org.erights.e.elib.prim
Class CallableScript

java.lang.Object
  |
  +--org.erights.e.elib.prim.CallableScript

All Implemented Interfaces:

Script

final class CallableScript

extends Object

implements Script

Author:

Mark S. Miller

Field Summary

(package private) static Script

THE_ONE The behavior of all Callables are described by the one CallableScript

Constructor Summary

private

CallableScript()

Method Summary

Object	execute(Object self, String verb, Object[] args) Enabled: verb must be an interned string
void	protocol(Object optSelf, FlexList mTypes) Enabled: Adds to 'mTypes' the mappings provided by this script.
boolean	respondsTo(Object optSelf, String verb, int arity) Enabled: Does an object whose behavior is this script respond to verb/arity messages?
Script	shorten(Object optSelf, String aVerb, Object[] args) Delegate's the shortening to optSelf's Callable.optShorten(java.lang.String, java.lang.Object[])

Methods inherited from class java.lang.Object

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

Field Detail

THE_ONE

static final Script THE_ONE

The behavior of all Callables are described by the one CallableScript

Constructor Detail

CallableScript

private CallableScript()

Method Detail

shorten

public Script shorten(Object optSelf,
                      String aVerb,
                      Object[] args)

Delegate's the shortening to optSelf's Callable.optShorten(java.lang.String, java.lang.Object[])

Specified by:

shorten in interface Script

Parameters:

optSelf - If present, then a script could shorten using instance-specific data.

aVerb - Must be interned

args - Typically, only its arity is used. But OverloaderNode uses the types of the arguments to select among Java overloads.

Returns:

The Script to use in lieu of this one. Note that it's always correct a Script to just return itself.

execute

public Object execute(Object self,
                      String verb,
                      Object[] args)

Description copied from interface: Script

Enabled: verb must be an interned string

Specified by:

execute in interface Script

Parameters:

self -

verb -

args -

Returns:

protocol

public void protocol(Object optSelf,
                     FlexList mTypes)

Description copied from interface: Script

Enabled: Adds to 'mTypes' the mappings provided by this script.

Specified by:

protocol in interface Script

Parameters:

optSelf -

mTypes -

respondsTo

public boolean respondsTo(Object optSelf,
                          String verb,
                          int arity)

Description copied from interface: Script

Enabled: Does an object whose behavior is this script respond to verb/arity messages?

Specified by:

respondsTo in interface Script

Parameters:

optSelf -

verb -

arity -

Returns: