ConfigEditor.cxx

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// $Id: ConfigEditor.cxx,v 1.2 2009/06/18 16:31:52 fmwk Exp $
//
//
// messier@indiana.edu
#include "Config/ConfigEditor.h"
#include "Config/Config.h"
#include "Config/Table.h"
#include "Config/Observer.h"
#include "Config/Exception.h"
#include <cstdlib>
extern "C" {
#include <unistd.h>
}

//......................................................................

cfg::ConfigEditor::ConfigEditor(cfg::Config* config) :
  fNewConfig ( false  ),
  fConfig    ( config ), 
  fConfigCopy( 0 )  
{ }

//......................................................................

cfg::ConfigEditor::~ConfigEditor() 
{
  //======================================================================
  // Free memory used during edit
  //======================================================================
  if (fConfigCopy) { delete fConfigCopy; fConfigCopy = 0; }
}

//......................................................................

void cfg::ConfigEditor::Edit() 
{
  //======================================================================
  // Actually do the edit
  //======================================================================
  
  // Test if the edit of the configuration is OK
  if (fConfig->EditOK()==false) return;
  
  // Make a copy of the configuration prior to any changes
  fConfigCopy = new cfg::Config(fConfig->GetName(),"dummy","dummy");
  cfg::Config::Copy(*fConfigCopy,
                    *fConfig,
                    fConfig->GetVersion(),
                    fConfig->GetSource());
  
  // Make the edit
  int apply = this->EditConfig(*fConfig);
  
  // Apply any changes
  if (apply==0) this->Cancel();
  else          this->Apply();
}

//......................................................................

int cfg::ConfigEditor::EditConfig(cfg::Config& /*cfg*/) 
{
  //======================================================================
  // User edit routine. Modify the configuration cfg.
  //======================================================================
  return 0; // Do not apply edits
  // return 1; // Apply edits
}

//......................................................................

void cfg::ConfigEditor::Apply() 
{
  //======================================================================
  // Apply the changes made to the configuration.
  //======================================================================
  cfg::Table& t = cfg::Table::Instance();
  
  // Insert the configuration into the table of configurations 
  if (fNewConfig) t.AdoptConfig(fConfig);
  
  // Alert observers of this configuration to the change it its
  // state
  cfg::Table::ObsList olist;
  t.GetObservers(fConfig->GetName(), fConfig->GetVersion(), olist);
  
  cfg::Table::ObsList::iterator    itr(olist.begin());
  cfg::Table::ObsList::iterator itrEnd(olist.end());
  for (; itr!=itrEnd; ++itr) try {(*itr)->Update(*fConfig); }
  catch (cfg::Exception e) {
    std::cout << " *-> " << fConfig->GetName() << "." 
              << fConfig->GetVersion() << " ";
    e.Print();
    exit(-1);
  }
}

//......................................................................

void cfg::ConfigEditor::Reset() 
{
  //======================================================================
  // Set the state of the configuration back to what it was prior to edit
  //======================================================================
  cfg::Config::Copy(*fConfig,
                    *fConfigCopy,
                    fConfigCopy->GetVersion(),
                    fConfigCopy->GetSource());
}

//......................................................................

void cfg::ConfigEditor::Cancel() 
{
  //======================================================================
  // Cancel the edit operation
  //======================================================================
  cfg::Config::Copy(*fConfig,
                    *fConfigCopy,
                    fConfigCopy->GetVersion(),
                    fConfigCopy->GetSource());
  if (fNewConfig) { delete fConfig; fConfig = 0; }
}

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