Package org.apache.commons.functor.core.composite

Class UnaryCompositeBinaryPredicate<L,R>

java.lang.Object

org.apache.commons.functor.core.composite.UnaryCompositeBinaryPredicate<L,R>

Type Parameters:

L - the left argument type.

R - the right argument type.

All Implemented Interfaces:

java.io.Serializable, BinaryFunctor<L,R>, BinaryPredicate<L,R>, Functor

public class UnaryCompositeBinaryPredicate<L,R>
extends java.lang.Object
implements BinaryPredicate<L,R>, java.io.Serializable

A BinaryPredicate composed of one binary predicate, p, and two unary functions, f and g, evaluating the ordered parameters x, y to p(f(x),g(y)).

Note that although this class implements Serializable, a given instance will only be truly Serializable if all the underlying functors are. Attempts to serialize an instance whose delegates are not all Serializable will result in an exception.

Version:

$Revision$ $Date$

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	UnaryCompositeBinaryPredicate.Helper<G,H,L,R>	Internal helper.

Field Summary

Fields

Modifier and Type	Field	Description
private static int	HASH_SHIFT	Base hash integer used to shift hash.
private UnaryCompositeBinaryPredicate.Helper<?,?,L,R>	helper	The adapted helper.
private static long	serialVersionUID	serialVersionUID declaration.

Constructor Summary

Constructors

Constructor	Description
UnaryCompositeBinaryPredicate(BinaryPredicate<? super G,? super H> f, UnaryFunction<? super L,? extends G> g, UnaryFunction<? super R,? extends H> h)	Create a new UnaryCompositeBinaryPredicate.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object that)	Indicates whether some other object is "equal to" this functor.
boolean	equals(UnaryCompositeBinaryPredicate<?,?> that)	Learn whether another UnaryCompositeBinaryPredicate is equal to this.
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.
java.lang.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

serialVersionUID

private static final long serialVersionUID

serialVersionUID declaration.

See Also:

Constant Field Values

HASH_SHIFT

private static final int HASH_SHIFT

Base hash integer used to shift hash.

See Also:

Constant Field Values

helper

private final UnaryCompositeBinaryPredicate.Helper<?,?,L,R> helper

The adapted helper.

Constructor Detail

UnaryCompositeBinaryPredicate

public UnaryCompositeBinaryPredicate(BinaryPredicate<? super G,? super H> f,
                                     UnaryFunction<? super L,? extends G> g,
                                     UnaryFunction<? super R,? extends H> h)

Create a new UnaryCompositeBinaryPredicate.

Type Parameters:

G - right function type.

H - right function type.

Parameters:

f - BinaryPredicate to test output(f), output(g)

g - left UnaryFunction

h - right UnaryFunction

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(java.lang.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 java.lang.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(UnaryCompositeBinaryPredicate<?,?> that)

Learn whether another UnaryCompositeBinaryPredicate is equal to this.

Parameters:

that - UnaryCompositeBinaryPredicate 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 java.lang.Object

Returns:

a hash code for this functor

See Also:

Functor.equals(java.lang.Object)

toString

public java.lang.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 java.lang.Object

Returns:

a human readable description of this functor