ReadFromXmlDom Class Reference

#include <ReadFromXmlDom.h>

Inheritance diagram for ReadFromXmlDom:

Collaboration diagram for ReadFromXmlDom:

Public Member Functions
	ReadFromXmlDom ()
	ReadFromXmlDom (const std::string &source)
std::string	source () const final
std::string	format () const final
bool	histoDefinitionMap (std::map< std::string, SingleHistogramDefinition > &usersMap) const final
bool	insertDefinition (const SingleHistogramDefinition &oneDefinition)
bool	initialize () final
bool	sourceExists () const final

Static Private Member Functions
static SingleHistogramDefinition	parseTextLine (const std::string &line)
static SingleHistogramDefinition	parseTProfileText (const std::string &line)
static SingleHistogramDefinition	parseXmlElement (const xercesc::DOMElement *element)

Private Attributes
std::vector< SingleHistogramDefinition >	m_vectorOfDefinitions
std::string	m_source
const std::string	m_format
std::map< std::string, SingleHistogramDefinition >	m_histoDefinitionMap

Detailed Description

Definition at line 31 of file ReadFromXmlDom.h.

Constructor & Destructor Documentation

ReadFromXmlDom() [1/2]

ReadFromXmlDom::ReadFromXmlDom

(

)

Definition at line 43 of file ReadFromXmlDom.cxx.

                               : m_source("unspecified file"), m_format("text/xml") {
}

ReadFromXmlDom() [2/2]

ReadFromXmlDom::ReadFromXmlDom

(

const std::string &

source

)

Definition at line 46 of file ReadFromXmlDom.cxx.

                                                      :
  m_source (PathResolver::find_file(source, "DATAPATH")),
  m_format("text/xml")
{
}

Member Function Documentation

format()

std::string ReadFromXmlDom::format ( ) const

finalvirtual

Implements IReadHistoDef.

Definition at line 58 of file ReadFromXmlDom.cxx.

                             {
  return m_format;
}

histoDefinitionMap()

bool ReadFromXmlDom::histoDefinitionMap ( std::map< std::string, SingleHistogramDefinition > & usersMap ) const

finalvirtual

Implements IReadHistoDef.

Definition at line 63 of file ReadFromXmlDom.cxx.

                                                                                               {
  bool ok(true);
 
  for (const auto& i:m_vectorOfDefinitions) {
    if (i.empty()) {
      continue;
    }
    if (not i.validType()) {
      continue;
    }
    bool thisIsOk = (usersmap.insert(std::pair<std::string, SingleHistogramDefinition>(i.stringIndex(), i))).second;
    if (not thisIsOk) {
      ok &= thisIsOk;
      std::string msg = "You have attempted to add a duplicate histogram definition: " + i.stringIndex();
      throw std::runtime_error(msg);
    }
  }
  return(ok and(not usersmap.empty()));
}

initialize()

bool ReadFromXmlDom::initialize ( )

finalvirtual

Implements IReadHistoDef.

Definition at line 92 of file ReadFromXmlDom.cxx.

                           {
  bool ok(true);
 
  if (m_source.empty() or(not sourceExists())) {
    std::cerr << "Could not open file " << m_source << " in ReadFromXmlDom initialize" << std::endl;
    return false;
  }
  myXerces::Lib xercesFrame; // RAII xerces context
  static const XMLCh gLS[] = {
    xercesc::chLatin_L, xercesc::chLatin_S, xercesc::chNull
  };
  xercesc::DOMImplementation* impl = xercesc::DOMImplementationRegistry::getDOMImplementation(gLS);
  xercesc::DOMLSParser* parser = static_cast<xercesc::DOMImplementationLS*> (impl)->createLSParser(
    xercesc::DOMImplementationLS::MODE_SYNCHRONOUS, nullptr);
  xercesc::DOMConfiguration* config = parser->getDomConfig();
  if (config->canSetParameter(xercesc::XMLUni::fgXercesDoXInclude, true)) {
    config->setParameter(xercesc::XMLUni::fgXercesDoXInclude, true);
  }
  XIncludeErrHandler errorHandler;
  config->setParameter(xercesc::XMLUni::fgDOMErrorHandler, &errorHandler);
  auto *doc = parser->parseURI(m_source.c_str());
  const XercesString temp = fromNative("h");
  xercesc::DOMNodeList* list = doc->getElementsByTagName(temp.c_str());
  const auto nElements = list->getLength();
  for (unsigned long i(0); i != nElements; ++i) {
    xercesc::DOMNode const* thisNode = list->item(i);
    const auto *thisElement = dynamic_cast<xercesc::DOMElement const*> (thisNode);
    if (thisElement) {
      insertDefinition(parseXmlElement(thisElement));
    }
  }
  parser->release();
  return ok;
}

insertDefinition()

bool ReadFromXmlDom::insertDefinition ( const SingleHistogramDefinition & oneDefinition )

virtual

Implements IReadHistoDef.

Definition at line 84 of file ReadFromXmlDom.cxx.

                                                                               {
  bool ok(true);
 
  m_vectorOfDefinitions.push_back(oneDefinition);
  return ok;
}

parseTextLine()

SingleHistogramDefinition ReadFromXmlDom::parseTextLine ( const std::string & line )

staticprivate

Definition at line 238 of file ReadFromXmlDom.cxx.

                                                   {
  SingleHistogramDefinition s;
  enum RegXHistoGroups {
    TOTAL, TITLE, NBINS, XLO, XHI, XAXIS, YAXIS, DUMMY, FOLDER, NGROUPS
  };
 
  std::string rex =
    R"delim(^\s+"([^"]+)"\s+(\d+)\s+([-+.0-9eE]+)\s+([-+.0-9eE]+)\s+"([^"]+)"\s+"([^"]+)"\s*(.*)\s*$)delim";
  std::regex reg(rex);
  std::smatch m;
 
  if (std::regex_match(line, m, reg)) {
    const bool hasFolder = (m.size() == NGROUPS);
    s.title = m[TITLE].str();
    s.xTitle = m[XAXIS].str();
    s.yTitle = m[YAXIS].str();
    s.xAxis = IHistogramDefinitionSvc::axesLimits_t(std::stof(m[XLO].str()), std::stof(m[XHI].str()));
    s.nBinsX = std::stoi(m[NBINS].str());
    if (hasFolder) {
      s.folder = m[FOLDER].str();
    }
  }
  s.m_empty = false;
  return s;
}

parseTProfileText()

SingleHistogramDefinition ReadFromXmlDom::parseTProfileText ( const std::string & line )

staticprivate

Definition at line 265 of file ReadFromXmlDom.cxx.

                                                       {
  SingleHistogramDefinition s;
  enum RegXHistoGroups {
    TOTAL, TITLE, NBINS, XLO, XHI, YLO, YHI, XAXIS, YAXIS, DUMMY, FOLDER, NGROUPS
  };
 
  // text like: "Test of TProfile" 20 -50 50 0 200 "#eta"  "testEntries"
  std::string rex =
    R"delim(^\s+"([^"]+)"\s+(\d+)\s+([-+.0-9eE]+)\s+([-+.0-9eE]+)\s+([-+.0-9eE]+)\s+([-+.0-9eE]+)\s+"([^"]+)"\s+"([^"]+)"\s*(.*)\s*$)delim";
  std::regex reg(rex);
  std::smatch m;
 
  if (std::regex_match(line, m, reg)) {
    const bool hasFolder = (m.size() == NGROUPS);
    s.title = m[TITLE].str();
    s.xTitle = m[XAXIS].str();
    s.yTitle = m[YAXIS].str();
    s.xAxis = IHistogramDefinitionSvc::axesLimits_t(std::stof(m[XLO].str()), std::stof(m[XHI].str()));
    s.yAxis = IHistogramDefinitionSvc::axesLimits_t(std::stof(m[YLO].str()), std::stof(m[YHI].str()));
    s.nBinsX = std::stoi(m[NBINS].str());
    if (hasFolder) {
      s.folder = m[FOLDER].str();
    }
  }
  s.m_empty = false;
  return s;
}

parseXmlElement()

SingleHistogramDefinition ReadFromXmlDom::parseXmlElement ( const xercesc::DOMElement * element )

staticprivate

Definition at line 135 of file ReadFromXmlDom.cxx.

                                                                {
  SingleHistogramDefinition s;
  enum RegXHistoGroups {
    TYPE, NAME, TITLE, NX, NY, NZ, XLO, YLO, ZLO, XHI, YHI, ZHI, XAXIS, YAXIS, ZAXIS, FOLDER, NGROUPS
  };
  const std::array<std::string, NGROUPS> attrNames = {
    "type", "id", "title", "n", "n", "n", "lo", "lo", "lo", "hi", "hi", "hi", "title", "title", "title", "folder"
  };
  //
  // transform the std::string attribute names to Xerces string attribute names
  std::array<XercesString, NGROUPS> xercesNames;
  std::transform(attrNames.begin(), attrNames.end(), xercesNames.begin(), [](const std::string& s) {
    return fromNative(s);
  });
  // Use this array to store the primary returned attribute values, which will be Xerces strings
  std::array<XercesString, NGROUPS> xercesValues;
  //
  constexpr unsigned int NAXES = 3; // allow only three axes, could be extended later
  const std::array<std::string, NAXES> allowedAxisNames = {
    "x", "y", "z"
  };
 
  //
  xercesValues[NAME] = element->getAttribute(xercesNames[NAME].c_str());
  xercesValues[TITLE] = element->getAttribute(xercesNames[TITLE].c_str());
  xercesValues[TYPE] = element->getAttribute(xercesNames[TYPE].c_str());
  xercesValues[FOLDER] = element->getAttribute(xercesNames[FOLDER].c_str());
  const std::string type = toNative(xercesValues[TYPE]);
  const bool isTProfile = (type == "TProfile");
  // get children of the histogram, these are the two axes
  const xercesc::DOMElement* axisDef0 = element->getFirstElementChild();
  if (!axisDef0 and element->hasChildNodes()) {
    XercesString xercesContent = element->getTextContent();
    const std::string textContent = toNative(xercesContent);
    if (textContent.empty()) {
      return s;
    }
    SingleHistogramDefinition sx = isTProfile ? parseTProfileText(textContent) : parseTextLine(textContent);
    sx.name = toNative(xercesValues[NAME]);
    sx.histoType = std::move(type);
    return sx;
  }
  //if get to here and axisDef0 is null, theres a problem
  if (not axisDef0) return s;
  const xercesc::DOMElement* axisDef1 = axisDef0->getNextElementSibling();
  if (not axisDef1) return s; //no y axis, abort
  // but could be ordered x-y or y-x. The following assumes x, y, z ordering for now.
  std::string axisName0 = toNative(axisDef0->getTagName());
  std::string axisName1 = toNative(axisDef1->getTagName());
  const xercesc::DOMElement* axisDef2 = axisDef1->getNextElementSibling();
  std::string axisName2 = axisDef2 ? toNative(axisDef2->getTagName()) : "z";
  if (validAxisName(axisName0, allowedAxisNames) 
   and validAxisName(axisName1,allowedAxisNames) 
   and validAxisName(axisName2,allowedAxisNames)
   and (axisName1 != axisName0) and (axisName2 != axisName1)) {
    // default order
    unsigned int xIndex = 0, yIndex = 1, zIndex = 2;
    if (axisName0 == allowedAxisNames[1]) {
      // inverted order
      xIndex = 1;
      yIndex = 0;
    }
    xercesValues[NX + xIndex] = axisDef0->getAttribute(xercesNames[NX + xIndex].c_str());
    xercesValues[NX + yIndex] = axisDef1->getAttribute(xercesNames[NX + yIndex].c_str());
    xercesValues[NX + zIndex] = axisDef2 ? axisDef2->getAttribute(xercesNames[NX + zIndex].c_str()) : XercesString();
    xercesValues[XLO + xIndex] = axisDef0->getAttribute(xercesNames[XLO + xIndex].c_str());
    xercesValues[XLO + yIndex] = axisDef1->getAttribute(xercesNames[XLO + yIndex].c_str());
    xercesValues[XLO + zIndex] = axisDef2 ? axisDef2->getAttribute(xercesNames[XLO + zIndex].c_str()) : XercesString();
    xercesValues[XHI + xIndex] = axisDef0->getAttribute(xercesNames[XHI + xIndex].c_str());
    xercesValues[XHI + yIndex] = axisDef1->getAttribute(xercesNames[XHI + yIndex].c_str());
    xercesValues[XHI + zIndex] = axisDef2 ? axisDef2->getAttribute(xercesNames[XHI + zIndex].c_str()) : XercesString();
    xercesValues[XAXIS + xIndex] = axisDef0->getAttribute(xercesNames[XAXIS + xIndex].c_str());
    xercesValues[XAXIS + yIndex] = axisDef1->getAttribute(xercesNames[XAXIS + yIndex].c_str());
    xercesValues[XAXIS + zIndex] = axisDef2 ? axisDef2->getAttribute(xercesNames[XAXIS + zIndex].c_str()) : XercesString();
    // transform Xerces strings to normal std::string
    std::array<std::string, NGROUPS> stringValues {
      ""
    };
    std::transform(xercesValues.begin(), xercesValues.end(), stringValues.begin(), [](const XercesString& s) {
      return toNative(s);
    });
    // numerical values are required for some quantities
    const float NaN = std::nanf(""); // default 'invalid' float is not-a-number (NaN)
    const unsigned int nx = stringValues[NX].empty() ? 0 : (unsigned int) (std::stoul(stringValues[NX]));
    const unsigned int ny = stringValues[NY].empty() ? 0 : (unsigned int) (std::stoul(stringValues[NY]));
    const unsigned int nz = stringValues[NZ].empty() ? 0 : (unsigned int) (std::stoul(stringValues[NZ]));
    const float xlo = stringValues[XLO].empty() ? NaN : std::stof(stringValues[XLO]);
    const float ylo = stringValues[YLO].empty() ? NaN : std::stof(stringValues[YLO]);
    const float zlo = stringValues[ZLO].empty() ? NaN : std::stof(stringValues[ZLO]);
    const float xhi = stringValues[XHI].empty() ? NaN : std::stof(stringValues[XHI]);
    const float yhi = stringValues[YHI].empty() ? NaN : std::stof(stringValues[YHI]);
    const float zhi = stringValues[ZHI].empty() ? NaN : std::stof(stringValues[ZHI]);
    // now build the histogram definition to return
    SingleHistogramDefinition sx(stringValues[NAME], stringValues[TYPE], stringValues[TITLE], 
                 nx, ny, nz, xlo, xhi, ylo, yhi, zlo, zhi,
                 stringValues[XAXIS], stringValues[YAXIS], stringValues[ZAXIS],
                                 stringValues[FOLDER]);
    return sx;
  }
  return s;
}

source()

std::string ReadFromXmlDom::source ( ) const

finalvirtual

Implements IReadHistoDef.

Definition at line 53 of file ReadFromXmlDom.cxx.

                             {
  return m_source;
}

sourceExists()

bool ReadFromXmlDom::sourceExists ( ) const

finalvirtual

Implements IReadHistoDef.

Definition at line 128 of file ReadFromXmlDom.cxx.

                                   {
  struct stat buffer{};
 
  return(stat(m_source.c_str(), &buffer) == 0);
}

Member Data Documentation

m_format

const std::string ReadFromXmlDom::m_format

private

Definition at line 44 of file ReadFromXmlDom.h.

m_histoDefinitionMap

std::map<std::string, SingleHistogramDefinition> IReadHistoDef::m_histoDefinitionMap

privateinherited

Definition at line 29 of file IReadHistoDef.h.

m_source

std::string ReadFromXmlDom::m_source

private

Definition at line 43 of file ReadFromXmlDom.h.

m_vectorOfDefinitions

std::vector<SingleHistogramDefinition> ReadFromXmlDom::m_vectorOfDefinitions

private

Definition at line 42 of file ReadFromXmlDom.h.

---

The documentation for this class was generated from the following files:

• ReadFromXmlDom.h
• ReadFromXmlDom.cxx