org.apache.commons.functor.adapter
Class IgnoreLeftPredicate<L,R>

java.lang.Object
  extended by org.apache.commons.functor.adapter.IgnoreLeftPredicate<L,R>
Type Parameters:
L - the left argument type.
R - the right argument type.
All Implemented Interfaces:
Serializable, BinaryFunctor<L,R>, BinaryPredicate<L,R>, Functor

public final class IgnoreLeftPredicate<L,R>
extends Object
implements BinaryPredicate<L,R>, Serializable

Adapts a UnaryPredicate to the BinaryPredicate interface by ignoring the first binary argument.

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.

Version:
$Revision: 1157611 $ $Date: 2011-08-14 21:45:14 +0200 (Sun, 14 Aug 2011) $
Author:
Rodney Waldhoff
See Also:
Serialized Form

Constructor Summary
IgnoreLeftPredicate(UnaryPredicate<? super R> predicate)
          Create a new IgnoreLeftPredicate.
 
Method Summary
static
<L,R> IgnoreLeftPredicate<L,R>
adapt(UnaryPredicate<? super R> predicate)
          Adapt a UnaryPredicate to an IgnoreLeftPredicate.
 boolean equals(IgnoreLeftPredicate<?,?> that)
          Learn whether another IgnoreLeftPredicate is equal to this.
 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.
 boolean test(L left, R right)
          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
 

Constructor Detail

IgnoreLeftPredicate

public IgnoreLeftPredicate(UnaryPredicate<? super R> predicate)
Create a new IgnoreLeftPredicate.

Parameters:
predicate - the right predicate
Method Detail

test

public boolean test(L left,
                    R right)
Evaluate this predicate.

Specified by:
test in interface BinaryPredicate<L,R>
Parameters:
left - the L element of the ordered pair of arguments
right - the R element of the ordered pair of arguments
Returns:
the result of this test for the given arguments

equals

public boolean equals(Object that)
Indicates whether some other object is "equal to" this functor. This method must adhere to general 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.

Specified by:
equals in interface Functor
Overrides:
equals in class Object
Parameters:
that - the object to compare this functor to
Returns:
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).
See Also:
Functor.hashCode()

equals

public boolean equals(IgnoreLeftPredicate<?,?> that)
Learn whether another IgnoreLeftPredicate is equal to this.

Parameters:
that - the IgnoreLeftPredicate to test
Returns:
boolean

hashCode

public int hashCode()
Returns a hash code for this functor adhering to the general Object.hashCode contract. Implementators are strongly encouraged but not strictly required to override the default Object implementation of this method.

Specified by:
hashCode in interface Functor
Overrides:
hashCode in class Object
Returns:
a hash code for this functor
See Also:
Functor.equals(java.lang.Object)

toString

public String toString()
Returns a human readable description of this functor. Implementators are strongly encouraged but not strictly required to override the default Object implementation of this method.

Specified by:
toString in interface Functor
Overrides:
toString in class Object
Returns:
a human readable description of this functor

adapt

public static <L,R> IgnoreLeftPredicate<L,R> adapt(UnaryPredicate<? super R> predicate)
Adapt a UnaryPredicate to an IgnoreLeftPredicate.

Type Parameters:
L - left type
R - right type
Parameters:
predicate - to adapt
Returns:
IgnoreLeftPredicate


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