/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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#ifndef INCLUDED_SD_SOURCE_UI_INC_TOOLS_ASYNCHRONOUSTASK_HXX
#define INCLUDED_SD_SOURCE_UI_INC_TOOLS_ASYNCHRONOUSTASK_HXX

namespace sd { namespace tools {

/** Interface for the asynchronous execution of a task.  This interface
    allows an controller to run the task either timer based with a fixed
    amount of time between the steps or thread based one step right after
    the other.
*/
class AsynchronousTask
{
public:
    /** Run the next step of the task.  After HasNextStep() returns false
        this method should ignore further calls.
    */
    virtual void RunNextStep (void) = 0;

    /** Return <TRUE/> when there is at least one more step to execute.
        When the task has been executed completely then <FALSE/> is
        returned.
    */
    virtual bool HasNextStep (void) = 0;

protected:
    ~AsynchronousTask() {}
};

} } // end of namespace ::sd::tools

#endif

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