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/* -*- c++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// be_operation_strategy.h
//
// = DESCRIPTION
// Strategy to cover differences between operations, e.g.
// the sendc_ and raise_ operations in the AMI spec.
//
// = AUTHOR
// Michael Kircher
//
// ============================================================================
#ifndef TAO_BE_OPERATION_STRATEGY_H
#define TAO_BE_OPERATION_STRATEGY_H
#include "be_codegen.h"
class be_operation;
// Base class for operation level strategies.
class be_operation_strategy
{
public:
enum Strategy_Kind
{
DEFAULT = 0,
AMI_SENDC,
AMI_HANDLER_REPLY_STUB,
AMI_EXCEPTION_HOLDER_RAISE
};
be_operation_strategy (be_operation *node,
Strategy_Kind strategy_type);
virtual ~be_operation_strategy (void);
int strategy_type (void);
// Return the type of the strategy.
virtual TAO_CodeGen::CG_STATE next_state (
TAO_CodeGen::CG_STATE current_state,
int is_extra_state = 0
) = 0;
// Change the state if necessary.
virtual int has_extra_code_generation (TAO_CodeGen::CG_STATE current_state);
// Returns true if we have to genrate extra code.
virtual be_operation *marshaling (void);
// Returns the operation containing special marshaling information,
// this makes sense if not all arguments get marshaled, e.g. AMI
// sendc_ operations.
virtual be_operation *arguments (void);
// Returns a customized arguments list, e.g. AMI sendc_ operations
// only use the in and inout arguments but not the out arguments,
// also the first argument is the reply handler.
virtual be_operation_strategy *copy (void);
// Overrides return a deep copy.
virtual void destroy (void);
// Cleanup.
protected:
be_operation *node_;
// The node we strategize.
Strategy_Kind strategy_type_;
// The type of strategy.
};
// Default (do nothing) strategy for operations.
class be_operation_default_strategy
: public be_operation_strategy
{
public:
be_operation_default_strategy (be_operation *node);
virtual ~be_operation_default_strategy (void);
// Overridden methods.
TAO_CodeGen::CG_STATE next_state (TAO_CodeGen::CG_STATE current_state,
int is_extra_state = 0);
virtual be_operation_strategy *copy (void);
// Returns a deep copy.
};
// Strategy to mark normal reply handler operations
// in order to have them generate the reply stub
// alias client skeleton for AMI.
class be_operation_ami_handler_reply_stub_strategy
: public be_operation_strategy
{
public:
be_operation_ami_handler_reply_stub_strategy (be_operation *node);
virtual ~be_operation_ami_handler_reply_stub_strategy (void);
// Overridden methods.
TAO_CodeGen::CG_STATE next_state (TAO_CodeGen::CG_STATE current_state,
int is_extra_state = 0);
virtual int has_extra_code_generation (TAO_CodeGen::CG_STATE current_state);
// Returns true if we have to genrate extra code.
virtual be_operation_strategy *copy (void);
// Returns a deep copy.
};
// Strategy to mark normal sendc_ operations
// in AMI mode.
class be_operation_ami_sendc_strategy : public be_operation_strategy
{
public:
be_operation_ami_sendc_strategy (be_operation *node,
be_operation *marshaling,
be_operation *arguments);
virtual ~be_operation_ami_sendc_strategy (void);
// Overridden methods.
TAO_CodeGen::CG_STATE next_state (TAO_CodeGen::CG_STATE current_state,
int is_extra_state = 0);
virtual int has_extra_code_generation (TAO_CodeGen::CG_STATE current_state);
// Returns true if we have to genrate extra code.
virtual be_operation *marshaling (void);
// Returns the operation containing special marshaling information,
// this makes sense if not all arguments get marshaled, e.g. AMI
// sendc_ operations
virtual be_operation *arguments (void);
// Returns a customized arguments list, e.g. AMI sendc_ operations
// only use the in and inout arguments but not the out arguments,
// also the first argument is the reply handler.
virtual be_operation_strategy *copy (void);
// Returns a deep copy.
virtual void destroy (void);
// Cleanup.
private:
be_operation *marshaling_;
be_operation *arguments_;
bool owns_operations_;
};
// Strategy for raise operations in the AMI exception
// holder valuetype.
class be_operation_ami_exception_holder_raise_strategy
: public be_operation_strategy
{
public:
be_operation_ami_exception_holder_raise_strategy (be_operation *node);
virtual ~be_operation_ami_exception_holder_raise_strategy ();
// Overridden methods.
virtual TAO_CodeGen::CG_STATE next_state (
TAO_CodeGen::CG_STATE current_state,
int is_extra_state = 0
);
virtual be_operation_strategy *copy (void);
// Returns a deep copy.
};
// AMH strategy.
class be_operation_amh_strategy
: public be_operation_strategy
{
public:
be_operation_amh_strategy (be_operation *node);
virtual ~be_operation_amh_strategy (void);
// Overridden methods.
TAO_CodeGen::CG_STATE next_state (TAO_CodeGen::CG_STATE current_state,
int is_extra_state = 0);
virtual int has_extra_code_generation (TAO_CodeGen::CG_STATE current_state);
virtual be_operation *arguments (void);
virtual be_operation_strategy *copy (void);
// Returns a deep copy.
private:
be_operation *arguments_;
};
#endif // TAO_BE_OPERATION_STRATEGY_H
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