siena::predicate Class Reference

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

#include <types.h>

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

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

Detailed Description

interface of a generic predicate in the Siena data model.

A predicate is a set of filters representing a logical disjunctions of conjunctions of elementary conditions. Individual conjunctions can be accessed sequentially through a predicate::iterator.

Examples:

simple_types.cc.

Member Function Documentation

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

virtual

applies this predicate to a message.

This is a naive implementation of the matching function.

Returns

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

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

pure virtual

returns an iterator over this predicate.

Returns

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