org.osgi.service.condpermadmin

Class BooleanCondition

java.lang.Object

org.osgi.service.condpermadmin.BooleanCondition

All Implemented Interfaces:

Condition

final class BooleanCondition
extends java.lang.Object
implements Condition

Package private class used to define the Condition.FALSE and Condition.TRUE constants.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	satisfied

Fields inherited from interface org.osgi.service.condpermadmin.Condition

FALSE, TRUE

Constructor Summary

Constructors

Constructor and Description
BooleanCondition(boolean satisfied)

Method Summary

Modifier and Type	Method and Description
boolean	isMutable() Returns whether the Condition is mutable.
boolean	isPostponed() Returns whether the evaluation must be postponed until the end of the permission check.
boolean	isSatisfied() Returns whether the Condition is satisfied.
boolean	isSatisfied(Condition[] conds, java.util.Dictionary<java.lang.Object,java.lang.Object> context) Returns whether the specified set of Condition objects are satisfied.

Methods inherited from class java.lang.Object

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

Field Detail

satisfied

private final boolean satisfied

Constructor Detail

BooleanCondition

BooleanCondition(boolean satisfied)

Method Detail

isPostponed

public boolean isPostponed()

Description copied from interface: Condition

Returns whether the evaluation must be postponed until the end of the permission check. If this method returns false (or this Condition is immutable), then this Condition must be able to directly answer the Condition.isSatisfied() method. In other words, isSatisfied() will return very quickly since no external sources, such as for example users or networks, need to be consulted.

This method must always return the same value whenever it is called so that the Conditional Permission Admin can cache its result.

Specified by:

isPostponed in interface Condition

Returns:

true to indicate the evaluation must be postponed. Otherwise, false if the evaluation can be performed immediately.

isSatisfied

public boolean isSatisfied()

Description copied from interface: Condition

Returns whether the Condition is satisfied. This method is only called for immediate Condition objects or immutable postponed conditions, and must always be called inside a permission check. Mutable postponed Condition objects will be called with the grouped version Condition.isSatisfied(Condition[],Dictionary) at the end of the permission check.

Specified by:

isSatisfied in interface Condition

Returns:

true to indicate the Conditions is satisfied. Otherwise, false if the Condition is not satisfied.

isMutable

public boolean isMutable()

Description copied from interface: Condition

Returns whether the Condition is mutable. A Condition can go from mutable (true) to immutable (false) over time but never from immutable (false) to mutable (true).

Specified by:

isMutable in interface Condition

Returns:

true Condition.isSatisfied() can change. Otherwise, false if the value returned by Condition.isSatisfied() will not change for this condition.

isSatisfied

public boolean isSatisfied(Condition[] conds,
                           java.util.Dictionary<java.lang.Object,java.lang.Object> context)

Description copied from interface: Condition

Returns whether the specified set of Condition objects are satisfied. Although this method is not static, it must be implemented as if it were static. All of the passed Condition objects will be of the same type and will correspond to the class type of the object on which this method is invoked. This method must be called inside a permission check only.

Specified by:

isSatisfied in interface Condition

Parameters:

conds - The array of Condition objects, which must all be of the same class and mutable. The receiver must be one of those Condition objects.

context - A Dictionary object that implementors can use to track state. If this method is invoked multiple times in the same permission check, the same Dictionary will be passed multiple times. The SecurityManager treats this Dictionary as an opaque object and simply creates an empty dictionary and passes it to subsequent invocations if multiple invocations are needed.

Returns:

true if all the Condition objects are satisfied. Otherwise, false if one of the Condition objects is not satisfied.