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

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

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

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.

Definition at line 31 of file Field.cpp.

References m_alias.

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.

Definition at line 38 of file Field.cpp.

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

Constructor.

Parameters

propertyName	The property name.
alias	The property alias.

Definition at line 44 of file Field.cpp.

References m_alias, and m_field.

te::da::Field::Field

(

const Field &

rhs

)

Copy constructor.

Definition at line 52 of file Field.cpp.

References m_alias, and m_field.

te::da::Field::~Field

(

)

Destructor.

Definition at line 60 of file Field.cpp.

Member Function Documentation

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

(

)

const

It returns the alias for the outout expression.

Returns

The alias for the outout expression.

Definition at line 90 of file Field.cpp.

Referenced by te::serialize::xml::Save().

te::da::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.

Definition at line 80 of file Field.cpp.

Referenced by te::graph::QueryIterator::getFirstEdge(), te::graph::BoxIterator::getFirstEdge(), te::graph::SequenceIterator::getFirstVertex(), te::graph::BoxIterator::getFirstVertex(), te::map::QueryLayer::getSchema(), te::graph::SequenceLoaderStrategy::loadDataByEdgeId(), te::graph::BoxLoaderStrategy::loadDataByEdgeId(), te::graph::SequenceLoaderStrategy::loadDataByVertexId(), te::graph::BoxLoaderStrategy::loadDataByVertexId(), te::serialize::xml::Save(), te::da::ObjectIdSet::setExpressionByIntersection(), and te::qt::widgets::FieldsWizardPage::setFields().

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

(

const Field &

rhs

)

Assignment operator.

Definition at line 64 of file Field.cpp.

References m_alias, and m_field.

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.

Definition at line 85 of file Field.cpp.

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.

Definition at line 75 of file Field.cpp.

Member Data Documentation

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

private

An alias for the output name.

Definition at line 124 of file Field.h.

Referenced by Field(), and operator=().

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

private

A valid expression.

Definition at line 123 of file Field.h.

Referenced by Field(), and operator=().

---

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

• C:/TL5_2015_release/terralib5/src/terralib/dataaccess/query/Field.h
• C:/TL5_2015_release/terralib5/src/terralib/dataaccess/query/Field.cpp