Package overit.geocall.util

Class Lazy<T>

java.lang.Object

overit.geocall.util.Lazy<T>

All Implemented Interfaces:

Serializable

public class Lazy<T>
extends Object
implements Serializable

Lazy is a simple in-memory caching class. The Lazy class suits the caching of database calls, complex object graph building routines and web service calls that should be cached for performance.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Lazy.SerializableSupplier<T>	Simple serializable supplier interface.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final Serializable	NULL
protected final Lazy.SerializableSupplier<T>	supplier
protected Object	value

Constructor Summary

Constructors

Constructor	Description
Lazy()	Creates an empty Lazy.
Lazy(Lazy.SerializableSupplier<T> supplier)	Creates a Lazy object with the defined Lazy.SerializableSupplier.

Method Summary

Modifier and Type	Method	Description
final T	get()	Returns the value retrieved from the supplier.
final T	get(Supplier<T> supplier, T def)	Returns the value retrieved from the Lazy.SerializableSupplier.
final T	get(T def)	Returns the value retrieved from the supplier.

Methods inherited from class java.lang.Object

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

Field Details

NULL

protected static final Serializable NULL

supplier

protected final Lazy.SerializableSupplier<T> supplier

value

protected transient Object value

Constructor Details

Lazy

public Lazy()

Creates an empty Lazy.

Lazy

public Lazy(Lazy.SerializableSupplier<T> supplier)

Creates a Lazy object with the defined Lazy.SerializableSupplier.

Parameters:

supplier - The Lazy.SerializableSupplier.

Method Details

get

public final T get()

Returns the value retrieved from the supplier.

Returns:

The value retrieved from the supplier.

get

public final T get(T def)

Returns the value retrieved from the supplier.

Parameters:

def - Default value to return.

Returns:

The value retrieved from the supplier.

get

public final T get(Supplier<T> supplier,
 T def)

Returns the value retrieved from the Lazy.SerializableSupplier.

Parameters:

supplier - The Lazy.SerializableSupplier.

def - The default value to return in case the value retrieved from the Lazy.SerializableSupplier is null.

Returns:

The value retrieved from the Lazy.SerializableSupplier.