Package org.jruby.internal.runtime.methods

Class UndefinedMethod

java.lang.Object

org.jruby.internal.runtime.methods.DynamicMethod

org.jruby.internal.runtime.methods.UndefinedMethod

public final class UndefinedMethod
extends DynamicMethod

This class represents a singleton type of method used as a marker for missing or "undef'ed" methods. Only one instance is ever created, and it can't be invoked.

Nested Class Summary

Nested classes/interfaces inherited from class org.jruby.internal.runtime.methods.DynamicMethod

DynamicMethod.NativeCall, DynamicMethod.Version

Field Summary

Fields

Modifier and Type	Field	Description
static final UndefinedMethod	INSTANCE

Fields inherited from class org.jruby.internal.runtime.methods.DynamicMethod

definedClass, flags, handle, implementationClass, name, protectedClass, serialNumber

Constructor Summary

Constructors

Modifier	Constructor	Description
private	UndefinedMethod()	Constructor for the one UndefinedMethod instance.

Method Summary

Modifier and Type	Method	Description
IRubyObject	call(ThreadContext context, IRubyObject self, RubyModule klazz, String name, IRubyObject[] args, Block block)	The one implementation of call, which throws an exception because UndefinedMethod can't be invoked.
DynamicMethod	dup()	A dummy implementation of dup that just returns the singleton instance.
static UndefinedMethod	getInstance()	Retrieve the singleton instance.
Visibility	getVisibility()	UndefinedMethod is always visibility UNDEFINED
boolean	isCallableFrom(IRubyObject caller, CallType callType)	UndefinedMethod is always visible because it's only used as a marker for missing or undef'ed methods.
void	setDefinedClass(RubyModule definedClass)	Set the defining class for this method, as when restructuring hierarchy for prepend.
void	setImplementationClass(RubyModule implClass)	Dummy override of setImplementationClass that does nothing.
void	setIsBuiltin(boolean isBuiltin)
void	setNotImplemented(boolean setNotImplemented)	Set whether this method is "not implemented".
void	setVisibility(Visibility visibility)	Dummy implementation of setVisibility that does nothing.

Methods inherited from class org.jruby.internal.runtime.methods.DynamicMethod

calculateProtectedClass, call, call, call, call, call, call, call, call, call, callRespondTo, getArity, getCallConfig, getDefinedClass, getHandle, getImplementationClass, getInstanceVariableNames, getMethodData, getName, getProtectedClass, getRealMethod, getSerialNumber, getSignature, init, init, isBuiltin, isImplementedBy, isNative, isNotImplemented, isNull, isRefined, isUndefined, setCallConfig, setHandle

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final UndefinedMethod INSTANCE

Constructor Details

UndefinedMethod

private UndefinedMethod()

Constructor for the one UndefinedMethod instance.

Method Details

call

public IRubyObject call(ThreadContext context,
 IRubyObject self,
 RubyModule klazz,
 String name,
 IRubyObject[] args,
 Block block)

The one implementation of call, which throws an exception because UndefinedMethod can't be invoked.

Specified by:

call in class DynamicMethod

Parameters:

context - The thread context for the currently executing thread

self - The 'self' or 'receiver' object to use for this call

klazz - The Ruby class against which this method is binding

name - The incoming name used to invoke this method

args - The argument list to this invocation

block - The block passed to this invocation

Returns:

The result of the call

Throws:

UnsupportedOperationException

See Also:

• DynamicMethod.call(ThreadContext, IRubyObject, RubyModule, String)

dup

public DynamicMethod dup()

A dummy implementation of dup that just returns the singleton instance.

Specified by:

dup in class DynamicMethod

Returns:

The singleton instance

getInstance

public static UndefinedMethod getInstance()

Retrieve the singleton instance.

Returns:

The singleton instance

setImplementationClass

public void setImplementationClass(RubyModule implClass)

Dummy override of setImplementationClass that does nothing.

Overrides:

setImplementationClass in class DynamicMethod

Parameters:

implClass - Ignored

setDefinedClass

public void setDefinedClass(RubyModule definedClass)

Description copied from class: DynamicMethod

Set the defining class for this method, as when restructuring hierarchy for prepend.

Overrides:

setDefinedClass in class DynamicMethod

getVisibility

public Visibility getVisibility()

UndefinedMethod is always visibility UNDEFINED

Overrides:

getVisibility in class DynamicMethod

Returns:

The visibility of this method

setVisibility

public void setVisibility(Visibility visibility)

Dummy implementation of setVisibility that does nothing.

Overrides:

setVisibility in class DynamicMethod

Parameters:

visibility - Ignored

setIsBuiltin

public void setIsBuiltin(boolean isBuiltin)

Overrides:

setIsBuiltin in class DynamicMethod

setNotImplemented

public void setNotImplemented(boolean setNotImplemented)

Description copied from class: DynamicMethod

Set whether this method is "not implemented".

Overrides:

setNotImplemented in class DynamicMethod

isCallableFrom

public boolean isCallableFrom(IRubyObject caller,
 CallType callType)

UndefinedMethod is always visible because it's only used as a marker for missing or undef'ed methods.

Overrides:

isCallableFrom in class DynamicMethod

Parameters:

caller - The calling object

callType - The type of call

Returns:

true always