org.codehaus.groovy.runtime
Class NullObject

java.lang.Object
  groovy.lang.GroovyObjectSupport
      org.codehaus.groovy.runtime.NullObject

All Implemented Interfaces:

GroovyObject

public class NullObject
extends GroovyObjectSupport

Method Summary

Object	clone() Since this is implemented as a singleton, we should avoid the use of the clone method
boolean	equals(Object to)
static NullObject	getNullObject() get the NullObject reference
Object	getProperty(String property)
Object	invokeMethod(String name, Object args) Invokes the given method
Iterator	iterator() iterator() method to be able to iterate on null.
Object	plus(String s)
Object	setProperty(String property)

Methods inherited from class groovy.lang.GroovyObjectSupport

getMetaClass, setMetaClass, setProperty

Methods inherited from class java.lang.Object

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

Method Detail

getNullObject

public static NullObject getNullObject()

get the NullObject reference

clone

public Object clone()
             throws CloneNotSupportedException

Since this is implemented as a singleton, we should avoid the use of the clone method

Overrides:

clone in class Object

Throws:

CloneNotSupportedException

getProperty

public Object getProperty(String property)

Specified by:

getProperty in interface GroovyObject

Overrides:

getProperty in class GroovyObjectSupport

Parameters:

property - - the property to get

Returns:

the given property

setProperty

public Object setProperty(String property)

Parameters:

property - - the property to set

invokeMethod

public Object invokeMethod(String name,
                           Object args)

Description copied from interface: GroovyObject

Invokes the given method

Specified by:

invokeMethod in interface GroovyObject

Overrides:

invokeMethod in class GroovyObjectSupport

Parameters:

name - the name of the method to invoke

args - - arguments to the method

equals

public boolean equals(Object to)

Overrides:

equals in class Object

Parameters:

to - - the reference object with which to compare

iterator

public Iterator iterator()

iterator() method to be able to iterate on null. Note: this part is from Invoker

Returns:

an iterator for an empty list

plus

public Object plus(String s)