Start line:  
End line:  

Snippet Preview

Snippet HTML Code

Stack Overflow Questions
   * $Id:,v 1.19 2007/04/27 22:00:11 ofung Exp $
   * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
  * The contents of this file are subject to the terms of either the GNU
  * General Public License Version 2 only ("GPL") or the Common Development
  * and Distribution License("CDDL") (collectively, the "License").  You
  * may not use this file except in compliance with the License. You can obtain
  * a copy of the License at
  * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
  * language governing permissions and limitations under the License.
  * When distributing the software, include this License Header Notice in each
  * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
  * Sun designates this particular file as subject to the "Classpath" exception
  * as provided by Sun in the GPL Version 2 section of the License file that
  * accompanied this code.  If applicable, add the following below the License
  * Header, with the fields enclosed by brackets [] replaced by your own
  * identifying information: "Portions Copyrighted [year]
  * [name of copyright owner]"
  * Contributor(s):
  * If you wish your version of this file to be governed by only the CDDL or
  * only the GPL Version 2, indicate your decision by adding "[Contributor]
  * elects to include this software in this distribution under the [CDDL or GPL
  * Version 2] license."  If you don't indicate a single choice of license, a
  * recipient has the option to distribute your version of this file under
  * either the CDDL, the GPL Version 2 or to extend the choice of license to
  * its licensees as provided above.  However, if you add GPL Version 2 code
  * and therefore, elected the GPL Version 2 license, then the option applies
  * only if the new code is made subject to such option by the copyright
  * holder.
 package javax.faces.webapp;

Tag implementation that adds an attribute with a specified name and String value to the component whose tag it is nested inside, if the component does not already contain an attribute with the same name. This tag creates no output to the page currently being created.

The Faces implementation must now provide the implementation for this class.
 public class AttributeTag extends TagSupport {
     // ---------------------------------------------------------- Static Members
     private static final long serialVersionUID = -7782950243436672334L;
     // ------------------------------------------------------------- Attributes


The name of the attribute to be created, if not already present.

     private String name = null;


Set the attribute name.

name The new attribute name
     public void setName(String name) {
         this. = name;


The value to be associated with this attribute, if it is created.

     private String value = null;


Set the attribute value.

value The new attribute value
    public void setValue(String value) {
        this. = value;
    // --------------------------------------------------------- Public Methods


Register the specified attribute name and value with the javax.faces.component.UIComponent instance associated with our most immediately surrounding UIComponentTag instance, if this javax.faces.component.UIComponent does not already have a value for the specified attribute name.

javax.servlet.jsp.JspException if a JSP error occurs
    public int doStartTag() throws JspException {
        // Locate our parent UIComponentTag
        UIComponentClassicTagBase tag =
        if (tag == null) { // PENDING - i18n
            throw new JspException("Not nested in a UIComponentTag");
        // Add this attribute if it is not already defined
        UIComponent component = tag.getComponentInstance();
        if (component == null) { // PENDING - i18n
            throw new JspException("No component associated with UIComponentTag");
        FacesContext context = FacesContext.getCurrentInstance();
        ExpressionFactory exprFactory =
        ELContext elContext = context.getELContext();
        String nameVal = (String
        Object valueVal =
        if (component.getAttributes().get(nameVal) == null) {
        return ();
    public int doEndTag() throws JspException {
	return ();


Release references to any acquired resources.

    public void release() {
        this. = null;
        this. = null;
New to GrepCode? Check out our FAQ X