Package com.linecorp.armeria.common.util

Class AbstractUnwrappable<T extends Unwrappable>

java.lang.Object

com.linecorp.armeria.common.util.AbstractUnwrappable<T>

Type Parameters:

T - the type of the object being decorated

All Implemented Interfaces:

Unwrappable

Direct Known Subclasses:

BackoffWrapper, DecoratingClient, DecoratingService, UserClient

public abstract class AbstractUnwrappable<T extends Unwrappable>
extends Object
implements Unwrappable

Skeletal Unwrappable implementation.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractUnwrappable(T delegate)	Creates a new decorator with the specified delegate.

Method Summary

Modifier and Type	Method	Description
<U> U	as(Class<U> type)	Unwraps this object into the object of the specified type.
protected <U extends T> U	delegate()	Returns the object being decorated.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

AbstractUnwrappable

protected AbstractUnwrappable(T delegate)

Creates a new decorator with the specified delegate.

Method Details

delegate

protected final <U extends T> U delegate()

Returns the object being decorated.

as

public final <U> U as(Class<U> type)

Description copied from interface: Unwrappable

Unwraps this object into the object of the specified type. Use this method instead of an explicit downcast. For example:

 class Foo {}

 class Bar<T> extends AbstractWrapper<T> {
     Bar(T delegate) {
         super(delegate);
     }
 }

 class Qux<T> extends AbstractWrapper<T> {
     Qux(T delegate) {
         super(delegate);
     }
 }

 Qux qux = new Qux(new Bar(new Foo()));
 Foo foo = qux.as(Foo.class);
 Bar bar = qux.as(Bar.class);
 

Specified by:

as in interface Unwrappable

Parameters:

type - the type of the object to return

Returns:

the object of the specified type if found, or null if not found.

toString

public String toString()

Overrides:

toString in class Object