net.sf.staccatocommons.lang.predicate
Class Predicates

java.lang.Object
  net.sf.staccatocommons.lang.predicate.Predicates

public class Predicates
extends Object

Factory methods for common predicates

Author:

flbulgarelli

Method Summary

static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	all(net.sf.staccatocommons.defs.Evaluable<T>... predicates) Returns a predicate that evaluates to true if and only if all the given predicates evaluate true
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	all(Iterable<net.sf.staccatocommons.defs.Evaluable<T>> predicates) Returns a predicate that evaluates to true if and only if all the given predicates evaluate true
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	any(net.sf.staccatocommons.defs.Evaluable<T>... predicates) Returns a predicate that evaluates to false if and only if all the given predicates evaluate false
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	any(Iterable<net.sf.staccatocommons.defs.Evaluable<T>> predicates) Returns a predicate that evaluates to false if and only if all the given predicates evaluate false
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	equal(T value) Returns a predicate that tests if the given value is equal to its argument: value.equals(argument).
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	false_()
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	from(net.sf.staccatocommons.defs.Evaluable<? super T> evaluable) Converts the given Evaluable into a AbstractPredicate.
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	in(Collection<T> values) Returns a predicate that tests if its argument is equal to any of the values in the given collection
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	in(T... values) Returns a predicate that tests if its argument is equal to any of the given values
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	isInstanceOf(Class<? extends T> clazz) Returns a predicate that tests if its argument is instance of the given class
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	notNull() Returns a preficate that tests if its argument is not null
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	null_() Returns a predicate that tests if its argument is null
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	same(T value) Returns a predicate that tests if its argument is the same that the given value
static <T> net.sf.staccatocommons.defs.predicate.Predicate<T>	true_()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

true_

@Constant
@NullSafe
public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> true_()

Type Parameters:

T -

Returns:

A AbstractPredicate that always returns true

false_

@Constant
@NullSafe
public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> false_()

Type Parameters:

T -

Returns:

A AbstractPredicate that always returns false

notNull

@Constant
@NullSafe
public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> notNull()

Returns a preficate that tests if its argument is not null

Type Parameters:

T -

Returns:

A constant AbstractPredicate

null_

@Constant
@NullSafe
public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> null_()

Returns a predicate that tests if its argument is null

Type Parameters:

T -

Returns:

A singleton AbstractPredicate

equal

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> equal(@NonNull
                                                                           T value)

Returns a predicate that tests if the given value is equal to its argument: value.equals(argument).

Type Parameters:

T -

Parameters:

value -

Returns:

Equiv.equal().apply(value)

same

@NullSafe
public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> same(T value)

Returns a predicate that tests if its argument is the same that the given value

Type Parameters:

T -

Parameters:

value -

Returns:

Equiv.same().apply(value)

isInstanceOf

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> isInstanceOf(@NonNull
                                                                                  Class<? extends T> clazz)

Returns a predicate that tests if its argument is instance of the given class

Type Parameters:

T -

Parameters:

clazz -

Returns:

a new AbstractPredicate

in

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> in(@NonNull
                                                                        T... values)

Returns a predicate that tests if its argument is equal to any of the given values

Type Parameters:

T -

Parameters:

values -

Returns:

a new Predicate

in

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> in(@NonNull
                                                                        Collection<T> values)

Returns a predicate that tests if its argument is equal to any of the values in the given collection

Type Parameters:

T -

Parameters:

values -

Returns:

a new AbstractPredicate

all

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> all(@NonNull
                                                                         net.sf.staccatocommons.defs.Evaluable<T>... predicates)

Returns a predicate that evaluates to true if and only if all the given predicates evaluate true

Type Parameters:

T -

Parameters:

predicates -

Returns:

the all predicate

all

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> all(@NonNull
                                                                         Iterable<net.sf.staccatocommons.defs.Evaluable<T>> predicates)

Returns a predicate that evaluates to true if and only if all the given predicates evaluate true

Type Parameters:

T -

Parameters:

predicates -

Returns:

the all predicate

any

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> any(@NonNull
                                                                         net.sf.staccatocommons.defs.Evaluable<T>... predicates)

Returns a predicate that evaluates to false if and only if all the given predicates evaluate false

Type Parameters:

T -

Parameters:

predicates -

Returns:

the any predicate

any

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> any(@NonNull
                                                                         Iterable<net.sf.staccatocommons.defs.Evaluable<T>> predicates)

Returns a predicate that evaluates to false if and only if all the given predicates evaluate false

Type Parameters:

T -

Parameters:

predicates -

Returns:

the any predicate

from

public static <T> net.sf.staccatocommons.defs.predicate.Predicate<T> from(@NonNull
                                                                          net.sf.staccatocommons.defs.Evaluable<? super T> evaluable)

Converts the given Evaluable into a AbstractPredicate. If it is already a Predicate, returns it.

Type Parameters:

T -

Parameters:

evaluable -

Returns:

a AbstractPredicate view of the given evaluable, or the evaluable, it is a AbstractPredicate already