jakarta.faces.component.TransientStateHelper Maven / Gradle / Ivy
/*
* 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;
/**
*
* Define a Map-like contract that makes it easier for components to implement
* {@link TransientStateHolder}. Each {@link UIComponent} in the view will return an implementation of this interface
* from its {@link UIComponent#getTransientStateHelper} method.
*
*
*
*
*
* The values retrieved or saved through {@link #getTransient} or {@link #putTransient} will not be preserved between
* requests.
*
*
*
*
* @since 2.1
*
*/
public interface TransientStateHelper extends TransientStateHolder {
/**
*
* Return the value currently associated with the specified key if any.
*
*
* @param key the key for which the value should be returned.
* @return the stored value.
* @since 2.1
*/
Object getTransient(Object key);
/**
*
* Performs the same logic as {@link #getTransient} } but if no value is found, this will return the specified
* defaultValue
*
*
* @param key the key for which the value should be returned.
* @param defaultValue the value to return if no value is found in the call to get().
* @return the stored value.
* @since 2.1
*/
Object getTransient(Object key, Object defaultValue);
/**
*
* Return the previously stored value and store the specified key/value pair. This is intended to store data that would
* otherwise reside in an instance variable on the component.
*
*
* @param key the key for the value
* @param value the value
* @return the previously stored value
* @since 2.1
*/
Object putTransient(Object key, Object value);
}