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/*
Copyright (C) 2000 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef MCOP_DYNAMICREQUEST_H
#define MCOP_DYNAMICREQUEST_H
#include "buffer.h"
#include "anyref.h"
#include <vector>
#include <string>
#include "arts_export.h"
/*
* BC - Status (2002-03-08): DynamicRequest
*
* Has to be kept binary compatible (use d ptr).
*/
namespace Arts {
class Object;
class Type;
class DynamicRequestPrivate;
/**
* The DynamicRequest class can be used to invoke requests on objects, without
* using IDL generated code to do so (i.e. you can talk to objects without
* having to know their interfaces at compile time)
*
* Suppose you have the interface
*
* interface SimpleSoundServer {
* [...]
* long play(string file); // plays a file and returns an id
* [...]
* };
*
* And server is of type SimpleSoundServer, you can write in your C++ code:
*
* long id;
* if(DynamicRequest(server).method("play").param("/tmp/bong.wav").invoke(id))
* {
* cout << "playing file now, id is " << id << endl;
* }
* else
* {
* cout << "something went wrong with the dynamic request" << endl;
* }
*
* You can of course also add parameters and other information one-by-one:
*
* DynamicRequest request(server);
* request.method("play");
* request.param("/tmp/bong.wav");
*
* long id;
* if(request.invoke(id)) cout << "success" << endl;
*/
class ARTS_EXPORT DynamicRequest {
public:
/**
* creates a dynamic request which will be sent to a specific object
*/
DynamicRequest(const Object& object);
/**
* deletes the dynamic request
*/
~DynamicRequest();
/**
* says that the following method will be a oneway method, for example
*
* DynamicRequest(someobject).oneway().method("stop").invoke();
*/
DynamicRequest& oneway();
/**
* sets the method to invoke
*/
DynamicRequest& method(const std::string& method);
/**
* adds a parameter to the call
*/
DynamicRequest& param(const AnyConstRef& value);
/**
* executes the request, call this if you don't expect a return type
*
* @returns true if the request could be performed
*/
bool invoke();
/**
* executes the request: this version accepts an AnyRef& as result type
*
* @returns true if the request could be performed
*/
bool invoke(const AnyRef& result);
/*
* TODO: Some types can't yet be used in dynamic requests, these are
* enum, sequence<enum>, type, sequence<type>, object, sequence<object>
*/
private:
DynamicRequestPrivate *d;
};
}
#endif /* MCOP_DYNAMICREQUEST_H */
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