de.team33.patterns.lazy.e1

Class XLazy<T,X extends Exception>

java.lang.Object

de.team33.patterns.lazy.e1.XLazy<T,X>

All Implemented Interfaces:

XSupplier<T,X>

public class XLazy<T,X extends Exception>
extends Object
implements XSupplier<T,X>

Implements an XSupplier that provides a virtually fixed value. This value is only actually determined when it is accessed for the first time.

This implementation ensures that the originally defined initialization code is called at most once, even if there is concurrent access from multiple threads, unless the initialization attempt causes an exception.

Once the value is established, unnecessary effort to synchronize competing accesses is avoided.

Constructor Summary

Constructors

Constructor and Description
XLazy(XSupplier<T,X> initial) Initializes a new instance giving a supplier that defines the intended initialization of the represented value.

Method Summary

Modifier and Type	Method and Description
T	get() Executes the originally defined initialization code on the first call and returns its result on that and every subsequent call without calling the supplier again.

Methods inherited from class java.lang.Object

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

Constructor Detail

XLazy

public XLazy(XSupplier<T,X> initial)

Initializes a new instance giving a supplier that defines the intended initialization of the represented value.

Method Detail

get

public final T get()
            throws X extends Exception

Executes the originally defined initialization code on the first call and returns its result on that and every subsequent call without calling the supplier again.

Specified by:

get in interface XSupplier<T,X extends Exception>

Throws:

X extends Exception