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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. 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
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/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 packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [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.component;
/**
* <p class="changed_added_2_1">This interface is implemented by classes
* that need to save state that is expected to be available only within the scope
* of the current request.</p>
*
* <div class="changed_added_2_1">
*
* <p>An implementor <strong>must</strong> implement both {@link
* #saveTransientState} and {@link #restoreTransientState} methods in this class, since
* these two methods have a tightly coupled contract between themselves.
* In other words, if there is an inheritance hierarchy, it is not
* permissible to have the {@link #saveTransientState} and {@link #restoreTransientState}
* methods reside at different levels of the hierarchy.</p>
*
* <p>An example of transient state is the "submitted" property on forms.</p>
*
* </div>
*
* @since 2.1
*/
public interface TransientStateHolder
{
/**
* <p class="changed_added_2_1">Return the object containing related "transient states".
* that could be used later to restore the "transient state".<p>
*
* @param context
* @return object containing transient values
* @since 2.1
*/
public java.lang.Object saveTransientState(javax.faces.context.FacesContext context);
/**
* <p class="changed_added_2_1">Restore the "transient state" using the object passed as
* state.</p>
*
* <p class="changed_added_2_1">If the <code>state</code>
* argument is <code>null</code> clear any previous transient
* state if any and return.</p>
*
* @param context
* @param state the object containing transient values
* @since 2.1
*/
public void restoreTransientState(javax.faces.context.FacesContext context,
java.lang.Object state);
}
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