org.wso2.balana.combine.xacml3

Class PermitUnlessDenyPolicyAlg

java.lang.Object

org.wso2.balana.combine.CombiningAlgorithm

org.wso2.balana.combine.PolicyCombiningAlgorithm

org.wso2.balana.combine.xacml3.PermitUnlessDenyPolicyAlg

public class PermitUnlessDenyPolicyAlg
extends PolicyCombiningAlgorithm

This is the standard Deny unless permit policy combining algorithm. This algorithm is intended for those cases where a deny decision should have priority over a permit decision, and an "Indeterminate" or "NotApplicable" must never be the result. It is particularly useful at the top level in a policy structure to ensure that a PDP will always return a definite "Permit" or "Deny" result.

Field Summary

Fields

Modifier and Type	Field and Description
static String	algId The standard URI used to identify this algorithm

Constructor Summary

Constructors

Constructor and Description
PermitUnlessDenyPolicyAlg() Standard constructor.
PermitUnlessDenyPolicyAlg(URI identifier) Constructor that takes the algorithm's identifier.

Method Summary

Modifier and Type	Method and Description
AbstractResult	combine(EvaluationCtx context, List parameters, List policyElements) Combines the policies based on the context to produce some unified result.

Methods inherited from class org.wso2.balana.combine.CombiningAlgorithm

getIdentifier

Methods inherited from class java.lang.Object

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

Field Detail

algId

public static final String algId

The standard URI used to identify this algorithm

See Also:

Constant Field Values

Constructor Detail

PermitUnlessDenyPolicyAlg

public PermitUnlessDenyPolicyAlg()

Standard constructor.

PermitUnlessDenyPolicyAlg

public PermitUnlessDenyPolicyAlg(URI identifier)

Constructor that takes the algorithm's identifier.

Parameters:

identifier - the algorithm's identifier

Method Detail

combine

public AbstractResult combine(EvaluationCtx context,
                              List parameters,
                              List policyElements)

Description copied from class: PolicyCombiningAlgorithm

Combines the policies based on the context to produce some unified result. This is the one function of a combining algorithm.

Note that unlike in the RuleCombiningAlgorithms, here you must explicitly match the sub-policies to make sure that you should consider them, and you must handle Obligations.

Specified by:

combine in class PolicyCombiningAlgorithm

Parameters:

context - the representation of the request

parameters - a (possibly empty) non-null List of CombinerParameters

policyElements - a List of CombinerElements

Returns:

a single unified result based on the combining logic