xdi2.core.features.policy.operator

Class Operator

java.lang.Object

xdi2.core.features.policy.operator.Operator

All Implemented Interfaces:

Serializable, Comparable<Operator>

Direct Known Subclasses:

ConditionOperator

public abstract class Operator
extends Object
implements Serializable, Comparable<Operator>

An XDI operator, represented as a relation.

Author:

markus

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Operator.MappingRelationOperatorIterator

Field Summary

Fields

Modifier and Type	Field and Description
protected Relation	relation

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Operator(Relation relation)

Method Summary

Modifier and Type	Method and Description
static Operator	castOperator(Operator operator) Factory method that casts an Operator to the right subclass, e.g. to a TruePolicyStatement.
int	compareTo(Operator other)
boolean	equals(Object object)
boolean[]	evaluate(PolicyEvaluationContext policyEvaluationContext) Checks if the XDI policy statement evaluates to true or false.
protected abstract boolean[]	evaluateInternal(PolicyEvaluationContext policyEvaluationContext)
static Operator	fromRelation(Relation relation) Factory method that creates an XDI operator bound to a given relation.
Relation	getRelation() Returns the underlying relation to which this XDI policy statement is bound.
int	hashCode()
static boolean	isValid(Relation relation) Checks if a relation is a valid XDI policy statement.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

relation

protected Relation relation

Constructor Detail

Operator

protected Operator(Relation relation)

Method Detail

isValid

public static boolean isValid(Relation relation)

Checks if a relation is a valid XDI policy statement.

Parameters:

relation - The relation to check.

Returns:

True if the relation is a valid XDI policy statement.

fromRelation

public static Operator fromRelation(Relation relation)

Factory method that creates an XDI operator bound to a given relation.

Parameters:

relation - The relation that is an XDI operator.

Returns:

The XDI operator.

castOperator

public static Operator castOperator(Operator operator)

Factory method that casts an Operator to the right subclass, e.g. to a TruePolicyStatement.

Parameters:

operator - The Operator to be cast.

Returns:

The casted Operator.

getRelation

public Relation getRelation()

Returns the underlying relation to which this XDI policy statement is bound.

Returns:

A relation that represents the XDI policy statement.

evaluate

public final boolean[] evaluate(PolicyEvaluationContext policyEvaluationContext)

Checks if the XDI policy statement evaluates to true or false.

Parameters:

policyEvaluationContext - An object that can locate context nodes.

Returns:

True or false.

evaluateInternal

protected abstract boolean[] evaluateInternal(PolicyEvaluationContext policyEvaluationContext)

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object object)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

compareTo

public int compareTo(Operator other)

Specified by:

compareTo in interface Comparable<Operator>