lsst::pex::logging::PropertyPrinter Class Reference

an class for printing the values associated with a name in a PropertySet. More...

#include <PropertyPrinter.h>

Public Types
typedef PrinterList::iterator	iterator

Public Member Functions
	PropertyPrinter (const lsst::daf::base::PropertySet &prop, const std::string &name, const PrinterFactory &fact=defaultPrinterFactory)
iterator	begin ()
iterator	last ()
size_t	valueCount ()

Static Public Attributes
static PrinterFactory	defaultPrinterFactory

Private Attributes
boost::shared_ptr< PrinterList >	_list

Detailed Description

an class for printing the values associated with a name in a PropertySet.

This class is vital if one needs to print out all the values in a PropertySet without knowing the data types associated with the names. In particular, it gives one the ability to write each value associated with a name individually and it any order. A typical use looks like this:

*   PropertySet ps;
*   std::vector<std::string>::iterator ni;
*   std::vector<std::string> names(ps.paramNames(true));
* 
*   for(ni = names.begin(); ni != names.end(); ++ni) {
*     PropertyPrinter pp(ps, *ni);
* 
*     for(PropertyPrinter::iterator i=pp.begin(); i.notAtEnd(); ++i) {
*       strm << *ni << ": ";
*       i.write(&strm) << endl;
*     }
*   }
* 

A PropertyPrinter is constructed for a particular name found in the PropertySet. (If a property with that name doesn't exist, a pex::exceptions::NotFoundError is thrown.) The PropertyPrinter is wrapped around the array of values associated with the name. One can get an Iterator for the values and send each one to a stream.

A PropertyPrinter can only print out property types that it has been configured for via the PrinterFactory instance that is passed in during construction. If one is not provided, a default is set which supports the following types:

*   short          char              float
*   int            signed char       double
*   long           unsigned char     bool
*   long long      string            DateTime
* 

Other types can be supported by passing the name of factory function that can create a printer instance to a PrinterFactory that will eventually be used with a PropertyPrinter (see PrinterFactory for details.

Definition at line 451 of file PropertyPrinter.h.

Member Typedef Documentation

typedef PrinterList::iterator lsst::pex::logging::PropertyPrinter::iterator

the iterator type used for iterating through values.

Definition at line 457 of file PropertyPrinter.h.

Constructor & Destructor Documentation

lsst::pex::logging::PropertyPrinter::PropertyPrinter	(	const lsst::daf::base::PropertySet &	prop,
		const std::string &	name,
		const PrinterFactory &	fact = defaultPrinterFactory
	)

create the PropertyPrinter for a given name

Member Function Documentation

iterator lsst::pex::logging::PropertyPrinter::begin

(

)

return an iterator set at the start of the list of values

iterator lsst::pex::logging::PropertyPrinter::last

(

)

return an iterator set at the last of the list of values

size_t lsst::pex::logging::PropertyPrinter::valueCount ( )

inline

return the number of values associated with the property

Definition at line 485 of file PropertyPrinter.h.

{ return _list.get()->valueCount(); }

Member Data Documentation

boost::shared_ptr<PrinterList> lsst::pex::logging::PropertyPrinter::_list

private

Definition at line 489 of file PropertyPrinter.h.

PrinterFactory lsst::pex::logging::PropertyPrinter::defaultPrinterFactory

static

the default look-up table for creating iterators for different types. Users are allowsd add new printers. See PropertyFactory for more details.

Definition at line 464 of file PropertyPrinter.h.

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

• /home/lsstsw/stack/Linux64/pex_logging/11.0+1/include/lsst/pex/logging/PropertyPrinter.h