org.erights.e.elib.slot
Class VoidGuard

java.lang.Object
  |
  +--org.erights.e.elib.slot.BaseGuard
        |
        +--org.erights.e.elib.slot.VoidGuard

All Implemented Interfaces:

Guard, SlotGuard, ValueGuard

public class VoidGuard

extends BaseGuard

Safe: Bound to "void" in the initial environment, it coerces all values to null.

When a method or function does not explicitly specify a return type, the default return type is "void".

Author:

Mark S. Miller

Field Summary

static VoidGuard

THE_ONE Enabled:

Fields inherited from class org.erights.e.elib.slot.BaseGuard

myOptValueGuard

Constructor Summary

private

VoidGuard() prevent external instantiation

Method Summary

Object	coerce(Object specimen, OneArgFunc optEjector) Enabled: Coerce everything to null.
String	getName() Enabled:

Methods inherited from class org.erights.e.elib.slot.BaseGuard

__printOn, accepts, and, butNot, coerce, get, makeSlot, makeSlot, not, or, toString, xor

Methods inherited from class java.lang.Object

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

Field Detail

THE_ONE

public static final VoidGuard THE_ONE

Enabled:

Constructor Detail

VoidGuard

private VoidGuard()

prevent external instantiation

Method Detail

coerce

public Object coerce(Object specimen,
                     OneArgFunc optEjector)

Enabled: Coerce everything to null.

Specified by:

coerce in interface ValueGuard

Overrides:

coerce in class BaseGuard

getName

public String getName()

Enabled:

Specified by:

getName in interface SlotGuard

Overrides:

getName in class BaseGuard