StringExampleTool.h File Reference

#include <AsgTools/AsgTool.h>
#include <AsgTools/PropertyWrapper.h>
#include <ColumnarCore/ColumnAccessor.h>
#include <ColumnarCore/ColumnarTool.h>
#include <ColumnarCore/ObjectColumn.h>
#include <ColumnarMet/MetDef.h>
#include <ColumnarCore/StringColumn.h>

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Functions
namespace	ADD_CMODE (columnar)

Function Documentation

ADD_CMODE()

namespace ADD_CMODE

(

columnar

)

Author

Nils Krumnack

an example of a columnar tool that reads a vector column

This illustrates how to read vector columns in a tool. The actual example is a bit arcane, but it hopefully illustrates how to read vector columns.

the pt cut to apply

the object accessor for the met map

This is equivalent to a ReadHandleKey in the xAOD world. It is used to access the met range/container for a given event.

a string column accessor

There is essentially just a single string column in PHYSLITE, so I'm going with that.

the selection decorator for the met terms

This is the equivalent to an AuxElement::Decorator in the xAOD world. One thing to note is that the tools generally run on many objects, not a a single object. So the tool doesn't have the option to return individual output values. Instead it needs to provide an output value per object, which in the columnar world is done by filling a column.

Definition at line 1 of file StringExampleTool.h.

{
 
  class StringExampleTool final
    : public asg::AsgTool,
      public columnar::ColumnarTool<>
  {
  public:
 
    // Create a proper constructor for Athena
    ASG_TOOL_CLASS( StringExampleTool, asg::IAsgTool )
 
    StringExampleTool (const std::string& name);
 
    virtual StatusCode initialize () override;
 
    virtual void callEvents (columnar::EventContextRange events) const override;
 

    Gaudi::Property<float> m_ptCut {this, "ptCut", 10e3, "pt cut (in MeV)"};
 

    columnar::MetAccessor<columnar::ObjectColumn> metAcc {*this, "Met"};
 

    columnar::MetAccessor<std::string> nameAcc {*this, "name"};
 

    columnar::MetDecorator<char> selectionDec {*this, "selection"};
  };
}