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java.lang.Object org.apache.commons.functor.core.composite.TransposedFunction<L,R,T>
public class TransposedFunction<L,R,T>
Transposes (swaps) the arguments to some other
function
.
For example, given a function f
and the ordered pair of arguments a,
b.
evaluates
to
f.evaluate(b,a)
.
Note that although this class implements
Serializable
, a given instance will
only be truly Serializable
if the
underlying functor is. Attempts to serialize
an instance whose delegate is not
Serializable
will result in an exception.
Constructor Summary | |
---|---|
TransposedFunction(BinaryFunction<? super R,? super L,? extends T> function)
Create a new TransposedFunction. |
Method Summary | ||
---|---|---|
boolean |
equals(Object that)
Indicates whether some other object is "equal to" this functor. |
|
boolean |
equals(TransposedFunction<?,?,?> that)
Learn whether another TransposedFunction is equal to this. |
|
T |
evaluate(L left,
R right)
Evaluate this function. |
|
int |
hashCode()
Returns a hash code for this functor adhering to the general Object.hashCode contract. |
|
String |
toString()
Returns a human readable description of this functor. |
|
static
|
transpose(BinaryFunction<? super L,? super R,? extends T> f)
Transpose a BinaryFunction. |
Methods inherited from class java.lang.Object |
---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
---|
public TransposedFunction(BinaryFunction<? super R,? super L,? extends T> function)
function
- BinaryFunction to transpose.Method Detail |
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public final T evaluate(L left, R right)
evaluate
in interface BinaryFunction<L,R,T>
left
- the L element of the ordered pair of argumentsright
- the R element of the ordered pair of arguments
public final 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 final boolean equals(TransposedFunction<?,?,?> that)
that
- TransposedFunction to test
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,T> TransposedFunction<R,L,T> transpose(BinaryFunction<? super L,? super R,? extends T> f)
f
- BinaryFunction to transpose
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