Module coneforest.psylla

Package coneforest.psylla.core

Class PsyNull

java.lang.Object

coneforest.psylla.core.PsyNull

All Implemented Interfaces:

PsyObject, PsyValue

@Type("null")
public final class PsyNull
extends Object
implements PsyValue

The representation of null, a type of a void placeholder. There is the only instance of this class, NULL.

Field Summary

Fields

Modifier and Type	Field	Description
static final PsyNull	NULL	The sole null object.

Fields inherited from interface coneforest.psylla.core.PsyObject

PSY_CLONE, PSY_EQ, PSY_HASHCODE, PSY_INSTANCEOF, PSY_NE, PSY_TOSTRING, PSY_TOSTRINGBUFFER, PSY_TYPE

Method Summary

Modifier and Type	Method	Description
PsyBoolean	psyEq(PsyObject o)	Returns a boolean indicating whether some other object is “equal to” this one.
String	toSyntaxString()	Returns a string "%null%".

Methods inherited from class java.lang.Object

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

Methods inherited from interface coneforest.psylla.core.PsyObject

convert, execute, invoke, psyHashCode, psyInstanceOf, psyNe, psySyntax, psyToString, psyToStringBuffer, psyType, typeName

Methods inherited from interface coneforest.psylla.core.PsyValue

psyClone

Field Details

NULL

public static final PsyNull NULL

The sole null object.

Method Details

toSyntaxString

public String toSyntaxString()

Returns a string "%null%".

Specified by:

toSyntaxString in interface PsyObject

Returns:

a string "%null%"

psyEq

public PsyBoolean psyEq(PsyObject o)

Returns a boolean indicating whether some other object is “equal to” this one. Return value is true if and only if other object has name type.

Specified by:

psyEq in interface PsyObject

Parameters:

o - the object to be compared for equality.

Returns:

a boolean indicating whether some other object is “equal to” this one