com.sun.xacml.cond
Class LogicalFunction

java.lang.Object
  com.sun.xacml.cond.FunctionBase
      com.sun.xacml.cond.LogicalFunction

All Implemented Interfaces:

Function

public class LogicalFunction

extends FunctionBase

A class that implements the logical functions "or" and "and". These functions take any number of boolean arguments and evaluate them one at a time, starting with the first argument. As soon as the result of the function can be determined, evaluation stops and that result is returned. During this process, if any argument evaluates to indeterminate, an indeterminate result is returned.

Since:

1.0

Field Summary

static String	NAME_AND Standard identifier for the and function.
static String	NAME_OR Standard identifier for the or function.

Fields inherited from class com.sun.xacml.cond.FunctionBase

FUNCTION_NS

Constructor Summary

LogicalFunction(String functionName)
Creates a new LogicalFunction object.

Method Summary

EvaluationResult	evaluate(List inputs, EvaluationCtx context) Evaluate the function, using the specified parameters.
static Set	getSupportedIdentifiers() Returns a Set containing all the function identifiers supported by this class.

Methods inherited from class com.sun.xacml.cond.FunctionBase

checkInputs, checkInputsNoBag, evalArgs, getFunctionId, getFunctionName, getIdentifier, getReturnType, getReturnTypeAsString, makeProcessingError, returnsBag

Methods inherited from class java.lang.Object

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

Field Detail

NAME_OR

public static final String NAME_OR

Standard identifier for the or function.

See Also:

Constant Field Values

NAME_AND

public static final String NAME_AND

Standard identifier for the and function.

See Also:

Constant Field Values

Constructor Detail

LogicalFunction

public LogicalFunction(String functionName)

Creates a new LogicalFunction object.

Parameters:

functionName - the standard XACML name of the function to be handled by this object, including the full namespace

Throws:

IllegalArgumentException - if the functionName is unknown

Method Detail

getSupportedIdentifiers

public static Set getSupportedIdentifiers()

Returns a Set containing all the function identifiers supported by this class.

Returns:

a Set of Strings

evaluate

public EvaluationResult evaluate(List inputs,
                                 EvaluationCtx context)

Evaluate the function, using the specified parameters.

Parameters:

inputs - a List of Evaluatable objects representing the arguments passed to the function

context - an EvaluationCtx so that the Evaluatable objects can be evaluated

Returns:

an EvaluationResult representing the function's result