com.querydsl.core.types

Class QBean<T>

java.lang.Object

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

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

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

Type Parameters:

T - bean type

All Implemented Interfaces:

Expression<T>, FactoryExpression<T>, Serializable

public class QBean<T>
extends FactoryExpressionBase<T>

QBean is a JavaBean populating projection type

Example

 
 QEmployee employee = QEmployee.employee;
 List<EmployeeInfo> result = query.from(employee)
      .where(employee.valid.eq(true))
      .select(Projections.bean(EmployeeInfo.class, employee.firstName, employee.lastName))
      .fetch();
 
 

Author:

tiwe

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	QBean(Class<? extends T> type, boolean fieldAccess, Expression<?>... args) Create a new QBean instance
protected	QBean(Class<? extends T> type, boolean fieldAccess, Map<String,? extends Expression<?>> bindings) Create a new QBean instance
protected	QBean(Class<? extends T> type, Expression<?>... args) Create a new QBean instance
protected	QBean(Class<? extends T> type, Map<String,? extends Expression<?>> bindings) Create a new QBean 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
Expression<T>	as(Path<T> alias) Create an alias for the expression
Expression<T>	as(String alias) Create an alias for the expression
protected <T> T	create(Class<T> type)
boolean	equals(Object obj)
List<Expression<?>>	getArgs() Get the invocation arguments
T	newInstance(Object... a) Create a projection with the given arguments
protected void	propertyNotFound(Expression<?> expr, String property)
protected void	typeMismatch(Class<?> type, Expression<?> expr)

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

QBean

protected QBean(Class<? extends T> type,
                Map<String,? extends Expression<?>> bindings)

Create a new QBean instance

Parameters:

type - type of bean

bindings - bindings

QBean

protected QBean(Class<? extends T> type,
                Expression<?>... args)

Create a new QBean instance

Parameters:

type - type of bean

args - properties to be populated

QBean

protected QBean(Class<? extends T> type,
                boolean fieldAccess,
                Expression<?>... args)

Create a new QBean instance

Parameters:

type - type of bean

fieldAccess - true, for field access and false, for property access

args - fields or properties to be populated

QBean

protected QBean(Class<? extends T> type,
                boolean fieldAccess,
                Map<String,? extends Expression<?>> bindings)

Create a new QBean instance

Parameters:

type - type of bean

fieldAccess - true, for field access and false, for property access

bindings - bindings

Method Detail

propertyNotFound

protected void propertyNotFound(Expression<?> expr,
                                String property)

typeMismatch

protected void typeMismatch(Class<?> type,
                            Expression<?> expr)

newInstance

public T newInstance(Object... a)

Description copied from interface: FactoryExpression

Create a projection with the given arguments

Parameters:

a - row arguments

Returns:

constructed value

create

protected <T> T create(Class<T> type)
                throws IllegalAccessException,
                       InstantiationException

Throws:

IllegalAccessException

InstantiationException

as

public Expression<T> as(Path<T> alias)

Create an alias for the expression

Returns:

this as alias

as

public Expression<T> as(String alias)

Create an alias for the expression

Returns:

this as alias

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<T>

getArgs

public List<Expression<?>> getArgs()

Description copied from interface: FactoryExpression

Get the invocation arguments

Returns:

argument expressions