org.cactoos.scalar

Class RetryScalar<T>

java.lang.Object

org.cactoos.scalar.RetryScalar<T>

Type Parameters:

T - Type of output

All Implemented Interfaces:

Scalar<T>

public final class RetryScalar<T>
extends Object
implements Scalar<T>

Func that will try a few times before throwing an exception.

There is no thread-safety guarantee.

Since:

0.9

Version:

$Id: 9e78a02aa1e11d5d916262fe777136b27c1ba54c $

Author:

Yegor Bugayenko ([email protected])

Nested Class Summary

Nested classes/interfaces inherited from interface org.cactoos.Scalar

Scalar.NoNulls<T>

Constructor Summary

Constructors

Constructor and Description
RetryScalar(Scalar<T> scalar) Ctor.
RetryScalar(Scalar<T> scalar, Func<Integer,Boolean> exit) Ctor.
RetryScalar(Scalar<T> scalar, int attempts) Ctor.

Method Summary

Modifier and Type	Method and Description
T	value() Convert it to the value.

Methods inherited from class java.lang.Object

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

Constructor Detail

RetryScalar

public RetryScalar(Scalar<T> scalar)

Ctor.

Parameters:

scalar - Scalar original

RetryScalar

public RetryScalar(Scalar<T> scalar,
                   int attempts)

Ctor.

Parameters:

scalar - Scalar original

attempts - Maximum number of attempts

RetryScalar

public RetryScalar(Scalar<T> scalar,
                   Func<Integer,Boolean> exit)

Ctor.

Parameters:

scalar - Func original

exit - Exit condition, returns TRUE if there is no reason to try

Method Detail

value

public T value()
        throws Exception

Description copied from interface: Scalar

Convert it to the value.

Specified by:

value in interface Scalar<T>

Returns:

The value

Throws:

Exception - If fails