com.vaadin.util.CurrentInstanceFallbackResolver Maven / Gradle / Ivy
/*
* Copyright (C) 2000-2024 Vaadin Ltd
*
* This program is available under Vaadin Commercial License and Service Terms.
*
* See for the full
* license.
*/
package com.vaadin.util;
import java.io.Serializable;
/**
* Fallback that is used to revolve current instances when they are not
* available by regular means.
*
* This interface is used internally by the framework and it's not meant for
* public usage.
*
* @author Vaadin Ltd.
*
* @param
* the type of the instances returned by this resolver
*
* @see CurrentInstance#get(Class)
* @see CurrentInstance#defineFallbackResolver(Class,
* CurrentInstanceFallbackResolver)
*
* @since 8.5.2
*
*/
public interface CurrentInstanceFallbackResolver extends Serializable {
/**
* Resolves a current instance for the type {@code T}.
*
* @return the current instance, or null if none can be found
*/
T resolve();
}