/****************************************************************************
* Copyright (C) 2012 ecsec GmbH.
* All rights reserved.
* Contact: ecsec GmbH (info@ecsec.de)
*
* This file is part of the Open eCard App.
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License version 3.0 as published by the Free Software Foundation
* and appearing in the file LICENSE.GPL included in the packaging of
* this file. Please review the following information to ensure the
* GNU General Public License version 3.0 requirements will be met:
* http://www.gnu.org/copyleft/gpl.html.
*
* Other Usage
* Alternatively, this file may be used in accordance with the terms
* and conditions contained in a signed written agreement between
* you and ecsec GmbH.
*
***************************************************************************/
package org.openecard.gui;
import java.util.concurrent.Future;
import org.openecard.gui.definition.Step;
/**
* Navigator interface to control the execution of the user consent.
* This interface is used in the {@link org.openecard.gui.executor.ExecutionEngine}.
*
* @author Tobias Wich <tobias.wich@ecsec.de>
*/
public interface UserConsentNavigator {
/**
* Checks whether there is a successor step to display.
*
* @return {@code true} if a successor step can be displayed, {@code false} otherwise.
*/
boolean hasNext();
/**
* Redisplays current dialog step.
*
* @return Result of the step. The content of the result is available after the step is finished.
*/
StepResult current();
/**
* Displays next dialog step.
*
* @return Result of the step. The content of the result is available after the step is finished.
*/
StepResult next();
/**
* Displays previous dialog step.
*
* @return Result of the step. The content of the result is available after the step is finished.
*/
StepResult previous();
/**
* Replaces the current step in the step list and displays the new step.
*
* @param step Replacement for the current step.
* @return Result of the step. The content of the result is available after the step is finished.
*/
StepResult replaceCurrent(Step step);
/**
* Replaces the next step in the step list and displays the new step.
*
* @param step Replacement for the next step.
* @return Result of the step. The content of the result is available after the step is finished.
*/
StepResult replaceNext(Step step);
/**
* Replaces the previous step in the step list and displays the new step.
*
* @param step Replacement for the previous step.
* @return Result of the step. The content of the result is available after the step is finished.
*/
StepResult replacePrevious(Step step);
/**
* Sets the action in the navigator which is executed after calling this method.
* The action can be canceled from within the navigator if needed.
*
* @param action Future of the StepAction that is executed next.
*/
void setRunningAction(Future action);
/**
* Closes the open dialog.
*/
void close();
}