de.thomas_oster.lazysql

Class Lazy<T,E extends Throwable>

java.lang.Object

de.thomas_oster.lazysql.Lazy<T,E>

Type Parameters:

T -

E -

public class Lazy<T,E extends Throwable>
extends Object

Class for a Thread-Safe LazyEvaluated supplier which can throw exceptions

Author:

Thomas Oster (thomas.oster@upstart-it.de)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Lazy.Supplier<T,E extends Throwable>

Constructor Summary

Constructors

Constructor and Description
Lazy(Lazy.Supplier<T,E> load)

Method Summary

Modifier and Type	Method and Description
T	get() Calculates the value and caches the result if no Exception occurs.
T	getValue() Alias for get() for supporting JavaBean Style
static <T,E extends Throwable> Lazy<T,E>	of(Lazy.Supplier<T,E> s)
void	reset()

Methods inherited from class java.lang.Object

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

Constructor Detail

Lazy

public Lazy(Lazy.Supplier<T,E> load)

Method Detail

of

public static <T,E extends Throwable> Lazy<T,E> of(Lazy.Supplier<T,E> s)

get

public T get()
      throws E extends Throwable

Calculates the value and caches the result if no Exception occurs. After that only the cached result is returned until the reset method is called (even if the value was null)

Returns:

the value calculated, even null

Throws:

E - an exception if the supplier method throws one

E extends Throwable

getValue

public T getValue()
           throws E extends Throwable

Alias for get() for supporting JavaBean Style

Returns:

Throws:

E

E extends Throwable

reset

public void reset()