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cond::BlobReader Class Reference

#include <IOPool/CMSSealPlugins/plugins/PrimitivesContainerStreamer.h>

List of all members.

Public Member Functions
	BlobReader (const ROOT::Reflex::Type &type)
	Constructor.
void	read (const coral::Blob &blobData, void *containerAddress) const
	Reads an object from a Blob and returns the starting address of the object.
virtual	~BlobReader ()
	Empty destructor.
Private Attributes
ROOT::Reflex::Type	m_type
	The type.

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Detailed Description

Definition at line 31 of file PrimitivesContainerStreamer.h.

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Constructor & Destructor Documentation

cond::BlobReader::BlobReader

(

const ROOT::Reflex::Type &

type

)

Constructor.

Definition at line 63 of file PrimitivesContainerStreamer.cc.

                                                      :
  m_type( type )
{}

cond::BlobReader::~BlobReader

(

)

[virtual]

Empty destructor.

Definition at line 68 of file PrimitivesContainerStreamer.cc.

{}

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Member Function Documentation

void cond::BlobReader::read	(	const coral::Blob &	blobData,
		void *	containerAddress
	)			const

Reads an object from a Blob and returns the starting address of the object.

Definition at line 73 of file PrimitivesContainerStreamer.cc.

References Exception, m_type, and v.

{
  //std::cout<<"cond::BlobReader::read"<<std::endl;
  const void * srcstartingAddress=blobData.startingAddress();
  //std::cout<<"srcstartingAddress "<<srcstartingAddress<<std::endl;
  //std::cout<<"dest Address "<<containerAddress<<std::endl;
  long bsize=blobData.size();
  if(bsize==0){
    //std::cout<<"empty blob to read"<<std::endl;
    return;
  }
  //std::cout<<"blob size "<<bsize<<std::endl;
  ROOT::Reflex::Member clearMethod = m_type.MemberByName( "clear" );
  if ( ! clearMethod )
    throw cond::Exception( "BlobReader::read Could not retrieve the clear method of the container" );
  ROOT::Reflex::Object containerObject( m_type, containerAddress );
  // Clear the container
  clearMethod.Invoke( containerObject );
  //const ROOT::Reflex::Type signature();
  ROOT::Reflex::Member resizeMethod = m_type.MemberByName( "resize",ROOT::Reflex::Type::ByName("void (size_t)") );
  if ( ! resizeMethod )
    throw cond::Exception( "BlobReader::read Could not retrieve the resize method of the container" );
  // resize the container
  //size_t nargs=m_type.TemplateArgumentSize();
  //std::cout<<"template arguments to vector "<<nargs<<std::endl;
  size_t elementSize=m_type.TemplateArgumentAt(0).SizeOf();
  //std::cout<<"elementSize "<<elementSize<<std::endl;
  std::vector<void *> v(1);
  size_t containerSize = bsize / elementSize;
  //std::cout<<" container size "<<containerSize<<std::endl;
  //std::cout<<" container size address "<<(void*)(&containerSize)<<std::endl;
  /*for(size_t i=0; i<containerSize; ++i){
    containerObject.Invoke("push_back", 0); //hack!!
  }
  */
  v[0] = (void*)(&containerSize);
  //int temp=0;
  //v[1] = (void*)(&temp);
  //v.push_back((void*)(&containerSize));
  //std::cout<<resizeMethod.Name()<<std::endl;
  resizeMethod.Invoke( containerObject,v );
  // Create an iterator
  ROOT::Reflex::Member beginMethod = m_type.MemberByName( "begin" );
  if ( ! beginMethod )
    throw cond::Exception( "BlobReader::read No begin method is defined for the container" );
  ROOT::Reflex::Object iteratorObject = beginMethod.Invoke( ROOT::Reflex::Object( m_type, const_cast< void * > ( containerAddress ) ) );
  ROOT::Reflex::Type iteratorType = beginMethod.TypeOf().ReturnType();
  //get first element address
  ROOT::Reflex::Member dereferenceMethod = iteratorType.MemberByName( "operator*" );
  if ( ! dereferenceMethod )
    throw cond::Exception( "BlobReader::read Could not retrieve the dereference method of the container's iterator" );
  void* elementAddress = dereferenceMethod.Invoke( iteratorObject ).Address();
  ::memcpy( elementAddress, srcstartingAddress, (size_t)bsize);
  //std::cout<<"memcpy"<<std::endl;
  iteratorObject.Destruct();
}

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Member Data Documentation

ROOT::Reflex::Type cond::BlobReader::m_type [private]

The type.

Definition at line 45 of file PrimitivesContainerStreamer.h.

Referenced by read().

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

• IOPool/CMSSealPlugins/plugins/PrimitivesContainerStreamer.h
• IOPool/CMSSealPlugins/plugins/PrimitivesContainerStreamer.cc

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