te::se::Function Class Reference

Symbology Encoding functions. More...

#include <Function.h>

Inheritance diagram for te::se::Function:

Public Types
typedef void	ReturnType
typedef Visitor	VisitorType

Public Member Functions
virtual ReturnType	accept (VisitorType &guest) const =0
	It call the visit method from the guest object. More...
virtual Expression *	clone () const =0
	It returns a clone of this object. More...
const std::string &	getFallbackValue () const
void	setFallbackValue (const std::string &v)
Initializer Methods
Methods related to instantiation and destruction.
	Function ()
	It initializes a new Function. More...
virtual	~Function ()
	Virtual destructor. More...

Protected Attributes
std::string	m_fallbackValue
	The value of the fallbackValue attribute is used as a default value, if the SE implementation does not support the function. If the implementation supports the function, then the result value is determined by executing the function. (Mandatory) More...

Detailed Description

Symbology Encoding functions.

Symbology Encoding extends the concept of ogc::fe::Expression inherited from Filter Encoding to adequately support the needs of symbolization in transforming and editing data. It does so by introducing a couple of functions (ogc::se::Function) which are substitutable for ogc::fe::expression.
There are two general groups of functions for usage in SE. The first group is used to transform raw values into "symbolizable" quantities. This especially comprises the processes of categorization, recoding, and interpolation. This group of functions is especially useful in all places using SvgParameters, making them dynamically related to data values. The second group defines means for formatting data items like numbers, strings, and dates. These functions are especially helpful to set up the Label element of TextSymbolizers.

See also

FormatNumber, FormatDate, Substring, Concatenate, ChangeCase, Trim, StringPosition, StringLength, Categorize, Interpolate, Recode

Definition at line 65 of file Function.h.

Member Typedef Documentation

typedef void te::common::BaseVisitable< Visitor , void >::ReturnType

inherited

Definition at line 58 of file BaseVisitable.h.

typedef Visitor te::common::BaseVisitable< Visitor , void >::VisitorType

inherited

Definition at line 57 of file BaseVisitable.h.

Constructor & Destructor Documentation

te::se::Function::Function

(

)

It initializes a new Function.

virtual te::se::Function::~Function ( )

virtual

Virtual destructor.

Member Function Documentation

virtual ReturnType te::common::BaseVisitable< Visitor , void >::accept ( VisitorType &  guest ) const

pure virtualinherited

It call the visit method from the guest object.

Parameters

guest

The guest or visitor.

Returns

Any valid value define by the template type R.

virtual Expression* te::fe::Expression::clone ( ) const

pure virtualinherited

It returns a clone of this object.

Returns

A clone of this object.

Implemented in te::fe::BinaryOperator, te::fe::Function, te::se::Interpolate, te::se::Categorize, te::fe::Literal, te::fe::PropertyName, te::se::Recode, te::se::InterpolationPoint, and te::se::MapItem.

const std::string& te::se::Function::getFallbackValue

(

)

const

void te::se::Function::setFallbackValue

(

const std::string &

v

)

Member Data Documentation

std::string te::se::Function::m_fallbackValue

protected

The value of the fallbackValue attribute is used as a default value, if the SE implementation does not support the function. If the implementation supports the function, then the result value is determined by executing the function. (Mandatory)

Definition at line 88 of file Function.h.

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

• /home/castejon/castejon_files/develop/terralib5/git_master/src/terralib/se/Function.h