wyvern.kernel.properties
Class NullValue

java.lang.Object
  wyvern.kernel.properties.NullValue

All Implemented Interfaces:

Singleton

public final class NullValue

extends java.lang.Object

implements Singleton

This object represents a "not-set" value in a plist. It's used when an object would normally inherit a property from its parent list, but you want it not to be set at all on the object. It's written out to the XML file with the value "null", so it could look like any of these:

Note: for beans, strings, and arch properties, a null value means "not there". For booleans, it's the same as being explicitly set to "false", and for numeric types, it's the same as having a value of zero.

Version:

1.0, Mar 19, 2003

Author:

Steve Yegge

Field Summary

static NullValue

NULL

Method Summary

static NullValue	getInstance()
java.lang.String	toString() Returns the string "null", which is used to write this value out to the XML file.

Methods inherited from class java.lang.Object

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

Field Detail

NULL

public static final NullValue NULL

Method Detail

getInstance

public static final NullValue getInstance()

toString

public java.lang.String toString()

Returns the string "null", which is used to write this value out to the XML file. Don't change it.