siena::filter Class Reference

interface of a generic filter in the Siena data model. More...

#include <types.h>

Inheritance diagram for siena::filter:

Classes
class	iterator
	interface of a generic filter iterator. More...

Public Member Functions
virtual	~filter ()
	virtual destructor
virtual iterator *	first () const =0
	returns an iterator over this filter. More...
virtual bool	covers (const message &m) const
	applies this filter to a message. More...

Detailed Description

interface of a generic filter in the Siena data model.

A filter is a set of constraint representing a logical conjunction of elementary conditions. Individual constraints can be accessed sequentially through a filter::iterator.

Examples:

simple_types.cc.

Member Function Documentation

virtual bool siena::filter::covers ( const message &  m ) const

virtual

applies this filter to a message.

This is a naive implementation of the matching function.

Returns

true iff this filter matches (i.e., covers) the given message.

virtual iterator* siena::filter::first ( ) const

pure virtual

returns an iterator over this filter.

Returns

iterator pointing to the first constraint in this filter, or NULL if this filter is empty.