Class ObjectHelper
java.lang.Object
de.uplanet.lucy.server.auxiliaries.ObjectHelper
@VelocityVariable("ObjectHelper")
@VelocityCallable("singleton")
public final class ObjectHelper
extends Object
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptiongetNull()
de.uplanet.lucy.server.dataobjects.IValueHolder<?>
boolean
isFalseOrNull
(Object p_obj) Checks if the given argument is a booleanfalse
, ornull
.boolean
Checks if the given argument isnull
.boolean
isTrueOrNull
(Object p_obj) Checks if the given argument is a booleantrue
, ornull
.boolean
isVHNull
(de.uplanet.lucy.server.dataobjects.IValueHolder<?> p_vh) boolean
isVHNullOrEmpty
(de.uplanet.lucy.server.dataobjects.IValueHolder<?> p_vh) Checks if the given object reference isnull
, and returns either the object itself if it is notnull
, or the provided fallback value if the object reference isnull
.
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Constructor Details
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ObjectHelper
public ObjectHelper()
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Method Details
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isNull
Checks if the given argument isnull
.- Parameters:
p_obj
- The value to be checked.- Returns:
true
if the given value isnull
, orfalse
otherwise.
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orElse
Checks if the given object reference isnull
, and returns either the object itself if it is notnull
, or the provided fallback value if the object reference isnull
.- Parameters:
p_obj
- The object reference to check.p_fallback
- The fallback value.- Returns:
- The value of the object reference if it is not
null
, the fallback value otherwise. - See Also:
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isTrueOrNull
Checks if the given argument is a booleantrue
, ornull
.- Parameters:
p_obj
- A boolean value, ornull
.- Returns:
true
if the given value is a booleantrue
ornull
, orfalse
otherwise.- Throws:
IllegalArgumentException
- If the given argument is neither a boolean value nornull
.
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isFalseOrNull
Checks if the given argument is a booleanfalse
, ornull
.- Parameters:
p_obj
- A boolean value, ornull
.- Returns:
true
if the given value is a booleanfalse
ornull
, orfalse
otherwise.- Throws:
IllegalArgumentException
- If the given argument is neither a boolean value nornull
.
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getNull
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getNullValueHolder
public de.uplanet.lucy.server.dataobjects.IValueHolder<?> getNullValueHolder() -
isVHNull
public boolean isVHNull(de.uplanet.lucy.server.dataobjects.IValueHolder<?> p_vh) -
isVHNullOrEmpty
public boolean isVHNullOrEmpty(de.uplanet.lucy.server.dataobjects.IValueHolder<?> p_vh)
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