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#include <iostream>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <TSystem.h>
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#include <TObjString.h>
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#include <TKey.h>
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#include <TDirectory.h>
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#include <TClass.h>
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#include <TMath.h>
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#include "FileParser.h"
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#include "SHist.h"
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using namespace std;
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FileParser::FileParser()
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{
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m_file = NULL;
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m_hists = NULL;
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debug = false;
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m_do_cumulative = true;
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}
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FileParser::~FileParser()
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{
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if (m_file){
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CloseFile();
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}
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}
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void FileParser::CloseFile()
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{
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if (m_file){
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m_file->Close();
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delete m_file;
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m_file = NULL;
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}
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}
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bool FileParser::FileExists(TString filename)
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{
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struct stat buf;
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if (stat(filename.Data(), &buf) != -1)
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{
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return true;
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}
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return false;
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}
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void FileParser::OpenFile(TString fname, TString cyclename)
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{
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// open the root files with names given in the TObjArray
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if (m_file != NULL){
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cerr << "FileParser::OpenFile: Can not open new file, since file "
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<< m_file->GetName() << " is still in memory. Abort." << endl;
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exit(EXIT_FAILURE);
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}
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if (cyclename.Sizeof()!=0){
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TString Prefix(cyclename);
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Prefix.Append(".");
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fname.Prepend(Prefix);
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}
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// check if name consists of a wildcard, if so use hadd to combine histograms
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if (fname.Contains("*")){
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TString target(fname);
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target.ReplaceAll("*","");
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// check if target exists, delete if yes
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if (FileExists(target)){
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if (debug) cout << "Target exists, removing file " << target << endl;
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remove(target);
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}
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TString command = "hadd " + target + " " + fname;
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gSystem->Exec(command);
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fname = target;
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}
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if (debug) cout << "Opening file with name " << fname << "..." << endl;
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m_file = new TFile(fname, "READ");
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if (debug){
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cout << "... success! pointer = " << m_file << endl;
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cout << "name = " << m_file << endl;
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cout << " is open? " << m_file->IsOpen() << endl;
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m_file->ls();
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}
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if (!m_file->IsOpen()) {
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cout << endl << "FileParser: File " << fname << " does not exist!!!" << endl;
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exit(EXIT_FAILURE);
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} else { // success!
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cout << "FileParser: Successfully opened file " << fname << endl;
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}
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StoreProcessName(fname);
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// create a new TObjArray to store all histograms
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m_hists = new TObjArray();
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return;
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}
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void FileParser::StoreProcessName(TString name)
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{
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TObjArray* pieces = name.Tokenize(".");
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for (int i=0; i<pieces->GetEntries(); ++i){
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TString piece = ((TObjString*)pieces->At(i))->GetString();
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if (piece.CompareTo("root")==0){
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m_process = ((TObjString*)pieces->At(i-1))->GetString();
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if (debug) cout << "Process in file = " << m_process << endl;
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}
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}
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}
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TObjArray* FileParser::FindSubdirs()
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{
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// find all subdirectories (former histogram collections) in the open file
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// returns a TObjArray with the names of the subdirectories
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m_file->cd();
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TObjArray* dirnames = new TObjArray();
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TKey *key;
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TIter nextkey( gDirectory->GetListOfKeys() );
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while ( (key = (TKey*)nextkey())) {
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TObject *obj = key->ReadObj();
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if ( obj->IsA()->InheritsFrom( "TDirectory" ) ) { // found a subdirectory!
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TString dirname(((TDirectory*) obj)->GetName());
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dirnames->Add(new TObjString(dirname));
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if (debug) cout << "Found directory " << dirname << endl;
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}
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}
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return dirnames;
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}
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void FileParser::BrowseFile()
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{
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if (!m_file){
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cerr << "FileParser::BrowseFile: No file open. Abort." << endl;
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exit(EXIT_FAILURE);
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}
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TObjArray* dirs = FindSubdirs();
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// loop over all directories and get the histograms
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for (Int_t i=0; i<dirs->GetEntries(); ++i){
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TString dirname = ((TObjString*)dirs->At(i))->GetString();
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if (debug) cout << "Getting all histograms from directory " << dirname << endl;
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m_file->cd();
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gDirectory->Cd(dirname);
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// loop over all histograms in the directory and store them
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TKey *key;
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TIter nextkey( gDirectory->GetListOfKeys() );
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while ( (key = (TKey*)nextkey())) {
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TObject *obj = key->ReadObj();
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if ( obj->IsA()->InheritsFrom( TH1::Class() ) ) {
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// histogram found
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TH1* thist = (TH1*) obj;
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if (m_do_cumulative) MakeCumulativeHist(thist);
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TH1* rebinned = Rebin(thist, dirname);
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SHist* shist = NULL;
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if (rebinned){
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shist = new SHist(rebinned);
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} else {
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shist = new SHist(thist);
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}
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shist->SetProcessName(m_process);
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shist->SetDir(dirname);
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if (debug) cout << "Adding hist " << shist->GetHist()->GetName()
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<< " (process = " << m_process << ")" << endl;
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m_hists->Add(shist);
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}
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delete obj;
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}
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}
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return;
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}
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void FileParser::MakeCumulativeHist(TH1* hist)
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{
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for (Int_t i=1; i<hist->GetNbinsX()+1; ++i){
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Double_t sum = 0;
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Double_t sumw2 = 0;
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for (int j=i; j<hist->GetNbinsX()+1; ++j){
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sum += hist->GetBinContent(j);
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sumw2 += hist->GetSumw2()->At(j);
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}
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hist->SetBinContent(i, sum);
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hist->SetBinError(i, TMath::Sqrt(sumw2));
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}
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}
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TH1* FileParser::Rebin(TH1* hist, TString dirname)
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{
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TString name(hist->GetName());
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TString title(hist->GetTitle());
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if (name.CompareTo("pT")==0 && dirname.Contains("Electron") && title.Contains("electron")){
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//Double_t binsx[] = {0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 170, 180, 190, 200, 220, 240, 260, 280, 300, 350, 400, 500};
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Double_t binsx[] = {30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 170, 180, 190, 200, 220, 240, 260, 280, 300, 350, 400, 500};
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name.Append("_rebin_lx");
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TH1* rebinned = hist->Rebin(37, name, binsx);
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rebinned->SetTitle("electron P_{T} [GeV]");
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return rebinned;
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} else {
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return NULL;
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}
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}
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void FileParser::SetInfo(TString legname, double weight, int colour, int marker, float unc)
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{
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for (int i=0; i<m_hists->GetEntries(); ++i){
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SHist* sh = (SHist*)m_hists->At(i);
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sh->SetLegName(legname);
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sh->SetWeight(weight);
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sh->SetUnc(unc);
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if (weight>0) sh->GetHist()->Scale(weight);
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sh->GetHist()->SetMarkerColor(colour);
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sh->GetHist()->SetLineColor(colour);
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if (marker > 1 ){
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sh->SetDrawMarker(true);
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sh->GetHist()->SetMarkerStyle(marker);
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} else {
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sh->SetDrawMarker(false);
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sh->GetHist()->SetMarkerStyle(0);
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sh->GetHist()->SetMarkerSize(0);
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sh->GetHist()->SetLineWidth(2);
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}
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// histogram is transparent if marker < 0
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if (marker < 0 ){
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// change line style
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if (marker==-1) sh->GetHist()->SetLineStyle(kDashed);
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if (marker==-2) sh->GetHist()->SetLineStyle(kDotted);
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if (marker==-3) sh->GetHist()->SetLineStyle(kDashDotted);
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if (marker==-4) sh->GetHist()->SetLineStyle(kDashDotted);
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}
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}
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}
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