Package utility.function
Class Dummy
java.lang.Object
utility.function.Dummy
A utility class to help create dummy stub functional interfaces
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic Callback
callback()
Creates a dummy callbackstatic <T> Consumer<T>
consumer()
Creates a dummy consumerstatic <T,
R> Function<T, R> function()
Creates a dummy functionstatic Runnable
Returns the given runnable object if it is notnull
.static <T> Consumer<T>
Returns the given consumer object if it is notnull
.static <T,
R> Function<T, R> Returns the given function object if it is notnull
.static <T> Supplier<T>
Returns the given callback object if it is notnull
.static Callback
Returns the given callback object if it is notnull
.static Runnable
runnable()
Creates a dummy runnablestatic <T> Supplier<T>
supplier()
Creates a dummy supplier
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Constructor Details
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Dummy
public Dummy()
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Method Details
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callback
Creates a dummy callback- Returns:
- a dummy callback
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consumer
Creates a dummy consumer- Returns:
- a dummy consumer
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function
Creates a dummy function- Type Parameters:
T
- the input typeR
- the result type- Returns:
- the function
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supplier
Creates a dummy supplier- Type Parameters:
T
- the result type- Returns:
- the supplier
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runnable
Creates a dummy runnable- Returns:
- the runnable
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ifNull
Returns the given consumer object if it is notnull
. Otherwise, aconsumer()
is returned. This is useful to avoid usingnull
.- Parameters:
c
- the consumer function to check fornull
- Returns:
- a non-null consumer
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ifNull
Returns the given callback object if it is notnull
. Otherwise, acallback()
is returned. This is useful to avoid usingnull
.- Parameters:
c
- the callback function to check fornull
- Returns:
- a non-null callback function
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ifNull
Returns the given function object if it is notnull
. Otherwise, afunction()
is returned. This is useful to avoid usingnull
.- Type Parameters:
T
- the input typeR
- the result type- Parameters:
f
- the function to check fornull
- Returns:
- a non-null function
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ifNull
Returns the given callback object if it is notnull
. Otherwise, acallback()
is returned. This is useful to avoid usingnull
.- Parameters:
s
- the supplier function to check fornull
- Returns:
- a non-null supplier
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ifNull
Returns the given runnable object if it is notnull
. Otherwise, arunnable()
is returned. This is useful to avoid usingnull
.- Parameters:
r
- the runnable function to check fornull
- Returns:
- a non-null runnable
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