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commonmark-java extension for GFM strikethrough using ~~ (GitHub Flavored Markdown)

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package org.commonmark.ext.gfm.strikethrough;

import org.commonmark.Extension;
import org.commonmark.renderer.text.TextContentRenderer;
import org.commonmark.renderer.text.TextContentNodeRendererContext;
import org.commonmark.renderer.text.TextContentNodeRendererFactory;
import org.commonmark.ext.gfm.strikethrough.internal.StrikethroughDelimiterProcessor;
import org.commonmark.ext.gfm.strikethrough.internal.StrikethroughHtmlNodeRenderer;
import org.commonmark.ext.gfm.strikethrough.internal.StrikethroughTextContentNodeRenderer;
import org.commonmark.renderer.html.HtmlRenderer;
import org.commonmark.renderer.html.HtmlNodeRendererContext;
import org.commonmark.renderer.html.HtmlNodeRendererFactory;
import org.commonmark.parser.Parser;
import org.commonmark.renderer.NodeRenderer;

/**
 * Extension for GFM strikethrough using ~~ (GitHub Flavored Markdown).
 * 
 * Create it with {@link #create()} and then configure it on the builders
 * ({@link org.commonmark.parser.Parser.Builder#extensions(Iterable)},
 * {@link HtmlRenderer.Builder#extensions(Iterable)}).
 * 
 * 
 * The parsed strikethrough text regions are turned into {@link Strikethrough} nodes.
 * 
 */
public class StrikethroughExtension implements Parser.ParserExtension, HtmlRenderer.HtmlRendererExtension,
        TextContentRenderer.TextContentRendererExtension {

    private StrikethroughExtension() {
    }

    public static Extension create() {
        return new StrikethroughExtension();
    }

    @Override
    public void extend(Parser.Builder parserBuilder) {
        parserBuilder.customDelimiterProcessor(new StrikethroughDelimiterProcessor());
    }

    @Override
    public void extend(HtmlRenderer.Builder rendererBuilder) {
        rendererBuilder.nodeRendererFactory(new HtmlNodeRendererFactory() {
            @Override
            public NodeRenderer create(HtmlNodeRendererContext context) {
                return new StrikethroughHtmlNodeRenderer(context);
            }
        });
    }

    @Override
    public void extend(TextContentRenderer.Builder rendererBuilder) {
        rendererBuilder.nodeRendererFactory(new TextContentNodeRendererFactory() {
            @Override
            public NodeRenderer create(TextContentNodeRendererContext context) {
                return new StrikethroughTextContentNodeRenderer(context);
            }
        });
    }
}