/**
 * Normalises and cleans up HTML to convert it to XML semantics.
 */
public class HtmlToXmlJavadocLexer implements JavadocLexer {
    private final JavadocLexer lexer;
    private final Set<String> blockElements = new HashSet<String>();
    private final Set<String> blockContent = new HashSet<String>();

    public HtmlToXmlJavadocLexer(JavadocLexer lexer) {
        this.lexer = lexer;
        blockElements.add("p");

        "text<h2>header</h2>text"   | "<p>text</p><h2>header</h2><p>text</p>"
    }

    def parse(String source) {
        def lexer = new HtmlToXmlJavadocLexer(new BasicJavadocLexer(new JavadocScanner(source)))
        def result = new StringBuilder()
        lexer.visit(new JavadocLexer.TokenVisitor() {
            @Override
            void onStartHtmlElement(String name) {