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/*
Copyright (C) 2001 Stefan Westerfeld
[email protected]
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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef ARTS_MCOP_DYNAMICSKELETON_H
#define ARTS_MCOP_DYNAMICSKELETON_H
#include "arts_export.h"
#include "object.h"
/*
* BC - Status (2002-03-08): DynamicSkeletonBase, DynamicSkeleton
*
* Will be kept binary compatible (using d ptr).
*/
namespace Arts {
class DynamicSkeletonData;
class ARTS_EXPORT DynamicSkeletonBase {
private:
DynamicSkeletonData *d;
protected:
DynamicSkeletonBase();
/* <obsolete compatibility code> */
DynamicSkeletonBase(Object_skel *skel,
const std::string& interfacename,
const std::string& interfacenameparent);
/* </obsolete compatibility code> */
virtual ~DynamicSkeletonBase();
void _dsInit(Object_skel *skel, const std::string& interfacename,
const std::string& interfacenameparent);
std::string _dsInterfaceName();
bool _dsIsCompatibleWith(const std::string& interfacename);
void _dsBuildMethodTable();
public:
/**
* process is called whenever you get a request that you need to implement
* dynamically
*
* @param methodID contains the ID of the method that you need to
* implement - you can get the full signature by calling
* getMethodDef
*
* @param request contains the marshalled parameters
*
* @param result is for the return code - if your method returns a
* value, you need to write the it in the result Buffer
*/
virtual void process(long methodID, Buffer *request, Buffer *result) = 0;
};
/**
* DynamicSkeleton is used to dynamically implement an interface (i.e. without
* static type bindings as generated by the MCOP idl compiler.
*
* You will always implement a mixed version: mcopidl generated skeletons up
* to a certain point, and above this, dynamically implemented interfaces.
* So you'll inherit DynamicSkeleton<Static_skel> and give the interface you
* want to implement dynamically as argument. Suppose your idl file looks
* like
*
* <pre>
* interface A { void a(); };
* interface B : A { void b(); };
* </pre>
*
* And you want to implement interface A "classic" (i.e. with mcopidl generated
* virtual void a()) and interface B "dynamic", you would do
*
* <pre>
* typedef Arts::DynamicSkeleton<A_skel> A_dskel; // convenient with typedef
*
* class B_impl : public A_dskel {
* public:
* B_impl() : A_dskel("B") { // we dynamically implement the B interface
* }
* void a() { // through A_skel
* arts_info("a called");
* }
* void process(long methodID, Arts::Buffer *request, Arts::Buffer *result)
* {
* const Arts::MethodDef& methodDef = getMethodDef(methodID);
*
* if(methodDef.name == "b")
* arts_info("b called!");
* else
* arts_fatal("Unknown method '%s' called");
* }
* };
* </pre>
*/
template<class Parent_skel>
class DynamicSkeleton : virtual public Parent_skel, public DynamicSkeletonBase
{
public:
/**
* constructor
*/
DynamicSkeleton(const std::string& interface)
{
_dsInit(this, interface, Parent_skel::_interfaceNameSkel());
}
/**
* getMethodDef returns a MethodDef structure for a given methodID - it
* is quite useful if you implement process
*
* <pre>
* void process(long methodID, Arts::Buffer *request, Arts::Buffer *result)
* {
* const Arts::MethodDef& methodDef = getMethodDef(methodID);
*
* if(methodDef.name == "hello") // the method named hello was called
* printf("Hello!\n");
* else // method with other name was called
* arts_fatal("Method '%s' not implemented",methodDef.name.c_str());
* }
* </pre>
*/
const MethodDef& getMethodDef(long methodID) {
return this->_dsGetMethodDef(methodID);
}
/*-- reimplemented from Arts::Object_skel: --*/
std::string _interfaceName() {
return _dsInterfaceName();
}
bool _isCompatibleWith(const std::string& interfacename) {
if(_dsIsCompatibleWith(interfacename)) return true;
return Parent_skel::_isCompatibleWith(interfacename);
}
void _buildMethodTable() {
Parent_skel::_buildMethodTable();
_dsBuildMethodTable();
}
};
}
#endif /* ARTS_MCOP_DYNAMICSKELETON_H */
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