TAO_Property_Evaluator_By_Name Class Reference

This class extends the TAO_Property_Evaluator to allow lookups based on the property name of interest. Since the property information is contained within an integer indexed array, lookups may occur in O(n) time, where n is the length of the array. To make lookups by name more efficient, TAO_Property_Evaluator_By_Name creates a mapping of property names to integer indicies, upon which lookups are guaranteed to be O(lg n). More...

#include <Trader_Utils.h>

Inheritance diagram for TAO_Property_Evaluator_By_Name:

[legend]Collaboration diagram for TAO_Property_Evaluator_By_Name:

[legend]List of all members.

Public Member Functions
	TAO_Property_Evaluator_By_Name (const CosTrading::PropertySeq &properties, CORBA::Boolean supports_dp=1)
	TAO_Property_Evaluator_By_Name (CosTrading::Offer &offer, CORBA::Boolean supports_dp=1)
int	is_dynamic_property (const char *property_name)
CORBA::Any *	property_value (const char *property_name)
CORBA::TypeCode_ptr	property_type (const char *property_name)
const CosTrading::Property *	get_property (const char *property_name)
Private Member Functions
	TAO_Property_Evaluator_By_Name (const TAO_Property_Evaluator_By_Name &)
TAO_Property_Evaluator_By_Name &	operator= (const TAO_Property_Evaluator_By_Name &)
Private Attributes
TAO_Lookup_Table	table_

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Detailed Description

This class extends the TAO_Property_Evaluator to allow lookups based on the property name of interest. Since the property information is contained within an integer indexed array, lookups may occur in O(n) time, where n is the length of the array. To make lookups by name more efficient, TAO_Property_Evaluator_By_Name creates a mapping of property names to integer indicies, upon which lookups are guaranteed to be O(lg n).

Definition at line 125 of file Trader_Utils.h.

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Constructor & Destructor Documentation

TAO_Property_Evaluator_By_Name::TAO_Property_Evaluator_By_Name	(	const CosTrading::PropertySeq &	properties,
		CORBA::Boolean	supports_dp = 1
	)

Definition at line 333 of file Trader_Utils.cpp.

References TAO_Trader_Base::is_valid_property_name(), and TAO_Property_Evaluator::props_.

    : TAO_Property_Evaluator (properties, supports_dp)
{
  int length = this->props_.length();

  for (int i = 0; i < length; i++)
    {
      const CosTrading::Property& prop = this->props_[i];

      if (! TAO_Trader_Base::is_valid_property_name (prop.name))
        throw CosTrading::IllegalPropertyName (prop.name);

      CORBA::String_var prop_name = prop.name.in ();
      if (this->table_.bind (prop_name, i))
        throw CosTrading::DuplicatePropertyName (prop.name);
    }
}

TAO_Property_Evaluator_By_Name::TAO_Property_Evaluator_By_Name	(	CosTrading::Offer &	offer,
		CORBA::Boolean	supports_dp = 1
	)

Construct an instance of TAO_Property_Evaluator that operates on an <offer> where the support for dynamic properties is dictated by <supports_dynamic_properties>.

Definition at line 354 of file Trader_Utils.cpp.

References TAO_Property_Evaluator::props_.

  : TAO_Property_Evaluator(offer, supports_dp)
{
  int length = this->props_.length();

  for (int i = 0; i < length; i++)
    {
      CORBA::String_var prop_name = (const char*) this->props_[i].name;
      this->table_.bind (prop_name, i);
    }
}

TAO_Property_Evaluator_By_Name::TAO_Property_Evaluator_By_Name

(

const TAO_Property_Evaluator_By_Name &

)

[private]

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Member Function Documentation

const CosTrading::Property * TAO_Property_Evaluator_By_Name::get_property

(

const char *

property_name

)

Definition at line 417 of file Trader_Utils.cpp.

References TAO_Property_Evaluator::props_.

Referenced by TAO_Register< TRADER_LOCK_TYPE, MAP_LOCK_TYPE >::validate_properties().

{
  int index = 0;
  CosTrading::Property* property = 0;
  CORBA::String_var prop_name (property_name);

  if (this->table_.find (prop_name, index) == 0)
    property = (CosTrading::Property *) &this->props_[index];

  return property;
}

int TAO_Property_Evaluator_By_Name::is_dynamic_property

(

const char *

property_name

)

Returns 1 if the property whose name is <property_name> is defined and dynamic. If the property is undefined, this method will throw a Property_Undefined exception with impunity.

Definition at line 369 of file Trader_Utils.cpp.

Referenced by TAO_Register< TRADER_LOCK_TYPE, MAP_LOCK_TYPE >::validate_properties().

{
  int predicate = 0;
  int index = 0;
  CORBA::String_var prop_name (property_name);

  // If the property name is in the map, delegate evaluation to our
  // superclass. Otherwise, throw an exception.
  if (this->table_.find (prop_name, index) == 0)
    predicate = this->TAO_Property_Evaluator::is_dynamic_property(index);

  return predicate;
}

TAO_Property_Evaluator_By_Name& TAO_Property_Evaluator_By_Name::operator=

(

const TAO_Property_Evaluator_By_Name &

)

[private]

CORBA::TypeCode_ptr TAO_Property_Evaluator_By_Name::property_type

(

const char *

property_name

)

This method is identical to its counterpart in TAO_Property_Evaluator, exception property_type first discovers the index through a string matching lookup.

Definition at line 402 of file Trader_Utils.cpp.

Referenced by TAO_Register< TRADER_LOCK_TYPE, MAP_LOCK_TYPE >::validate_properties().

{
  int index = 0;
  CORBA::String_var prop_name (property_name);
  CORBA::TypeCode_ptr prop_type = CORBA::TypeCode::_nil();

  // If the property name is in the map, delegate evaluation to our
  // superclass. Otherwise, throw an exception.
  if (this->table_.find (prop_name, index) == 0)
    prop_type = this->TAO_Property_Evaluator::property_type (index);

  return prop_type;
}

CORBA::Any * TAO_Property_Evaluator_By_Name::property_value

(

const char *

property_name

)

This method is identical to its counterpart in TAO_Property_Evaluator, except property_value first discovers the index through a string matching lookup.

Definition at line 384 of file Trader_Utils.cpp.

{
  int index = 0;
  CORBA::Any* prop_value = 0;
  CORBA::String_var prop_name (property_name);

  // If the property name is in the map, delegate evaluation to our
  // superclass. Otherwise, throw an exception.
  if (this->table_.find (prop_name, index) == 0)
    {
      prop_value =
        this->TAO_Property_Evaluator::property_value (index);
    }

  return prop_value;
}

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Member Data Documentation

TAO_Lookup_Table TAO_Property_Evaluator_By_Name::table_ [private]

The instance of the above mapping for the offer provided in the constructor.

Definition at line 171 of file Trader_Utils.h.

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

• Trader_Utils.h
• Trader_Utils.cpp

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