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com.sun.xacml.attr
Class BagAttribute  

java.lang.Object
  com.sun.xacml.attr.AttributeValue
      com.sun.xacml.attr.BagAttribute

All Implemented Interfaces:

com.sun.xacml.cond.Evaluatable

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public class BagAttribute

extends AttributeValue

Represents a bag used in the XACML spec as return values from functions and designators/selectors that provide more than one value. All values in the bag are of the same type, and the bag may be empty. The bag is immutable, although its contents may not be.

NOTE: This is the one standard attribute type that can't be created from the factory, since you can't have this in an XML block (it is used only in return values & dynamic inputs). I think this is right, but we may need to add some functionality to let this go into the factory.

Since:

1.0

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Nested Class Summary
private  class	BagAttribute.ImmutableIterator           This is a version of Iterator that overrides the remove method so that items can't be taken out of the bag.

 

Field Summary
private  java.util.Collection	bag

 

Fields inherited from class com.sun.xacml.attr.AttributeValue

 

Constructor Summary

BagAttribute(java.net.URI type, java.util.Collection bag)           Creates a new BagAttribute that represents the Collection of AttributeValues supplied.

 

Method Summary
boolean	contains(AttributeValue value)           Returns true if this set contains the specified value.
boolean	containsAll(BagAttribute bag)           Returns true if this bag contains all of the values of the specified bag.
static BagAttribute	createEmptyBag(java.net.URI type)           Convenience function that returns a bag with no elements
java.lang.String	encode()           Because a bag cannot be included in a request/response or a policy, this will always throw an UnsupportedOperationException.
boolean	isBag()           Overrides the default method to always return true.
boolean	isEmpty()           A convenience function that returns whether or not the bag is empty (ie, whether or not the size of the bag is zero)
java.util.Iterator	iterator()           Returns an iterator over te
int	size()           Returns the number of elements in this bag

 

Methods inherited from class com.sun.xacml.attr.AttributeValue

encode, encode, encodeWithTags, evaluate, evaluatesToBag, getChildren, getType

 

Methods inherited from class java.lang.Object

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

 

Field Detail

bag

private java.util.Collection bag

Constructor Detail

BagAttribute

public BagAttribute(java.net.URI type,
                    java.util.Collection bag)

Creates a new BagAttribute that represents the Collection of AttributeValues supplied. If the set is null or empty, then the new bag is empty.

Method Detail

isBag

public boolean isBag()

Overrides the default method to always return true.

Overrides:

isBag in class AttributeValue

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createEmptyBag

public static BagAttribute createEmptyBag(java.net.URI type)

Convenience function that returns a bag with no elements

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isEmpty

public boolean isEmpty()

A convenience function that returns whether or not the bag is empty (ie, whether or not the size of the bag is zero)

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size

public int size()

Returns the number of elements in this bag

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contains

public boolean contains(AttributeValue value)

Returns true if this set contains the specified value. More formally, returns true if and only if this bag contains a value v such that (value==null ? v==null : value.equals(v)). Note that this will only work correctly if the AttributeValue has overridden the equals method.

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containsAll

public boolean containsAll(BagAttribute bag)

Returns true if this bag contains all of the values of the specified bag. Note that this will only work correctly if the AttributeValue type contained in the bag has overridden the equals method.

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iterator

public java.util.Iterator iterator()

Returns an iterator over te

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encode

public java.lang.String encode()

Because a bag cannot be included in a request/response or a policy, this will always throw an UnsupportedOperationException.

Specified by:

encode in class AttributeValue

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