/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Axis" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.jboss.axis.encoding.ser;

import org.jboss.axis.encoding.SerializationContext;
import org.jboss.axis.utils.Messages;
import org.jboss.axis.wsdl.fromJava.Types;
import org.jboss.logging.Logger;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;

import javax.xml.namespace.QName;
import java.io.IOException;

/**
 * Serializer for a JAX-RPC enums.
 *
 * @author Rich Scheuerle <scheu@us.ibm.com>
 * @author Sam Ruby <rubys@us.ibm.com>
 */
public class EnumSerializer extends SimpleSerializer
{
   private static Logger log = Logger.getLogger(EnumSerializer.class.getName());

   private java.lang.reflect.Method toStringMethod = null;

   public EnumSerializer(Class javaType, QName xmlType)
   {
      super(javaType, xmlType);
   }

   /**
    * Serialize an enumeration
    */
   public void serialize(QName name, Attributes attributes,
                         Object value, SerializationContext context)
           throws IOException
   {
      context.startElement(name, attributes);
      context.writeString(getValueAsString(value, context));
      context.endElement();
   }

   public String getValueAsString(Object value, SerializationContext context)
   {
      // Invoke the toString method on the enumeration class and
      // write out the result as a string.
      try
      {
         if (toStringMethod == null)
         {
            toStringMethod = javaType.getMethod("toString", null);
         }
         return (String)toStringMethod.invoke(value, null);
      }
      catch (Exception e)
      {
         log.error(Messages.getMessage("exception00"), e);
      }
      return null;
   }

   /**
    * Return XML schema for the specified type, suitable for insertion into
    * the &lt;types&gt; element of a WSDL document, or underneath an
    * &lt;element&gt; or &lt;attribute&gt; declaration.
    *
    * @param javaType the Java Class we're writing out schema for
    * @param types    the Java2WSDL Types object which holds the context
    *                 for the WSDL being generated.
    * @return a type element containing a schema simpleType/complexType
    * @see org.jboss.axis.wsdl.fromJava.Types
    */
   public Element writeSchema(Class javaType, Types types) throws Exception
   {
      // Use Types helper method.
      return types.writeEnumType(xmlType, javaType);
   }
}