xtd::diagnostics::switch_base Class Reference

Inheritance diagram for xtd::diagnostics::switch_base:

Definition

Provides an abstract base class to create new debugging and tracing switches.

class core_export_ switch_base : public xtd::object

Inheritance

xtd::object → xtd::diagnostics::switch_base

Header

#include <xtd/diagnostics/switch_base>

Namespace

xtd::diagnostics

Library

xtd.core

Remarks

A switch provides an efficient mechanism for controlling tracing and debugging output at run time using external settings. The switch_base class implements default behavior for switches, allowing you to change the switch level at run time.

This class is the base class for the boolean_switch, source_switch and the trace_switch classes. These switches meet most debugging and tracing needs.

Notes to implementers

If you need trace levels, or mechanisms for setting switch levels different from those provided by boolean_switch, source_switch and trace_switch, you can inherit from switch_base. When inheriting from this class, you must implement the switch_setting method.

Public Properties
const std::map< xtd::string, xtd::string > &	attributes () const noexcept
	Gets the custom switch attributes.
std::map< xtd::string, xtd::string > &	attributes () noexcept
	Gets the custom switch attributes.
void	attributes (const std::map< xtd::string, xtd::string > &attributes) noexcept
	Sets the custom switch attributes.
const xtd::string &	description () const noexcept
	Gets a description of the switch.
const xtd::string &	display_name () const noexcept
	Gets a name used to identify the switch.

Public Methods
bool	equals (const switch_base &value) const noexcept override
virtual bool	equals (const object &obj) const noexcept
	Determines whether the specified object is equal to the current object.
template<typename object_a_t , typename object_b_t >
static bool	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are considered equal.

Protected constructors
	switch_base (const xtd::string &display_name, const xtd::string &description)
	Initializes a new instance of the switch_base class.
	switch_base (const xtd::string &display_name, const xtd::string &description, const xtd::string &default_switch_value)
	Initializes a new instance of the switch_base class.

Protected Properties
int32	switch_setting () const noexcept
	Gets the current setting for this switch.
void	switch_setting (int32 switch_setting)
	Sets the current setting for this switch.
const xtd::string &	value () const noexcept
	Gets the value of the switch.
void	value (const xtd::string &value)
	Sets the value of the switch.

Protected Methods
virtual std::vector< xtd::string >	get_supported_attributes () const noexcept
	Gets the custom attributes supported by the switch.
virtual void	on_switch_setting_changed ()
	Invoked when the switch_setting property is changed.
virtual void	on_value_changed ()
	Invoked when the value property is changed.

Additional Inherited Members
Public Member Functions inherited from xtd::object
	object ()=default
	Create a new instance of the ultimate base class object.
virtual size_t	get_hash_code () const noexcept
	Serves as a hash function for a particular type.
virtual type_object	get_type () const noexcept
	Gets the type of the current instance.
template<typename object_t >
xtd::uptr< object_t >	memberwise_clone () const
	Creates a shallow copy of the current object.
virtual xtd::string	to_string () const noexcept
	Returns a xtd::string that represents the current object.
Public Member Functions inherited from xtd::iequatable< switch_base >
virtual bool	equals (const switch_base &) const noexcept=0
	Indicates whether the current object is equal to another object of the same type.
Static Public Member Functions inherited from xtd::object
template<typename object_a_t , typename object_b_t >
static bool	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are considered equal.
template<typename object_a_t , typename object_b_t >
static bool	reference_equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are the same instance.

Constructor & Destructor Documentation

switch_base() [1/2]

xtd::diagnostics::switch_base::switch_base ( const xtd::string &  display_name, const xtd::string &  description  )

protected

Initializes a new instance of the switch_base class.

Parameters

display_name	The name of the switch.
description	The description for the switch.

Remarks

When you create a new switch_base object, the value of the display_name parameter is used to find initial switch settings. The default value is an empty string ("").

Notes to inheritors

To set the value of the switch, set the switch_setting property in the constructor.

switch_base() [2/2]

xtd::diagnostics::switch_base::switch_base ( const xtd::string &  display_name, const xtd::string &  description, const xtd::string &  default_switch_value  )

protected

Initializes a new instance of the switch_base class.

Parameters

display_name	The name of the switch.
description	The description for the switch.
default_switch_value	The default value for the switch.

Remarks

The display_name parameter is used to set the value of the display_name property, and the description parameter is use to set the value of the description property. The default_switch_value parameter is the value for the switch if the value property is not set by code.

Member Function Documentation

attributes() [1/3]

const std::map< xtd::string, xtd::string > & xtd::diagnostics::switch_base::attributes ( ) const

noexcept

Gets the custom switch attributes.

Returns

nA StringDictionary containing the case-insensitive custom attributes for the trace switch.

attributes() [2/3]

std::map< xtd::string, xtd::string > & xtd::diagnostics::switch_base::attributes ( )

noexcept

Gets the custom switch attributes.

Returns

A StringDictionary containing the case-insensitive custom attributes for the trace switch.

attributes() [3/3]

void xtd::diagnostics::switch_base::attributes ( const std::map< xtd::string, xtd::string > &  attributes )

noexcept

Sets the custom switch attributes.

Parameters

attributes

A StringDictionary containing the case-insensitive custom attributes for the trace switch.

description()

const xtd::string & xtd::diagnostics::switch_base::description ( ) const

noexcept

Gets a description of the switch.

Returns

The description of the switch. The default value is an empty string ("").

Remarks

This property should indicate the function of the switch; for example, "Enables tracing for a directory watcher component." The value is set by the descriptor parameter in the switch_base constructor.

display_name()

const xtd::string & xtd::diagnostics::switch_base::display_name ( ) const

noexcept

Gets a name used to identify the switch.

Returns

The name used to identify the switch. The default value is an empty string ("").

Remarks

When you create a new switch_base object, the display_name finds initial switch settings. For more information, see the switch_base constructor.

switch_setting() [1/2]

int32 xtd::diagnostics::switch_base::switch_setting ( ) const

protectednoexcept

Gets the current setting for this switch.

Returns

The current setting for this switch. The default is zero.

switch_setting() [2/2]

void xtd::diagnostics::switch_base::switch_setting ( int32  switch_setting )

protected

Sets the current setting for this switch.

Parameters

switch_setting

The current setting for this switch. The default is zero.

value() [1/2]

const xtd::string & xtd::diagnostics::switch_base::value ( ) const

protectednoexcept

Gets the value of the switch.

Returns

A string representing the value of the switch.

Remarks

The on_value_changed method is called when the value of the value property is changed. The on_value_changed method parses the value of this property and converts it to an integer value, which is then used to set the switch_setting property.

Notes to inheritors

You should override the on_value_changed() method and provide a conversion operation that sets the appropriate switch_setting value for your switch.

value() [2/2]

void xtd::diagnostics::switch_base::value ( const xtd::string &  value )

protected

Sets the value of the switch.

Parameters

value

A string representing the value of the switch.

Remarks

The on_value_changed method is called when the value of the value property is changed. The on_value_changed method parses the value of this property and converts it to an integer value, which is then used to set the switch_setting property.

Notes to inheritors

You should override the on_value_changed() method and provide a conversion operation that sets the appropriate switch_setting value for your switch.

get_supported_attributes()

virtual std::vector< xtd::string > xtd::diagnostics::switch_base::get_supported_attributes ( ) const

protectedvirtualnoexcept

Gets the custom attributes supported by the switch.

Returns

A string array that contains the names of the custom attributes supported by the switch, or null if there no custom attributes are supported.

Remarks

The default implementation for the get_supported_attributes method returns {} (empty array). If a switch is added in a configuration file and custom attributes are specified that are not included in the string array returned by get_supported_attributes, a configuration_exception is thrown when the switch is loaded.

Notes to Inheritors

When inheriting from the switch_base class or a derived class, you can override the get_supported_attributes() method to provide custom attributes for your class.

on_switch_setting_changed()

virtual void xtd::diagnostics::switch_base::on_switch_setting_changed ( )

protectedvirtual

Invoked when the switch_setting property is changed.

Reimplemented in xtd::diagnostics::trace_switch.

on_value_changed()

virtual void xtd::diagnostics::switch_base::on_value_changed ( )

protectedvirtual

Invoked when the value property is changed.

Remarks

The default implementation parses the new value of the value property to an integer value which it uses to set the switch_setting property.

Not to Inheritors

You should override this method and use a conversion that sets the appropriate switch_setting value for your switch.

Reimplemented in xtd::diagnostics::boolean_switch, xtd::diagnostics::source_switch, and xtd::diagnostics::trace_switch.

equals() [1/2]

virtual bool xtd::object::equals ( const object &  obj ) const

virtualnoexcept

Determines whether the specified object is equal to the current object.

Parameters

obj	The object to compare with the current object.

Returns

true if the specified object is equal to the current object. otherwise, false.

Examples

The following code example compares the current instance with another object.

#include <xtd/console>
 
using namespace xtd;
 
auto main() -> int {
  auto object1 = new_ptr<object>();
  auto object2 = new_ptr<object>();
  
  auto object3 = object2;
  console::write_line(object1->equals(*object3));
  console::write_line(*object1 == *object3);
  object3 = object1;
  console::write_line(object1->equals(*object3));
  console::write_line(*object1 == *object3);
}
 
// This code produces the following output :
//
// false
// false
// true
// true

Reimplemented from xtd::object.

equals() [2/2]

template<typename object_a_t , typename object_b_t >

static bool xtd::object::equals ( const object_a_t &  object_a, const object_b_t &  object_b  )

inlinestaticnoexcept

Determines whether the specified object instances are considered equal.

Parameters

object_a	The first object to compare.
object_b	The second object to compare.

Returns

true if object_a is the same instance as object_b or if both are null references or if object_a(object_b) returns true. otherwise, false.

Examples

The following code example compares different objects.

#include <xtd/console>
 
using namespace xtd;
 
auto main() -> int {
  string s1 = "Tom";
  string s2 = "Carol";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "Tom";
  s2 = "Tom";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "";
  s2 = "Tom";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "Carol";
  s2 = "";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "";
  s2 = "";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
}
 
// This code produces the following output :
//
// object::equals("Tom", "Carol") => false
// object::equals("Tom", "Tom") => true
// object::equals("", "Tom") => false
// object::equals("Carol", "") => false
// object::equals("", "") => true

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The documentation for this class was generated from the following file:

• xtd.core/include/xtd/diagnostics/switch_base.h