Package com.oracle.coherence.concurrent.executor.function

Class Predicates

java.lang.Object

com.oracle.coherence.concurrent.executor.function.Predicates

public final class Predicates
extends Object

Helper methods for Remote.Predicates.

Since:

21.12

Author:

bo

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Predicates.AlwaysPredicate	An Predicates.AlwaysPredicate returns true for any value provided to the Predicate.test(Object) method.
static class	Predicates.EqualToPredicate<T>	A Remote.Predicate to compare a value using Object.equals(Object).
static class	Predicates.IsValuePredicate<T>	An Predicates.IsValuePredicate returns true when a provided Result.isValue().
static class	Predicates.NegatePredicate<T>	A Remote.Predicate that negates the result of another Remote.Predicate.
static class	Predicates.NeverPredicate	An Predicates.NeverPredicate returns false for any value provided to the Predicate.test(Object) method.
static class	Predicates.NullValuePredicate	An Predicates.NullValuePredicate returns true for any value provided to the Predicate.test(Object) method that is null.
static class	Predicates.OptionPredicate	A Remote.Predicate to determine if an TaskExecutorService.ExecutorInfo has a specific TaskExecutorService.Registration.Option.
static class	Predicates.RolePredicate	A Remote.Predicate for matching the name of a Role.
static class	Predicates.ThrowablePredicate<T>	An Predicates.ThrowablePredicate returns true when a provided Result.isThrowable().

Method Summary

Modifier and Type	Method	Description
static <T> Remote.Predicate<T>	always()	Obtains a Remote.Predicate that always succeeds.
static <T> Remote.Predicate<T>	anything()	Obtains a Remote.Predicate that always succeeds.
static <T> Remote.Predicate<Result<T>>	available()	Obtains a Remote.Predicate that succeeds when Result.isPresent() ()}.
static <T> Remote.Predicate<T>	equalTo(T value)	Obtains a Remote.Predicate that uses Object.equals(Object) to compare against a specified value.
static Remote.Predicate<com.oracle.coherence.concurrent.executor.TaskExecutorService.ExecutorInfo>	has(com.oracle.coherence.concurrent.executor.TaskExecutorService.Registration.Option option)	Obtains a Remote.Predicate for TaskExecutorService.ExecutorInfo to determine if a specific TaskExecutorService.Registration.Option is defined.
static <T> Remote.Predicate<T>	is(Remote.Predicate<T> predicate)	Returns the specified Remote.Predicate.
static <T> Remote.Predicate<T>	is(T value)	Obtains a Remote.Predicate that uses Object.equals(Object) to compare against a specified value.
static <T> Remote.Predicate<T>	never()	Obtains a Remote.Predicate that never succeeds.
static <T> Remote.Predicate<T>	not(Remote.Predicate<T> predicate)	Obtains a Remote.Predicate that negates the result of another Remote.Predicate.
static <T> Remote.Predicate<T>	notNullValue()	Obtains a Remote.Predicate that succeeds when provided with a non-null value.
static <T> Remote.Predicate<T>	nullValue()	Obtains a Remote.Predicate that succeeds when provided with a null value.
static <T> Remote.Predicate<Result<T>>	onException()	Obtains a Remote.Predicate to ensure that the Throwable is handled.
static <T> Remote.Predicate<Result<T>>	onException(Throwable throwable)	Obtains a Remote.Predicate to ensure that the Result satisfies a specified Remote.Predicate.
static Remote.Predicate<com.oracle.coherence.concurrent.executor.TaskExecutorService.ExecutorInfo>	role(String pattern)	Obtains a Remote.Predicate for TaskExecutorService.ExecutorInfo to match the Role name.

Methods inherited from class java.lang.Object

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

Method Details

always

public static <T> Remote.Predicate<T> always()

Obtains a Remote.Predicate that always succeeds.

Type Parameters:

T - the type of value

Returns:

a Remote.Predicate

anything

public static <T> Remote.Predicate<T> anything()

Obtains a Remote.Predicate that always succeeds.

Type Parameters:

T - the type of value

Returns:

a Remote.Predicate

never

public static <T> Remote.Predicate<T> never()

Obtains a Remote.Predicate that never succeeds.

Type Parameters:

T - the type of value

Returns:

a Remote.Predicate

nullValue

public static <T> Remote.Predicate<T> nullValue()

Obtains a Remote.Predicate that succeeds when provided with a null value.

Type Parameters:

T - the type of value

Returns:

a Remote.Predicate

notNullValue

public static <T> Remote.Predicate<T> notNullValue()

Obtains a Remote.Predicate that succeeds when provided with a non-null value.

Type Parameters:

T - the type of value

Returns:

a Remote.Predicate

equalTo

public static <T> Remote.Predicate<T> equalTo(T value)

Obtains a Remote.Predicate that uses Object.equals(Object) to compare against a specified value.

Type Parameters:

T - the type of value

Parameters:

value - the value to compare

Returns:

a Remote.Predicate

is

public static <T> Remote.Predicate<T> is(T value)

Obtains a Remote.Predicate that uses Object.equals(Object) to compare against a specified value.

Type Parameters:

T - the type of value

Parameters:

value - the value to compare

Returns:

a Remote.Predicate

See Also:

• equalTo(Object)

is

public static <T> Remote.Predicate<T> is(Remote.Predicate<T> predicate)

Returns the specified Remote.Predicate.

This is syntactic sugar to allow more expressive predicate construction.

Type Parameters:

T - the type of value for the Remote.Predicate

Parameters:

predicate - the Remote.Predicate to return

Returns:

the specified Remote.Predicate

not

public static <T> Remote.Predicate<T> not(Remote.Predicate<T> predicate)

Obtains a Remote.Predicate that negates the result of another Remote.Predicate.

Type Parameters:

T - the type of the value

Parameters:

predicate - the Remote.Predicate to negate

Returns:

a Remote.Predicate

available

public static <T> Remote.Predicate<Result<T>> available()

Obtains a Remote.Predicate that succeeds when Result.isPresent() ()}.

Type Parameters:

T - the type of Task result

Returns:

a Remote.Predicate

role

public static Remote.Predicate<com.oracle.coherence.concurrent.executor.TaskExecutorService.ExecutorInfo> role(String pattern)

Obtains a Remote.Predicate for TaskExecutorService.ExecutorInfo to match the Role name.

Parameters:

pattern - the Role name pattern to match

Returns:

a Remote.Predicate for TaskExecutorService.ExecutorInfo

has

public static Remote.Predicate<com.oracle.coherence.concurrent.executor.TaskExecutorService.ExecutorInfo> has(com.oracle.coherence.concurrent.executor.TaskExecutorService.Registration.Option option)

Obtains a Remote.Predicate for TaskExecutorService.ExecutorInfo to determine if a specific TaskExecutorService.Registration.Option is defined.

Parameters:

option - the TaskExecutorService.Registration.Option

Returns:

a Remote.Predicate for TaskExecutorService.ExecutorInfo

onException

public static <T> Remote.Predicate<Result<T>> onException()

Obtains a Remote.Predicate to ensure that the Throwable is handled.

Type Parameters:

T - the type of the task

Returns:

a Remote.Predicate for Throwable

onException

public static <T> Remote.Predicate<Result<T>> onException(Throwable throwable)

Obtains a Remote.Predicate to ensure that the Result satisfies a specified Remote.Predicate.

Type Parameters:

T - the type of the task

Parameters:

throwable - a result with a throwable

Returns:

a Remote.Predicate for a given Throwable