FGPropertyValue Class Reference

Detailed Description

Represents a property value which can use late binding.

Author

Jon Berndt, Anders Gidenstam

Definition at line 62 of file FGPropertyValue.h.

#include <FGPropertyValue.h>

Inheritance diagram for FGPropertyValue:

Collaboration diagram for FGPropertyValue:

Public Member Functions
	FGPropertyValue (const std::string &propName, std::shared_ptr< FGPropertyManager > propertyManager, Element *el)
	FGPropertyValue (FGPropertyNode *propNode)
virtual std::string	GetFullyQualifiedName (void) const
std::string	GetName (void) const override
virtual std::string	GetNameWithSign (void) const
virtual std::string	GetPrintableName (void) const
double	GetValue (void) const override
bool	IsConstant (void) const override
bool	IsLateBound (void) const
void	SetNode (FGPropertyNode *node)
void	SetValue (double value)
Public Member Functions inherited from FGParameter
double	getDoubleValue (void) const

Protected Member Functions
FGPropertyNode *	GetNode (void) const

Constructor & Destructor Documentation

FGPropertyValue() [1/2]

FGPropertyValue ( FGPropertyNode *  propNode )

inlineexplicit

Definition at line 66 of file FGPropertyValue.h.

    : PropertyManager(nullptr), PropertyNode(propNode), Sign(1.0) {}

FGPropertyValue() [2/2]

FGPropertyValue	(	const std::string &	propName,
		std::shared_ptr< FGPropertyManager >	propertyManager,
		Element *	el
	)

Definition at line 44 of file FGPropertyValue.cpp.

  : PropertyManager(propertyManager), PropertyNode(nullptr), XML_def(el),
    PropertyName(propName), Sign(1.0)
{
  if (PropertyName[0] == '-') {
    PropertyName.erase(0,1);
    Sign = -1.0;
  }
 
  if (PropertyManager->HasNode(PropertyName)) {
    PropertyNode = PropertyManager->GetNode(PropertyName);
 
    assert(PropertyNode);
    XML_def = nullptr; // Now that the property is bound, we no longer need that.
  }
}

Member Function Documentation

GetFullyQualifiedName()

std::string GetFullyQualifiedName ( void  ) const

virtual

Definition at line 125 of file FGPropertyValue.cpp.

{
  if (PropertyNode)
    return PropertyNode->GetFullyQualifiedName();
  else
    return PropertyName;
}

GetName()

std::string GetName ( void  ) const

overridevirtual

Implements FGParameter.

Definition at line 102 of file FGPropertyValue.cpp.

{
  if (PropertyNode)
    return PropertyNode->GetName();
  else
    return PropertyName;
}

GetNameWithSign()

std::string GetNameWithSign ( void  ) const

virtual

Definition at line 112 of file FGPropertyValue.cpp.

{
  string name;
 
  if (Sign < 0.0) name ="-";
 
  name += GetName();
 
  return name;
}

GetNode()

FGPropertyNode * GetNode ( void  ) const

protected

Definition at line 64 of file FGPropertyValue.cpp.

{
  if (PropertyNode) return PropertyNode;
 
  // Manage late binding.
  PropertyNode = PropertyManager->GetNode(PropertyName);
  if (!PropertyNode) {
    if (XML_def)
      cerr << XML_def->ReadFrom()
           << "Property " << PropertyName << " does not exist" << endl;
    throw BaseException("FGPropertyValue::GetValue() The property " +
                        PropertyName + " does not exist.");
  }
 
  XML_def = nullptr; // Now that the property is bound, we no longer need that.
 
  return PropertyNode;
}

GetPrintableName()

std::string GetPrintableName ( void  ) const

virtual

Definition at line 135 of file FGPropertyValue.cpp.

{
  if (PropertyNode)
    return PropertyNode->GetPrintableName();
  else
    return PropertyName;
}

GetValue()

double GetValue ( void  ) const

overridevirtual

Implements FGParameter.

Definition at line 85 of file FGPropertyValue.cpp.

{
  return GetNode()->getDoubleValue()*Sign;
}

IsConstant()

bool IsConstant ( void  ) const

inlineoverridevirtual

Reimplemented from FGParameter.

Definition at line 72 of file FGPropertyValue.h.

                                       {
    return PropertyNode && (!PropertyNode->isTied()
                         && !PropertyNode->getAttribute(SGPropertyNode::WRITE));
  }

IsLateBound()

bool IsLateBound ( void  ) const

inline

Definition at line 78 of file FGPropertyValue.h.

{ return PropertyNode == nullptr; }

SetNode()

void SetNode ( FGPropertyNode *  node )

inline

Definition at line 76 of file FGPropertyValue.h.

{PropertyNode = node;}

SetValue()

void SetValue

(

double

value

)

Definition at line 92 of file FGPropertyValue.cpp.

{
  // SetValue() ignores the Sign flag. So make sure it is never called with a
  // negative sign.
  assert(Sign == 1);
  GetNode()->setDoubleValue(value);
}

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

• FGPropertyValue.h
• FGPropertyValue.cpp