com.querydsl.core.types

Class QTuple

java.lang.Object

com.querydsl.core.types.ExpressionBase<T>

com.querydsl.core.types.FactoryExpressionBase<Tuple>

com.querydsl.core.types.QTuple

All Implemented Interfaces:

Expression<Tuple>, FactoryExpression<Tuple>, Serializable

@Immutable
public class QTuple
extends FactoryExpressionBase<Tuple>

QTuple represents a projection of type Tuple

Usage example:

 
 List<Tuple> result = query.from(employee).select(Projections.tuple(employee.firstName, employee.lastName)).fetch();
 for (Tuple row : result) {
     System.out.println("firstName " + row.get(employee.firstName));
     System.out.println("lastName " + row.get(employee.lastName));
 }
 

Since Tuple projection is the default for multi column projections, the above is equivalent to this code

 
 List<Tuple> result = query.from(employee).select(employee.firstName, employee.lastName).fetch();
 for (Tuple row : result) {
     System.out.println("firstName " + row.get(employee.firstName));
     System.out.println("lastName " + row.get(employee.lastName));
 }
 

Author:

tiwe

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	QTuple(Expression<?>... args) Create a new QTuple instance
protected	QTuple(Expression<?>[]... args) Create a new QTuple instance
protected	QTuple(com.google.common.collect.ImmutableList<Expression<?>> args) Create a new QTuple instance

Method Summary

Modifier and Type	Method and Description
<R,C> R	accept(Visitor<R,C> v, C context) Accept the visitor with the given context
boolean	equals(Object obj)
List<Expression<?>>	getArgs() Get the invocation arguments
Tuple	newInstance(Object... a) Create a projection with the given arguments

Methods inherited from class com.querydsl.core.types.FactoryExpressionBase

skipNulls

Methods inherited from class com.querydsl.core.types.ExpressionBase

getType, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.querydsl.core.types.Expression

getType

Constructor Detail

QTuple

protected QTuple(Expression<?>... args)

Create a new QTuple instance

Parameters:

args -

QTuple

protected QTuple(com.google.common.collect.ImmutableList<Expression<?>> args)

Create a new QTuple instance

Parameters:

args -

QTuple

protected QTuple(Expression<?>[]... args)

Create a new QTuple instance

Parameters:

args -

Method Detail

newInstance

public Tuple newInstance(Object... a)

Description copied from interface: FactoryExpression

Create a projection with the given arguments

Parameters:

a - row arguments

Returns:

constructed value

accept

public <R,C> R accept(Visitor<R,C> v,
                      C context)

Description copied from interface: Expression

Accept the visitor with the given context

Type Parameters:

R - return type

C - context type

Parameters:

v - visitor

context - context of visit

Returns:

result of visit

equals

public boolean equals(Object obj)

Overrides:

equals in class FactoryExpressionBase<Tuple>

getArgs

public List<Expression<?>> getArgs()

Description copied from interface: FactoryExpression

Get the invocation arguments

Returns:

argument expressions