/usr/include/trilinos/Teko_RequestCallback.hpp is in libtrilinos-teko-dev 12.4.2-2.
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//
// Teko: A package for block and physics based preconditioning
// Copyright 2010 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
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// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
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// 2. Redistributions in binary form must reproduce the above copyright
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// documentation and/or other materials provided with the distribution.
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*/
#ifndef __Teko_RequestCallback_hpp__
#define __Teko_RequestCallback_hpp__
#include "Teko_RequestMesg.hpp"
namespace Teko {
/** Base class that basically describes a sub
* set of functonality for a listener. The application
* should derive off <code>RequestCallback</code>.
*/
class RequestCallbackBase {
public:
virtual ~RequestCallbackBase() {}
/** Does this object satisfy the request?
*
* \returns True if the object can handle the request.
*/
virtual bool handlesRequest(const RequestMesg &) = 0;
/** Let the object know, that there is a request pending. This
* permits the application code to ``prepare'' to satisfy the
* request. This only must be called on construction of the
* preconditioner factory. If the result of the request
* must be constructed multiple times, that is incombant on
* the developer of the callback.
*
* \note No assumption of <code>handlesRequest</code> being true
* for this message is made. It is up to the application to
* verify this.
*/
virtual void preRequest(const RequestMesg &) = 0;
};
/** Primary reference point for the application to
* derive off for a request callback. This one
* has a request function that returns the specified
* type of data. Note that the type may be a reference
* counted pointer (<code>Teuchos::RCP</code> for instance)
* if a persistant value is needed.
*/
template <typename DataT>
class RequestCallback : public RequestCallbackBase {
public:
virtual ~RequestCallback() {}
/** Satisfy a request. Similar to <code>preRequest</code>
* no assumption on the response to <code>handlesRequest</code>
* is made. Again its up to the user to satisfy this.
*/
virtual DataT request(const RequestMesg &) = 0;
/** Does this object satisfy the request?
*
* \returns True if the object can handle the request.
*/
virtual bool handlesRequest(const RequestMesg &) = 0;
};
}
#endif
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