TAO_Constraint_Interpreter Class Reference

TAO_Constraint_Interpreter will, given a constraint string whose syntax and semantics comply with the trader specification for the constraint language, determine if a CosTrading::Offer meets the constraints. More...

#include <Constraint_Interpreter.h>

Inheritance diagram for TAO_Constraint_Interpreter:

Collaboration diagram for TAO_Constraint_Interpreter:

Public Member Functions
	TAO_Constraint_Interpreter (const CosTradingRepos::ServiceTypeRepository::TypeStruct &ts, const char *constraints)
	TAO_Constraint_Interpreter (TAO_Constraint_Validator &validator, const char *constraints)
	~TAO_Constraint_Interpreter (void)
	Destructor. More...
CORBA::Boolean	evaluate (CosTrading::Offer *offer)
CORBA::Boolean	evaluate (TAO_Constraint_Evaluator &evaluator)

Additional Inherited Members
Protected Member Functions inherited from TAO_Interpreter
	TAO_Interpreter (void)
	Constructor. More...
	~TAO_Interpreter (void)
	Destructor. More...
int	build_tree (const char *preferences)
Static Protected Member Functions inherited from TAO_Interpreter
static int	is_empty_string (const char *str)
Protected Attributes inherited from TAO_Interpreter
TAO_Constraint *	root_

Detailed Description

TAO_Constraint_Interpreter will, given a constraint string whose syntax and semantics comply with the trader specification for the constraint language, determine if a CosTrading::Offer meets the constraints.

TAO_Constraint_Interpreter will first build an expression tree representing the constraint expression using Lex and Yacc. Then, using a TAO_Constraint_Validator, it will validate the semantic correctness of the tree. When the evaluate method is invoked with an Offer, the TAO_Constraint_Interpreter will construct an EvaluationVisitor, which will evaluate the tree and decide whether the offer meets the constraints.

Constructor & Destructor Documentation

TAO_Constraint_Interpreter::TAO_Constraint_Interpreter	(	const CosTradingRepos::ServiceTypeRepository::TypeStruct &	ts,
		const char *	constraints
	)

TAO_Constraint_Interpreter::TAO_Constraint_Interpreter	(	TAO_Constraint_Validator &	validator,
		const char *	constraints
	)

This constructor builds an expression tree representing the constraint specified in <constraints>, and throws an Illegal Constraint exception if the constraint given has syntax errors or semantic errors, such as mismatched types.

TAO_Constraint_Interpreter::~TAO_Constraint_Interpreter

(

void

)

Destructor.

Member Function Documentation

CORBA::Boolean TAO_Constraint_Interpreter::evaluate

(

CosTrading::Offer *

offer

)

CORBA::Boolean TAO_Constraint_Interpreter::evaluate

(

TAO_Constraint_Evaluator &

evaluator

)

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

• Constraint_Interpreter.h
• Constraint_Interpreter.cpp