org.erights.e.elib.util
Class Once

java.lang.Object
  |
  +--org.erights.e.elib.util.Once

All Implemented Interfaces:

Marker, OneArgFunc, PassByProxy, Persistent, Serializable

public class Once

extends Object

implements OneArgFunc, PassByProxy, Persistent

Untamed: An encapsulating forwarder around a OneArgFunc that only passes the first call through.

Since the wrapped OneArgFunc may be Persistent, we should be Persistent. Since we are encapsulating, we cannot be PassByConstruction, but should be PassByProxy.

Author:

Mark S. Miller

See Also:

Serialized Form

Field Summary

private OneArgFunc	myOptWrapped
(package private) static long	serialVersionUID

Fields inherited from interface org.erights.e.elib.serial.PassByProxy

HONORARY, HONORED_NAMES

Fields inherited from interface org.erights.e.elib.serial.Persistent

HONORARY, HONORED_NAMES

Constructor Summary

Once(OneArgFunc wrapped)
Enabled: Makes an object that will only forward one run/1 message to wrapped.

Method Summary

Object

run(Object arg) Enabled:

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

static final long serialVersionUID

myOptWrapped

private OneArgFunc myOptWrapped

Constructor Detail

Once

public Once(OneArgFunc wrapped)

Enabled: Makes an object that will only forward one run/1 message to wrapped.

Method Detail

run

public Object run(Object arg)

Enabled:

Specified by:

run in interface OneArgFunc