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// -*- C++ -*-
//=============================================================================
/**
* @file Policy_Set.h
*
* A Policy Container that provides O(1) time access for policy that
* support caching (see orbconf.h).
*
* @author Angelo Cosaro (corsaro@cs.wustl.edu)
* @author Frank Hunleth (fhunleth@cs.wustl.edu)
* @author Carlos O'Ryan (coryan@cs.wustl.edu)
*/
//=============================================================================
#ifndef TAO_POLICY_SET_H
#define TAO_POLICY_SET_H
#include /**/ "ace/pre.h"
#include "tao/PolicyC.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
/**
* @class TAO_Policy_Set
*
* @brief The policy manager implementation.
*
* This class is used to implement both the CORBA::PolicyManager
* and the CORBA::PolicyCurrent interfaces.
*/
class TAO_Export TAO_Policy_Set
{
public:
/** Creates a TAO_Policy_Set that has a given scope. The
* scope is used to determinate whether or not a given policy can
* be set for the given Policy Manager Implementation.
*/
TAO_Policy_Set (TAO_Policy_Scope scope);
/// Copy constructor.
TAO_Policy_Set (const TAO_Policy_Set &rhs);
/// Destructor
~TAO_Policy_Set ();
/// Copy the state from @a source, it uses the copy() operator to
/// obtain independent copies of all the policies.
void copy_from (TAO_Policy_Set* source);
/**
* Modify the list of policies to include @a policies.
* If @a set_add is @c CORBA::SET_OVERRIDE then we replace all the
* old policies. If it is @c CORBA::ADD_OVERRIDE we simply add the
* policies in @a policies.
* No attempt is made to validate the policies for consistency.
*/
void set_policy_overrides (const CORBA::PolicyList & policies,
CORBA::SetOverrideType set_add);
/// Get the values (if any) for the policies in @a types, if @a
/// types is an empty list the method returns *all* the current
/// policies.
CORBA::PolicyList * get_policy_overrides (const CORBA::PolicyTypeSeq & types);
/// Obtain a single policy.
CORBA::Policy_ptr get_policy (CORBA::PolicyType policy);
/// Obtain a cached policy for speedy lookups.
/**
* This method just returns a const reference to the policy to avoid
* obtaining a lock to increment the reference count. As such, it
* can only be used for single threaded cases or cases where the
* policies cannot be removed such as at the object and thread level
* scopes. This method is most likely not appropriate for accessing
* policies at the ORB level scope in any situation.
*/
CORBA::Policy_ptr get_cached_const_policy (TAO_Cached_Policy_Type type) const;
/// Obtain a single cached policy.
CORBA::Policy_ptr get_cached_policy (TAO_Cached_Policy_Type type);
/// Utility method to set a single policy.
void set_policy (const CORBA::Policy_ptr policy);
/// Returns the policy at the specified index.
/// @c CORBA::Policy::_nil () is returned if the policy doesn't
/// exist.
CORBA::Policy *get_policy_by_index (CORBA::ULong index) const;
CORBA::ULong num_policies () const;
private:
TAO_Policy_Set & operator= (const TAO_Policy_Set&);
/// Remove and destroy all the policy objects owned by this policy
/// manager.
void cleanup_i ();
/// Utility method to determine if a policy's scope is compatible with ours.
CORBA::Boolean compatible_scope (TAO_Policy_Scope policy_scope) const;
private:
/// Policies set for this Policy_Manager
CORBA::PolicyList policy_list_;
/// List of caches.
CORBA::Policy *cached_policies_[TAO_CACHED_POLICY_MAX_CACHED];
/// Scope associated to the Policy Manager Impl
TAO_Policy_Scope scope_;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
# include "tao/Policy_Set.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_POLICY_SET_H */
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