lhef::LHEReader Class Reference

#include <LHEReader.h>

Classes
class	FileSource
class	Source
class	XMLHandler

Public Member Functions
	LHEReader (const edm::ParameterSet &params)
	LHEReader (const std::vector< std::string > &fileNames, unsigned int skip=0)
boost::shared_ptr< LHEEvent >	next ()
	~LHEReader ()

Private Attributes
std::auto_ptr< XMLDocument >	curDoc
unsigned int	curIndex
boost::shared_ptr< LHERunInfo >	curRunInfo
std::auto_ptr< Source >	curSource
const std::vector< std::string >	fileURLs
unsigned int	firstEvent
std::auto_ptr< XMLHandler >	handler
int	maxEvents

Detailed Description

Definition at line 18 of file LHEReader.h.

Constructor & Destructor Documentation

lhef::LHEReader::LHEReader

(

const edm::ParameterSet &

params

)

Definition at line 287 of file LHEReader.cc.

                                                  :
    fileURLs(params.getUntrackedParameter< std::vector<std::string> >("fileNames")),
    firstEvent(params.getUntrackedParameter<unsigned int>("skipEvents", 0)),
    maxEvents(params.getUntrackedParameter<int>("limitEvents", -1)),
    curIndex(0), handler(new XMLHandler())
{
}

lhef::LHEReader::LHEReader	(	const std::vector< std::string > &	fileNames,
		unsigned int	skip = 0
	)

Definition at line 295 of file LHEReader.cc.

                                              :
    fileURLs(fileNames), firstEvent(firstEvent), maxEvents(-1),
    curIndex(0), handler(new XMLHandler())
{
}

lhef::LHEReader::~LHEReader

(

)

Definition at line 302 of file LHEReader.cc.

{
}

Member Function Documentation

boost::shared_ptr< LHEEvent > lhef::LHEReader::next

(

void

)

Definition at line 306 of file LHEReader.cc.

References lhef::LHERunInfo::addHeader(), curDoc, curIndex, curRunInfo, curSource, runTheMatrix::data, event(), fileURLs, firstEvent, handler, lhef::LHEReader::XMLHandler::kComment, lhef::LHEReader::XMLHandler::kEvent, lhef::LHEReader::XMLHandler::kHeader, lhef::LHEReader::XMLHandler::kInit, lhef::LHEReader::XMLHandler::kNone, and maxEvents.

{
    while(curDoc.get() || curIndex < fileURLs.size()) {
        if (!curDoc.get()) {
            curSource.reset(new FileSource(fileURLs[curIndex++]));
            handler->reset();
            curDoc.reset(curSource->createReader(*handler));
            curRunInfo.reset();
        }

        XMLHandler::Object event = handler->gotObject;
        handler->gotObject = XMLHandler::kNone;

        std::istringstream data;
        if (event != XMLHandler::kNone) {
            data.str(handler->buffer);
            handler->buffer.clear();
        }

        switch(event) {
            case XMLHandler::kNone:
            if (!curDoc->parse())
                curDoc.reset();
            break;

            case XMLHandler::kHeader:
            break;

            case XMLHandler::kInit:
            curRunInfo.reset(new LHERunInfo(data));
            
            std::for_each(handler->headers.begin(),
                          handler->headers.end(),
                          boost::bind(&LHERunInfo::addHeader,
                                      curRunInfo.get(), _1));
            handler->headers.clear();
            break;

            case XMLHandler::kComment:
            break;

            case XMLHandler::kEvent:
            if (!curRunInfo.get())
                throw cms::Exception("InvalidState")
                    << "Got LHE event without"
                       " initialization." << std::endl;

            if (firstEvent > 0) {
                firstEvent--;
                continue;
            }

            if (maxEvents == 0)
                return boost::shared_ptr<LHEEvent>();
            else if (maxEvents > 0)
                maxEvents--;

            return boost::shared_ptr<LHEEvent>(
                    new LHEEvent(curRunInfo, data));
        }
    }

    return boost::shared_ptr<LHEEvent>();
}

Member Data Documentation

std::auto_ptr<XMLDocument> lhef::LHEReader::curDoc

private

Definition at line 38 of file LHEReader.h.

Referenced by next().

unsigned int lhef::LHEReader::curIndex

private

Definition at line 35 of file LHEReader.h.

Referenced by next().

boost::shared_ptr<LHERunInfo> lhef::LHEReader::curRunInfo

private

Definition at line 39 of file LHEReader.h.

Referenced by next().

std::auto_ptr<Source> lhef::LHEReader::curSource

private

Definition at line 37 of file LHEReader.h.

Referenced by next().

const std::vector<std::string> lhef::LHEReader::fileURLs

private

Definition at line 30 of file LHEReader.h.

Referenced by next().

unsigned int lhef::LHEReader::firstEvent

private

Definition at line 33 of file LHEReader.h.

Referenced by next().

std::auto_ptr<XMLHandler> lhef::LHEReader::handler

private

Definition at line 40 of file LHEReader.h.

Referenced by next().

int lhef::LHEReader::maxEvents

private

Definition at line 34 of file LHEReader.h.

Referenced by next().