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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 com.vaadin.flow.data.provider.DataGenerator;
import com.vaadin.flow.data.provider.DataKeyMapper;
import com.vaadin.flow.dom.Element;
import com.vaadin.flow.function.ValueProvider;
/**
* Base class for all renderers - classes that take a given model object as
* input and handles their rendering to the client side when requested.
*
* @author Vaadin Ltd
*
* @param
* the type of the input object used inside the template
*
* @see ValueProvider
* @see ComponentRenderer
* @see LitRenderer
*/
public abstract class Renderer implements Serializable {
private final String DEFAULT_RENDERER_NAME = "renderer";
/**
* Registers a renderer function to the given container element. Creates the
* setup to handle rendering of individual data items as requested by the
* renderer function invocation. The renderer function name defaults to
* "renderer".
*
* @param container
* the element which accepts the renderer function on the client.
* @param keyMapper
* mapper used internally to fetch items by key and to provide
* keys for given items.
* @return the context of the rendering, that can be used by the components
* to provide extra customization
*/
public Rendering render(Element container,
DataKeyMapper keyMapper) {
return render(container, keyMapper, DEFAULT_RENDERER_NAME);
}
/**
* Registers a renderer function with the given name to the given container
* element. Creates the setup to handle rendering of individual data items
* as requested by the renderer function invocation.
*
* @param container
* the element which accepts the renderer function on the client.
* @param keyMapper
* mapper used internally to fetch items by key and to provide
* keys for given items.
* @param rendererName
* name of the renderer function the container element accepts
* @return the context of the rendering, that can be used by the components
* to provide extra customization
*/
public abstract Rendering render(Element container,
DataKeyMapper keyMapper, String rendererName);
}
