com.espertech.esper.client.soda

Class OrderByClause

java.lang.Object

com.espertech.esper.client.soda.OrderByClause

All Implemented Interfaces:

Serializable

public class OrderByClause
extends Object
implements Serializable

An order-by clause consists of expressions and flags indicating if ascending or descending.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
OrderByClause() Ctor.
OrderByClause(Expression... expressions) Ctor.
OrderByClause(String... properties) Ctor.

Method Summary

Modifier and Type	Method and Description
OrderByClause	add(Expression expression, boolean isDescending) Adds an expression and flag.
OrderByClause	add(String property, boolean isDescending) Adds a property and flag.
static OrderByClause	create() Create an empty order-by clause.
static OrderByClause	create(Expression... expressions) Create an order-by clause.
static OrderByClause	create(String... properties) Create an order-by clause.
List<OrderByElement>	getOrderByExpressions() Returns a list of expressions and flags to order by.
void	setOrderByExpressions(List<OrderByElement> orderByExpressions) Sets a list of expressions and flags to order by.
void	toEPL(StringWriter writer) Renders the clause in textual representation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OrderByClause

public OrderByClause()

Ctor.

OrderByClause

public OrderByClause(String... properties)

Ctor.

Parameters:

properties - property names

OrderByClause

public OrderByClause(Expression... expressions)

Ctor.

Parameters:

expressions - is the expressions

Method Detail

create

public static OrderByClause create()

Create an empty order-by clause.

Returns:

clause

create

public static OrderByClause create(String... properties)

Create an order-by clause.

Parameters:

properties - is the property names to order by

Returns:

clause

create

public static OrderByClause create(Expression... expressions)

Create an order-by clause.

Parameters:

expressions - is the expressios returning values to order by

Returns:

clause

add

public OrderByClause add(String property,
                         boolean isDescending)

Adds a property and flag.

Parameters:

property - is the name of the property to add

isDescending - true for descending, false for ascending sort

Returns:

clause

add

public OrderByClause add(Expression expression,
                         boolean isDescending)

Adds an expression and flag.

Parameters:

expression - returns values to order by

isDescending - true for descending, false for ascending sort

Returns:

clause

getOrderByExpressions

public List<OrderByElement> getOrderByExpressions()

Returns a list of expressions and flags to order by.

Returns:

order-by elements

setOrderByExpressions

public void setOrderByExpressions(List<OrderByElement> orderByExpressions)

Sets a list of expressions and flags to order by.

Parameters:

orderByExpressions - is the expressions to order by

toEPL

public void toEPL(StringWriter writer)

Renders the clause in textual representation.

Parameters:

writer - to output to