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

Interface FirstOrderFunctionCall<RETURN extends Value>

Type Parameters:

RETURN - function return type

All Superinterfaces:

FunctionCall<RETURN>

All Known Implementing Classes:

BaseFirstOrderFunctionCall, BaseFirstOrderFunctionCall.EagerBagEval, BaseFirstOrderFunctionCall.EagerEval, BaseFirstOrderFunctionCall.EagerMultiPrimitiveTypeEval, BaseFirstOrderFunctionCall.EagerPartlyBagEval, BaseFirstOrderFunctionCall.EagerSinglePrimitiveTypeEval

public interface FirstOrderFunctionCall<RETURN extends Value>
extends FunctionCall<RETURN>

First-order function call. It is the recommended way of calling any FirstOrderFunction instance.

Some of the arguments (expressions) may not be known in advance, but only at evaluation time (when calling evaluate(EvaluationContext, boolean, AttributeValue...)). For example, when using a FirstOrderFunction as a sub-function of the Higher-Order function 'any-of', the last arguments of the sub-function are determined during evaluation, after evaluating the expression of the last input in the context, and getting the various values in the result bag.

Method Summary

Modifier and Type	Method	Description
RETURN	evaluate(EvaluationContext context, boolean checkRemainingArgTypes, AttributeValue... remainingArgs)	Make the call in a given evaluation context.
RETURN	evaluate(EvaluationContext context, AttributeValue... remainingArgs)	Make the call in a given evaluation context and argument values resolved at evaluation time.

Methods inherited from interface org.ow2.authzforce.core.pdp.api.func.FunctionCall

evaluate, getReturnType

Method Detail

evaluate

RETURN evaluate(EvaluationContext context,
                AttributeValue... remainingArgs)
         throws IndeterminateEvaluationException

Make the call in a given evaluation context and argument values resolved at evaluation time. This method is called by evaluate(EvaluationContext, boolean, AttributeValue...) after checking evaluation-time args.

Parameters:

context - evaluation context

remainingArgs - remaining args (not yet known at initialization time). Null if none. Only non-bag/primitive values are valid remainingArgs to prevent varargs warning (potential heap pollution via varargs parameter) that would be caused by using a parameterized type such as Value/Collection to represent both bags and primitives.

Returns:

result of the call

Throws:

IndeterminateEvaluationException - if any error evaluating the function

evaluate

RETURN evaluate(EvaluationContext context,
                boolean checkRemainingArgTypes,
                AttributeValue... remainingArgs)
         throws IndeterminateEvaluationException

Make the call in a given evaluation context. This method calls the function after checking remainingArgTypes if checkremainingArgTypes = true

Parameters:

context - evaluation context

checkRemainingArgTypes - whether to check types of remainingArgs. It is strongly recommended to set this to true always, unless you have already checked the types are OK before calling this method and want to skip re-checking for efficiency.

remainingArgs - remaining args.

Returns:

result of the call

Throws:

IndeterminateEvaluationException - if checkremainingArgTypes = true and remainingArgs do not check OK, or if they do but there was an error evaluating the function with such arguments