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java.lang.Object org.apache.commons.functor.core.IsEqual<L,R>
L
- the left argument type.R
- the right argument type.public final class IsEqual<L,R>
Tests
true
iff its arguments are
equal
or both
null
.
This relation is
an equivalence relation on
the set of objects that adhere to the
Object.equals
contract.
Field Summary | |
---|---|
static IsEqual<Object,Object> |
INSTANCE
Basic IsEqual |
Constructor Summary | |
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IsEqual()
Create a new IsEqual. |
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 IsEqual instance. |
|
boolean |
test(L left,
R right)
Evaluate this predicate. |
|
static
|
to(R object)
Get an IsEqual UnaryPredicate. |
|
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 |
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public static final IsEqual<Object,Object> INSTANCE
Constructor Detail |
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public IsEqual()
Method Detail |
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public boolean test(L left, R right)
test
in interface BinaryPredicate<L,R>
left
- the L element of the ordered pair of argumentsright
- the R element of the ordered pair of arguments
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 <L,R> IsEqual<L,R> instance()
L
- the left argument type.R
- the right argument type.
public static <L,R> UnaryPredicate<L> to(R object)
L
- the left argument type.R
- the right argument type.object
- bound comparison object
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