te::da::Field Class Reference

The Field class can be used to model an expression that takes part of the output items of a SELECT. More...

#include <Field.h>

Public Member Functions
	Field (const Expression &e, const std::string &alias=std::string(""))
	Constructor.
	Field (const Field &rhs)
	Copy constructor.
	Field (const std::string &propertyName, const std::string &alias=std::string(""))
	Constructor.
	Field (Expression *e, std::string *alias=0)
	Constructor.
std::string *	getAlias () const
	It returns the alias for the outout expression.
Expression *	getExpression () const
	It returns the expression set for an output select query.
Field &	operator= (const Field &rhs)
void	setAlias (std::string *alias)
	As you know, sometimes is better to give an alias to an output expression.
void	setExpression (Expression *e)
	It sets the an expression that can be used in a Select query.
	~Field ()
	Destructor.

Private Attributes
std::unique_ptr< std::string >	m_alias
	An alias for the output name.
std::unique_ptr< Expression >	m_field
	A valid expression.

Detailed Description

The Field class can be used to model an expression that takes part of the output items of a SELECT.

See also

Fields

Definition at line 50 of file Field.h.

Constructor & Destructor Documentation

Field() [1/4]

te::da::Field::Field	(	const Expression &	e,
		const std::string &	alias = std::string("")
	)

Constructor.

Parameters

e	The output expression to be used in a Select clause.
alias	An alias to the output expression.

Field() [2/4]

te::da::Field::Field	(	Expression *	e,
		std::string *	alias = 0
	)

Constructor.

Parameters

e	The output expression to be used in a Select clause.
alias	An alias to the output expression.

Note

The Field will take the ownership of Expression and alias.

Field() [3/4]

te::da::Field::Field	(	const std::string &	propertyName,
		const std::string &	alias = std::string("")
	)

Constructor.

Parameters

propertyName	The property name.
alias	The property alias.

Field() [4/4]

te::da::Field::Field

(

const Field &

rhs

)

Copy constructor.

~Field()

te::da::Field::~Field

(

)

Destructor.

Member Function Documentation

getAlias()

std::string * te::da::Field::getAlias

(

)

const

It returns the alias for the outout expression.

Returns

The alias for the outout expression.

getExpression()

Expression * te::da::Field::getExpression

(

)

const

It returns the expression set for an output select query.

Returns

The expression set for an output select query.

operator=()

Field & te::da::Field::operator=

(

const Field &

rhs

)

Assignment operator.

setAlias()

void te::da::Field::setAlias

(

std::string *

alias

)

As you know, sometimes is better to give an alias to an output expression.

Parameters

alias

An aliast fo the output expression.

Note

The Field object will take the ownership of the alias.

setExpression()

void te::da::Field::setExpression

(

Expression *

e

)

It sets the an expression that can be used in a Select query.

Parameters

e	An expression that can be used in a Select query.

Note

The Field will take the ownership of the given expression.

Member Data Documentation

m_alias

std::unique_ptr<std::string> te::da::Field::m_alias

private

An alias for the output name.

Definition at line 124 of file Field.h.

m_field

std::unique_ptr<Expression> te::da::Field::m_field

private

A valid expression.

Definition at line 123 of file Field.h.

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

• /home/castejon/castejon_files/develop/terralib5/git_release/src/terralib/dataaccess/query/Field.h