Package org.ow2.authzforce.core.pdp.api.expression

Class Expressions

java.lang.Object

org.ow2.authzforce.core.pdp.api.expression.Expressions

public final class Expressions
extends Object

This class consists exclusively of constants and static methods to operate on Expressions.

Method Summary

Modifier and Type	Method	Description
static <V extends Value> V	eval(Expression<?> arg, EvaluationContext context, Datatype<V> returnType)	Evaluate single-valued (primitive) argument expression
static AttributeValue	evalPrimitive(Expression<?> arg, EvaluationContext context)	Evaluate single-valued (primitive) argument expression

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

eval

public static <V extends Value> V eval(Expression<?> arg,
                                       EvaluationContext context,
                                       Datatype<V> returnType)
                                throws IndeterminateEvaluationException

Evaluate single-valued (primitive) argument expression

Parameters:

arg - argument expression

context - context in which argument expression is evaluated

returnType - type of returned attribute value

Returns:

result of evaluation

Throws:

IndeterminateEvaluationException - if no value returned from evaluation, or returnType is not a supertype of the result value datatype

evalPrimitive

public static AttributeValue evalPrimitive(Expression<?> arg,
                                           EvaluationContext context)
                                    throws IndeterminateEvaluationException

Evaluate single-valued (primitive) argument expression

Parameters:

arg - argument expression

context - context in which argument expression is evaluated

Returns:

result of evaluation

Throws:

IndeterminateEvaluationException - if no value returned from evaluation, or returnType is not a supertype of the result value datatype