org.wso2.balana.cond

Class AbsFunction

java.lang.Object

org.wso2.balana.cond.FunctionBase

org.wso2.balana.cond.AbsFunction

All Implemented Interfaces:

Expression, Function

public class AbsFunction
extends FunctionBase

A class that implements all the *-abs functions. It takes one operand of the appropriate type and returns the absolute value of the operand. If the operand is indeterminate, an indeterminate result is returned.

Since:

1.0

Author:

Steve Hanna, Seth Proctor

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME_DOUBLE_ABS Standard identifier for the double-abs function.
static String	NAME_INTEGER_ABS Standard identifier for the integer-abs function.

Fields inherited from class org.wso2.balana.cond.FunctionBase

FUNCTION_NS, FUNCTION_NS_2, FUNCTION_NS_3

Constructor Summary

Constructors

Constructor and Description
AbsFunction(String functionName) Creates a new AbsFunction object.

Method Summary

Modifier and Type	Method and Description
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 org.wso2.balana.cond.FunctionBase

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

Methods inherited from class java.lang.Object

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

Field Detail

NAME_INTEGER_ABS

public static final String NAME_INTEGER_ABS

Standard identifier for the integer-abs function.

See Also:

Constant Field Values

NAME_DOUBLE_ABS

public static final String NAME_DOUBLE_ABS

Standard identifier for the double-abs function.

See Also:

Constant Field Values

Constructor Detail

AbsFunction

public AbsFunction(String functionName)

Creates a new AbsFunction object.

Parameters:

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

Throws:

IllegalArgumentException - if the function is known

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