CConfigurableObject.cpp

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/*
                    GNU GENERAL PUBLIC LICENSE
                       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
                       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Everyone is permitted to copy and distribute verbatim copies
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*/

#include <CConfigurableObject.h>
#include <CConfigurationParameter.h>
#include <TCLInterpreter.h>
#include <TCLResult.h>
#include <CIntConfigParam.h>
#include <CIntArrayParam.h>
#include <CBoolConfigParam.h>
#include <CStringConfigParam.h>
#include <CStringArrayparam.h>



CConfigurableObject::CConfigurableObject(const string&    rName,
                                        CTCLInterpreter& rInterp) :
  CTCLProcessor(rName.c_str(), &rInterp),
  m_sName(rName)
{
  // Note that the list has a fully functional default construtor.

  Register();                   // Register command on current interp.
}

CConfigurableObject::~CConfigurableObject()
{
  DeleteParameters();
}


int 
CConfigurableObject::operator()(CTCLInterpreter& rInterp, 
                            CTCLResult& rResult, 
                            int nArgs, char** pArgs)  
{ 
  int nStatus = TCL_OK;
  assert(m_sName == string(*pArgs));
  nArgs--;
  pArgs++;
  
  if(nArgs) {
    // Match the command keyword against the ones we understand:
    // config, cget or help
    //
    string sCommand(*pArgs);
    pArgs++; 
    nArgs--;
    if(sCommand == string("config")) {
      nStatus = Configure(rInterp, rResult, nArgs, pArgs);
    }
    else if(sCommand == string("cget")) {
      nStatus = ListConfiguration(rInterp, rResult, nArgs, pArgs);
    }
    else if(sCommand == string("help")) {
      rResult = Usage();
    }
    else {                    // NO command match.
      rResult = m_sName;
      rResult += " unrecognized subcommand \n";
      rResult += Usage();
      nStatus  = TCL_ERROR;
      
    }
  }
  else {
    rResult  = " Insufficient parameters:\n";
    rResult += Usage();
    nStatus  = TCL_ERROR;
  }

  return nStatus;
}  

int 
CConfigurableObject::Configure(CTCLInterpreter& rInterp, 
                            CTCLResult& rResult, 
                            int nArgs, char** pArgs)  
{
  int nStatus = TCL_OK;
  while (nArgs) {
    if(nArgs < 2) {
      if(nArgs) {
        rResult += *pArgs;
      }
      rResult += " : Keyword without parameters.";
      rResult += Usage();
      return TCL_ERROR;
    }
    string   Keyword(pArgs[0]);     // Extract the command
    string   Parameter(pArgs[1]);   // and its keywords.
    nArgs -= 2;
    pArgs += 2;
    
    ParameterIterator pParam = Find(Keyword);
    if(pParam != m_Configuration.end()) {
      CConfigurationParameter* p = *pParam;
      (*p)(rInterp, rResult, Parameter.c_str());
    }
    else {
      nStatus = TCL_ERROR;
      rResult += "Unrecognized config keyword/param pair\n";
      rResult += " Keyword: ";
      rResult += Keyword;
      rResult += " Parameter: ";
      rResult += Parameter;
      rResult += "\n";
    }
  }
  return nStatus;
}  


int 
CConfigurableObject::ListConfiguration(CTCLInterpreter& rInterp,
                                    CTCLResult& rResult, 
                                    int nArgs, char** pArgs)  
{ 
  int nStatus = TCL_OK;
  if(nArgs > 1) {
    rResult += " Too many parameters in cget\n";
    rResult += Usage();
    nStatus = TCL_ERROR;
  }
  else {
    string sPattern = "*";     // Assume no parameters.
    if(nArgs) {
      sPattern = *pArgs;
    }
    string listing = ListParameters( sPattern);
    rResult        = listing;
  }
  return nStatus;
} 

CConfigurableObject::ParameterIterator 
CConfigurableObject::AddIntParam(const string& sParamName,
                              int nDefault)  
{ 
  CIntConfigParam* pNewParam = new CIntConfigParam(sParamName,
                                                   nDefault);
  m_Configuration.push_back(pNewParam);
  return Find(sParamName);
}  

CConfigurableObject::ParameterIterator 
CConfigurableObject::AddIntArrayParam(const string& rParamName, 
                                   int nArraySize,
                                   int nDefault)  
{ 
  CIntArrayParam* pNew = new CIntArrayParam(rParamName,
                                            nArraySize,
                                            nDefault);
  m_Configuration.push_back(pNew);
  return Find(rParamName);

}  

CConfigurableObject::ParameterIterator
CConfigurableObject::AddBoolParam(const string& rName, 
                               bool fDefault)  
{ 
  CBoolConfigParam* pParam = new CBoolConfigParam(rName, 
                                                  fDefault);
  m_Configuration.push_back(pParam);
  return Find(rName);

}

CConfigurableObject::ParameterIterator
CConfigurableObject::AddStringParam(const string& rName)
{
  CStringConfigParam *p = new CStringConfigParam(rName);
  m_Configuration.push_back(p);
  return Find(rName);


}
CConfigurableObject::ParameterIterator
CConfigurableObject::AddStringArrayParam(const string& rName,
                                     int nArraySize)
{
  CStringArrayparam* p = new CStringArrayparam(rName, nArraySize);
  m_Configuration.push_back(p);
  return Find(rName);

}



string 
CConfigurableObject::Usage()  
{
  string help;
  help  = m_sName;
  help += " config ";
  help += ListKeywords();
  help += "\n";
  help += m_sName;
  help += " cget ?pattern?\n";
  help += m_sName;
  help += " help";
  
  return help;
}  

CConfigurableObject::ParameterIterator
CConfigurableObject::begin()
{
  return m_Configuration.begin();
}

CConfigurableObject::ParameterIterator
CConfigurableObject::end()
{
  return m_Configuration.end();
}

int
CConfigurableObject::size()
{
  return m_Configuration.size();
}

string
CConfigurableObject::ListParameters(const string& rPattern)
{
  CTCLString result;
  ParameterIterator p = m_Configuration.begin();
  while(p != m_Configuration.end()) {
    if(Tcl_StringMatch( ((*p)->getSwitch().c_str()),
                       rPattern.c_str())) {
      result.StartSublist();
      result.AppendElement((*p)->getSwitch());
      result.AppendElement((*p)->getOptionString());
      result.EndSublist();
    }
    p++;
  }
  return string((const char*)result);
}
string
CConfigurableObject::ListKeywords()
{
  string result;
  ParameterIterator p = m_Configuration.begin();
  while(p != m_Configuration.end()) {
    result += (*p)->getSwitch();
    result += " ";
    result += (*p)->GetParameterFormat();
    result += " ";
    
    p++;
  }
  return result;
}


CConfigurableObject::ParameterIterator
CConfigurableObject::Find(const string& rKeyword)
{
  ParameterIterator p = m_Configuration.begin();
  while(p != m_Configuration.end()) {
    CConfigurationParameter* pParam = *p;
    if(pParam->Match(rKeyword)) { 
      return p;
    }
    p++;
  }
  return m_Configuration.end();
}




void
CConfigurableObject::DeleteParameters()
{
  // Kill off the bool parameters.
  
  ParameterIterator p = m_Configuration.begin();
  while (p != m_Configuration.end()) {
    CConfigurationParameter *pParam = *p;
    delete pParam;
    p++;
  }
  while(m_Configuration.size()) {
    m_Configuration.erase(begin(), end());
  }
}

---