org.zalando.testmailserver.util

Class LazyVar<T>

java.lang.Object

org.zalando.testmailserver.util.LazyVar<T>

All Implemented Interfaces:

Supplier<T>

public class LazyVar<T>
extends Object
implements Supplier<T>

A variable/reference that can be set once to a non-null value. A read access will return that value or throw an IllegalStateException if it has not been set yet. Purpose: Allow initialization by setters after construction, but provide read-only semantics and thread safety.

Constructor Summary

Constructors

Constructor and Description
LazyVar(String name)

Method Summary

Modifier and Type	Method and Description
T	get()
T	getOptional()
void	set(T value)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

LazyVar

public LazyVar(String name)

Method Detail

get

public T get()
      throws IllegalStateException

Specified by:

get in interface Supplier<T>

Throws:

IllegalStateException

getOptional

@Nullable
public T getOptional()

set

public void set(T value)
         throws IllegalStateException

Throws:

IllegalStateException

toString

public String toString()

Overrides:

toString in class Object