com.vaadin.ui.renderers.TextRenderer 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.ui.renderers;
import com.vaadin.shared.ui.grid.renderers.TextRendererState;
import elemental.json.Json;
import elemental.json.JsonValue;
/**
* A renderer for presenting a plain text representation of any value.
* {@link Object#toString()} is used for determining the text to show.
*
* @since 7.4
* @author Vaadin Ltd
*/
public class TextRenderer extends AbstractRenderer {
/**
* Creates a new text renderer that uses "" to represent null
* values.
*/
public TextRenderer() {
this("");
}
/**
* Creates a new text renderer with the given string to represent null
* values.
*
* @param nullRepresentation
* the textual representation of {@code null} value
*/
public TextRenderer(String nullRepresentation) {
super(Object.class, nullRepresentation);
}
@Override
public JsonValue encode(Object value) {
if (value == null) {
return super.encode(null);
}
String stringValue = value.toString();
if (stringValue == null) {
return super.encode(null);
}
return Json.create(stringValue);
}
@Override
public String getNullRepresentation() {
return super.getNullRepresentation();
}
@Override
protected TextRendererState getState() {
return (TextRendererState) super.getState();
}
@Override
protected TextRendererState getState(boolean markAsDirty) {
return (TextRendererState) super.getState(markAsDirty);
}
}