/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.
 */
/*
 * $Id$
 */
package org.apache.xpath.functions.string;

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

/**
 * Implementation of the upper-case() function.
 * 
 * @author Mukul Gandhi <mukulg@apache.org>
 * 
 * @xsl.usage advanced
 */
public class FuncUpperCase extends FunctionDef1Arg
{
    
     private static final long serialVersionUID = 2596924943524147578L;
     
     /**
 	  * Class constructor.
 	  */
      public FuncUpperCase() {
 	      m_defined_arity = new Short[] { 1 };
      }

     /**
       * Evaluate the function. The function must return a valid object.
       * 
       * @param xctxt The current execution context.
       * @return A valid XObject.
       *
       * @throws javax.xml.transform.TransformerException
       */
      public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
      {
          String strValueOfArg = (getArg0AsString(xctxt)).toString();
    
          return new XString((new String(strValueOfArg)).toUpperCase());
      }
}
