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Vaadin is a web application framework for Rich Internet Applications (RIA). Vaadin enables easy development and maintenance of fast and secure rich web applications with a stunning look and feel and a wide browser support. It features a server-side architecture with the majority of the logic running on the server. Ajax technology is used at the browser-side to ensure a rich and interactive user experience.

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/*
 * Copyright (c) 2002-2011 Gargoyle Software Inc.
 *
 * 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.gargoylesoftware.htmlunit.html;

import java.util.Map;

import com.gargoylesoftware.htmlunit.SgmlPage;

/**
 * Wrapper for the HTML element "input" of type "hidden".
 *
 * @version $Revision: 6204 $
 * @author Mike Bowler
 * @author David K. Taylor
 * @author Christian Sell
 * @author Daniel Gredler
 * @author Marc Guillemot
 * @author Ahmed Ashour
 */
public class HtmlHiddenInput extends HtmlInput {

    /**
     * Creates an instance.
     *
     * @param namespaceURI the URI that identifies an XML namespace
     * @param qualifiedName the qualified name of the element type to instantiate
     * @param page the page that contains this element
     * @param attributes the initial attributes
     */
    HtmlHiddenInput(final String namespaceURI, final String qualifiedName, final SgmlPage page,
            final Map attributes) {
        super(namespaceURI, qualifiedName, page, attributes);
    }

    /**
     * @see com.gargoylesoftware.htmlunit.html.HtmlInput#asText()
     * @return an empty string as an hidden field is not visible
     */
    // we need to preserve this method as it is there since many versions with the above documentation.
    @Override
    public String asText() {
        return "";
    }
}