com.nomagic.magicdraw.evaluation

Interface Evaluator

All Known Subinterfaces:

BinaryEvaluator

@OpenApi
public interface Evaluator

A basic expression evaluator interface. Implementers should realize the method to evaluate expression

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(OpaqueExpression exp, Element object) Main entry method for expression evaluation.
java.lang.String	getExpressionCachingKey(OpaqueExpression exp) Calculates a string identifier of the expression.
boolean	isExpressionGlobal(OpaqueExpression exp) Determines if the supplied expression is "global", i.e.

Method Detail

evaluate

@OpenApi
java.lang.Object evaluate(OpaqueExpression exp,
                                   Element object)

Main entry method for expression evaluation. Takes expression, contextual object and produces result.

Parameters:

exp - expression to be called

object - contextual object of expression call

Returns:

expression evaluation result

isExpressionGlobal

@OpenApi
boolean isExpressionGlobal(OpaqueExpression exp)

Determines if the supplied expression is "global", i.e. if it needs contextual object to be evaluated. If expression does not need contextual object, then this expression is considered to be "global" or "static"

Parameters:

exp - expression to be inspected

Returns:

true if expression does not need the contextual object

getExpressionCachingKey

@OpenApi
java.lang.String getExpressionCachingKey(OpaqueExpression exp)

Calculates a string identifier of the expression. Expression evaluation results of objects are cached under this key return null if result should not be cached.

Parameters:

exp - expression, results of which are to be cached

Returns:

identifier of the expression