state) == brokers.end())
    return 0;
  else
    return brokers.find(state)->second->get(name);
}
 
//----------------------------------------------------------------------
Broker *BrokerFactory::getBroker(int state)
{
  if (brokers.find(state) == brokers.end()) {
    setLastError("No appropriate broker for state.");
    return 0;
  }
 
  return brokers[state];
}
 
//----------------------------------------------------------------------
Broker::Broker(void)
{
}
 
//----------------------------------------------------------------------
Broker::~Broker(void)
{
}
 
//----------------------------------------------------------------------
void Broker::assign(const string &fname, Operator *o, bool deletable)
{
  deletables[fname] = deletable;
  operators[fname] = o;
}
 
//----------------------------------------------------------------------
Operator *Broker::get(const string &name) const
{
  if (operators.find(name) == operators.end()) return 0;
 
  return operators.find(name)->second;
}
 
//----------------------------------------------------------------------
Operator::ParseResult Broker::parseStub(Request &command)
{
  Session &session = Session::getInstance();
 
  string tag;
  string cmd;
 
  switch (expectTag(tag)) {
    case Operator::ACCEPT:
      break;
    case Operator::REJECT:
      session.setLastError("Syntax error; first token must be a tag");
    case Operator::ERROR:
      return Operator::ERROR;
    case Operator::TIMEOUT:
      return Operator::TIMEOUT;
  }
 
  switch (expectSPACE()) {
    case Operator::ACCEPT:
      break;
    case Operator::REJECT:
      session.setLastError("Syntax error; second token must be a SPACE");
    case Operator::ERROR:
      return Operator::ERROR;
    case Operator::TIMEOUT:
      return Operator::TIMEOUT;
  }
 
  switch (expectAstring(cmd)) {
    case Operator::ACCEPT:
      break;
    case Operator::REJECT:
      session.setLastError("Syntax error; third token must be a command");
    case Operator::ERROR:
      return Operator::ERROR;
    case Operator::TIMEOUT:
      return Operator::TIMEOUT;
  }
 
  uppercase(cmd);
 
  if (cmd == "UID") {
      command.setUidMode();
 
      switch (expectSPACE()) {
        case Operator::ACCEPT:
          break;
      case Operator::REJECT:
       session.setLastError("Syntax error; after UID there"
           " must come a SPACE");
      case Operator::ERROR:
        return Operator::ERROR;
      case Operator::TIMEOUT:
        return Operator::TIMEOUT;
      }
 
      switch (expectAstring(cmd)) {
        case Operator::ACCEPT:
         break;
      case Operator::REJECT:
        session.setLastError("Syntax error; after UID "
           "SPACE there must come a command");
      case Operator::ERROR:
        return Operator::ERROR;
      case Operator::TIMEOUT:
       return Operator::TIMEOUT;
      }
 
      uppercase(cmd);
    }
 
  command.setTag(tag);
  command.setName(cmd);
 
  return Operator::ACCEPT;
}