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java.lang.Object org.apache.commons.functor.core.IsNotNull<T>
T
- the argument type.public final class IsNotNull<T>
Tests
false
iff its argument
is null
.
Field Summary | |
---|---|
static IsNotNull<Object> |
INSTANCE
Basic IsNotNull instance. |
static BinaryPredicate<Object,Object> |
LEFT
Left-handed BinaryPredicate. |
static BinaryPredicate<Object,Object> |
RIGHT
Right-handed BinaryPredicate. |
Constructor Summary | |
---|---|
IsNotNull()
Create a new IsNotNull. |
Method Summary | ||
---|---|---|
boolean |
equals(Object that)
Indicates whether some other object is "equal to" this functor. |
|
int |
hashCode()
Returns a hash code for this functor adhering to the general Object.hashCode contract. |
|
static
|
instance()
Get an IsNotNull instance. |
|
static
|
left()
Get a BinaryPredicate that matches if the left argument is not null. |
|
static
|
right()
Get a BinaryPredicate that matches if the right argument is null. |
|
boolean |
test(Object obj)
Evaluate this predicate. |
|
String |
toString()
Returns a human readable description of this functor. |
Methods inherited from class java.lang.Object |
---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Field Detail |
---|
public static final IsNotNull<Object> INSTANCE
public static final BinaryPredicate<Object,Object> LEFT
public static final BinaryPredicate<Object,Object> RIGHT
Constructor Detail |
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public IsNotNull()
Method Detail |
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public boolean test(Object obj)
test
in interface UnaryPredicate<T>
obj
- the A object to test
public boolean equals(Object that)
Object.equals
contract.
Additionally, this method can return
true only if the specified Object implements
the same functor interface and is known to produce the same
results and/or side-effects for the same arguments (if any).
While implementators are strongly encouraged to override
the default Object implementation of this method,
note that the default Object implementation
does in fact adhere to the functor equals
contract.
equals
in interface Functor
equals
in class Object
that
- the object to compare this functor to
true
iff the given object implements
this functor interface, and is known to produce the same
results and/or side-effects for the same arguments
(if any).Functor.hashCode()
public int hashCode()
Object.hashCode
contract.
Implementators are strongly encouraged but not
strictly required to override the default Object
implementation of this method.
hashCode
in interface Functor
hashCode
in class Object
Functor.equals(java.lang.Object)
public String toString()
Object
implementation of this method.
toString
in interface Functor
toString
in class Object
public static <T> IsNotNull<T> instance()
T
- the predicate argument type.
public static <A> BinaryPredicate<A,Object> left()
A
- the left BinaryPredicate
argument type.
public static <A> BinaryPredicate<Object,A> right()
A
- the right BinaryPredicate
argument type.
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