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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.xpath;

import javax.xml.transform.TransformerException;

import org.apache.xpath.XPathContext;
import org.apache.xpath.functions.FunctionDef1Arg;
import org.apache.xpath.objects.XObject;
import org.apache.xpath.objects.XString;

/**
 * Custom XPath function to convert the argument to lower case (using the default locale
 * as in {@link java.lang.String#toLowerCase()}.
 *
 * @version $Revision: 6204 $
 * @author Marc Guillemot
 * @author Ahmed Ashour
 */
public class LowerCaseFunction extends FunctionDef1Arg {

    /**
     * {@inheritDoc}
     */
    @Override
    public XObject execute(final XPathContext xctxt) throws TransformerException {
        return new XString(((XString) getArg0AsString(xctxt)).str().toLowerCase());
    }
}