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/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.faces.component;
/**
*
* Components that want to leverage the partial state saving feature must implement this interface instead of
* implementing {@link StateHolder}, from which this interface inherits.
*
*
* @since 2.0
*/
public interface PartialStateHolder extends StateHolder {
/**
*
* The runtime must ensure that the {@link #markInitialState} method is called on each instance of this interface in the
* view at the appropriate time to indicate the component is in its initial state. The implementor of the interface must
* ensure that {@link #initialStateMarked} returns true from the time markInitialState() is
* called until {@link #clearInitialState} is called, after which time initialStateMarked() must return
* false. Also, during the time that the instance returns true from
* initialStateMarked(), the implementation must return only the state that has changed in its
* implementation of {@link StateHolder#saveState}.
*
*
* @since 2.0
*/
void markInitialState();
/**
*
* Return true if delta state changes are being tracked, otherwise false
*
*
* @return true if the initial state is marked, false otherwise.
* @since 2.0
*/
boolean initialStateMarked();
/**
*
* Reset the PartialStateHolder to a non-delta tracking state.
*
*
* @since 2.0
*/
void clearInitialState();
}