/*
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 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 acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", 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 names without prior written
 *    permission of the Apache Group.
 *
 * 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 es.ejie.frmk.presentacion.iu.taglib.html;


import javax.servlet.jsp.JspException;

import org.apache.struts.util.RequestUtils;
import org.apache.struts.util.ResponseUtils;

import es.ejie.frmk.infraestructura.traza.Q70TraceLevel;
import es.ejie.frmk.infraestructura.traza.Q70Traza;


/**
 * Custom tag for input fields of type "hidden".
 *
 * @author Craig R. McClanahan
 * @version 1.0
 */

public class Q70HiddenTag extends Q70BaseFieldTag 
{
	/**
	 * Instancia del log de trazas
	 */
	private static Q70Traza tr = Q70Traza.getSingleton();


    // ----------------------------------------------------------- Constructors

    /** 
     * Construct a new instance of this tag.
     */
    public Q70HiddenTag() {

	    super();
	    this.type = "hidden";

    }


    // ------------------------------------------------------------- Properties


    /**
     * Should the value of this field also be rendered to the response?
     */
    protected boolean write = false;

    public boolean getWrite() {
        return (this.write);
    }

    public void setWrite(boolean write) {
        this.write = write;
    }


    // --------------------------------------------------------- Public Methods


    /**
     * Generate the required input tag, followed by the optional rendered text.
     * Support for <code>write</code> property since Struts 1.1.
     *
     * @exception JspException if a JSP exception has occurred
     */
    public int doStartTag() throws JspException 
    {
		if (tr.isTraceActive())	tr.trace(COMPONENTE, Q70TraceLevel.DEBUG, "Generando tag de tipo " + this.getClass().toString());

        // Render the <html:input type="hidden"> tag as before
        super.doStartTag();

        // Is rendering the value separately requested?
        if (!write) {
			// Devuelve EVAL_BODY_TAG. Es un int para evitar errores de deprecacion 
			// en compilacion al usar j2ee 1.3
			return 2;            
        }


        // Calculate the value to be rendered separately
        // * @since Struts 1.1
        String results = null;
        if (value != null) {
            results = ResponseUtils.filter(value);
        } else {
            Object value = RequestUtils.lookup(pageContext, name, property,
                                               null);
            if (value == null) {
                results = "";
            } else {
                results = ResponseUtils.filter(value.toString());
            }
        }

        // Render the result to the output writer
        ResponseUtils.write(pageContext, results);
        
		// Devuelve EVAL_BODY_TAG. Es un int para evitar errores de deprecacion 
		// en compilacion al usar j2ee 1.3        
		return 2;
    }


    /**
     * Release any acquired resources.
     */
    public void release() {

        super.release();
        write = false;

    }


}
