org.cactoos

Interface Scalar<T>

Type Parameters:

T - Type of result

All Known Implementing Classes:

And, AndInThreads, AndWithIndex, AvgOf, BoolOf, CheckedScalar, Constant, DateOf, Equality, Equals, False, FirstOf, Folded, HighestOf, InheritanceLevel, IoCheckedScalar, IsBlank, ItemAt, LengthOf, LengthOf, LengthOf, LocalDateTimeOf, LowestOf, MaxOf, MinOf, Not, NumberEnvelope, NumberOf, OffsetDateTimeOf, Or, PropertiesOf, Reduced, RetryScalar, Scalar.NoNulls, ScalarWithFallback, SolidScalar, StickyScalar, SumOf, SumOfDoubleScalar, SumOfFloatScalar, SumOfIntScalar, SumOfLongScalar, SyncScalar, TempFile, Ternary, True, UncheckedScalar, ZonedDateTimeOf

public interface Scalar<T>

Scalar.

If you don't want to have any checked exceptions being thrown out of your Scalar, you can use UncheckedScalar decorator. Also you may try IoCheckedScalar.

If you want to cache the result of the Scalar and make sure it doesn't calculate anything twice, you can use StickyScalar decorator.

There is no thread-safety guarantee.

Since:

0.1

See Also:

StickyScalar, UncheckedScalar, IoCheckedScalar

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Scalar.NoNulls<T> Scalar check for no nulls.

Method Summary

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

Method Detail

value

T value()
 throws Exception

Convert it to the value.

Returns:

The value

Throws:

Exception - If fails