Package de.uplanet.lucy.server.auxiliaries

Klasse ObjectHelper

java.lang.Object

de.uplanet.lucy.server.auxiliaries.ObjectHelper

@VelocityVariable("ObjectHelper")
@VelocityCallable("singleton")
public final class ObjectHelper
extends Object

Konstruktorübersicht

Konstruktoren

Konstruktor	Beschreibung
ObjectHelper()

Methodenübersicht

Modifizierer und Typ	Methode	Beschreibung
Object	getNull()
IValueHolder<?>	getNullValueHolder()
boolean	isFalseOrNull(Object p_obj)	Checks if the given argument is a boolean false, or null.
boolean	isNull(Object p_obj)	Checks if the given argument is null.
boolean	isTrueOrNull(Object p_obj)	Checks if the given argument is a boolean true, or null.
boolean	isVHNull(IValueHolder<?> p_vh)
boolean	isVHNullOrEmpty(IValueHolder<?> p_vh)
Object	orElse(Object p_obj, Object p_fallback)	Checks if the given object reference is null, and returns either the object itself if it is not null, or the provided fallback value if the object reference is null.

Von Klasse geerbte Methoden java.lang.Object

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

Konstruktordetails

ObjectHelper

public ObjectHelper()

Methodendetails

isNull

public boolean isNull(Object p_obj)

Checks if the given argument is null.

Parameter:

p_obj - The value to be checked.

Gibt zurück:

true if the given value is null, or false otherwise.

orElse

public Object orElse(Object p_obj,
 Object p_fallback)

Checks if the given object reference is null, and returns either the object itself if it is not null, or the provided fallback value if the object reference is null.

Parameter:

p_obj - The object reference to check.

p_fallback - The fallback value.

Gibt zurück:

The value of the object reference if it is not null, the fallback value otherwise.

Siehe auch:

• TextUtil.fallbackIfNullOrEmpty(CharSequence, String)

isTrueOrNull

public boolean isTrueOrNull(Object p_obj)

Checks if the given argument is a boolean true, or null.

Parameter:

p_obj - A boolean value, or null.

Gibt zurück:

true if the given value is a boolean true or null, or false otherwise.

Löst aus:

IllegalArgumentException - If the given argument is neither a boolean value nor null.

isFalseOrNull

public boolean isFalseOrNull(Object p_obj)

Checks if the given argument is a boolean false, or null.

Parameter:

p_obj - A boolean value, or null.

Gibt zurück:

true if the given value is a boolean false or null, or false otherwise.

Löst aus:

IllegalArgumentException - If the given argument is neither a boolean value nor null.

getNull

public Object getNull()

getNullValueHolder

public IValueHolder<?> getNullValueHolder()

isVHNull

public boolean isVHNull(IValueHolder<?> p_vh)

isVHNullOrEmpty

public boolean isVHNullOrEmpty(IValueHolder<?> p_vh)