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/*
* Copyright 2000-2024 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.flow.data.renderer;
import java.io.Serializable;
import java.util.Optional;
import com.vaadin.flow.data.provider.DataGenerator;
import com.vaadin.flow.dom.Element;
import com.vaadin.flow.shared.Registration;
/**
* Defines the context of a given {@link Renderer} when building the output
* elements. Components that support Renderers can use the context to customize
* the rendering according to their needs.
*
* @author Vaadin Ltd
*
* @param
* the type of the object model
*
* @see Renderer#render(Element, com.vaadin.flow.data.provider.DataKeyMapper)
*/
public interface Rendering extends Serializable {
/**
* Gets a {@link DataGenerator} associated with the renderer. The
* DataGenerator is used in components that support in asynchronous loading
* of items.
*
* @return the associated DataGenerator, if any
*/
Optional> getDataGenerator();
/**
* Gets a {@link Registration} that can be used to clean up resources
* associated with the renderer when it's no longer used.
*
* @return the Registration
* @see Registration#remove
*/
default Registration getRegistration() {
return () -> {
};
}
}
