Package com.querydsl.core.alias

Class Alias

java.lang.Object

com.querydsl.core.alias.Alias

public final class Alias
extends Object

Alias provides alias factory methods

Example:

 Employee e = alias(Employee.class, "e");
 for (String name : query.from($(e),employees)
     .where($(e.getDepartment().getId()).eq(1001))
     .list($(e.getName()))) {
     System.out.println(name);
 }

using the following static imports

 import static com.mysema.query.alias.Alias.$;
 import static com.mysema.query.alias.Alias.alias;
 

Author:

tiwe

Method Summary

Modifier and Type	Method	Description
static <D extends Expression<?>> D	$()	Convert the given alias to an expression
static <D extends Comparable<?>> ComparablePath<D>	$(D arg)	Convert the given alias to an expression
static <D> ArrayPath<D[],D>	$(D[] arg)	Convert the given alias to an expression
static BooleanPath	$(Boolean arg)	Convert the given alias to an expression
static NumberPath<Byte>	$(Byte arg)	Convert the given alias to an expression
static NumberPath<Double>	$(Double arg)	Convert the given alias to an expression
static NumberPath<Float>	$(Float arg)	Convert the given alias to an expression
static NumberPath<Integer>	$(Integer arg)	Convert the given alias to an expression
static NumberPath<Long>	$(Long arg)	Convert the given alias to an expression
static NumberPath<Short>	$(Short arg)	Convert the given alias to an expression
static StringPath	$(String arg)	Convert the given alias to an expression
static NumberPath<BigDecimal>	$(BigDecimal arg)	Convert the given alias to an expression
static NumberPath<BigInteger>	$(BigInteger arg)	Convert the given alias to an expression
static DatePath<Date>	$(Date arg)	Convert the given alias to an expression
static TimePath<Time>	$(Time arg)	Convert the given alias to an expression
static DateTimePath<Timestamp>	$(Timestamp arg)	Convert the given alias to an expression
static <D> CollectionPath<D,SimpleExpression<D>>	$(Collection<D> arg)	Convert the given alias to an expression
static DateTimePath<Date>	$(Date arg)	Convert the given alias to an expression
static <D> ListPath<D,SimpleExpression<D>>	$(List<D> arg)	Convert the given alias to an expression
static <K, V> MapPath<K,V,SimpleExpression<V>>	$(Map<K,V> arg)	Convert the given alias to an expression
static <D> SetPath<D,SimpleExpression<D>>	$(Set<D> arg)	Convert the given alias to an expression
static <T extends Enum<T>> EnumPath<T>	$(T arg)	Convert the given alias to an expression
static <A> A	alias(Class<A> cl)	Create a new alias proxy of the given type
static <A> A	alias(Class<A> cl, Expression<? extends A> expr)	Create a new alias proxy of the given type for the given expression
static <A> A	alias(Class<A> cl, String var)	Create a new alias proxy of the given type for the given variable
static <D> Expression<D>	getAny(D arg)	Convert the given alias to an expression
static void	resetAlias()	Reset the alias
static <D> SimplePath<D>	var()	Return the default variable
static <D extends Comparable<?>> ComparablePath<D>	var(D arg)	Create a new variable path
static StringPath	var(String arg)	Create a new variable path

Methods inherited from class java.lang.Object

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

Method Details

$

public static <D extends Expression<?>> D $()

Convert the given alias to an expression

Type Parameters:

D -

Returns:

expression

$

public static <D> ArrayPath<D[],D> $(D[] arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<BigDecimal> $(BigDecimal arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<BigInteger> $(BigInteger arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static BooleanPath $(Boolean arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<Byte> $(Byte arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static <T extends Enum<T>> EnumPath<T> $(T arg)

Convert the given alias to an expression

Type Parameters:

T -

Parameters:

arg - alias

Returns:

expression

$

public static <D>
CollectionPath<D,SimpleExpression<D>> $(Collection<D> arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

public static <D extends Comparable<?>>
ComparablePath<D> $(D arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<Double> $(Double arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<Float> $(Float arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<Integer> $(Integer arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static DatePath<Date> $(Date arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static DateTimePath<Date> $(Date arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static <D> ListPath<D,SimpleExpression<D>> $(List<D> arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<Long> $(Long arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static <K,
V>
MapPath<K,V,SimpleExpression<V>> $(Map<K,V> arg)

Convert the given alias to an expression

Type Parameters:

K -

V -

Parameters:

arg - alias

Returns:

expression

$

public static <D> SetPath<D,SimpleExpression<D>> $(Set<D> arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<Short> $(Short arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static StringPath $(String arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static TimePath<Time> $(Time arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static DateTimePath<Timestamp> $(Timestamp arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

@Nullable
public static <D> @Nullable EntityPathBase<D> $(D arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

alias

public static <A> A alias(Class<A> cl)

Create a new alias proxy of the given type

Parameters:

cl - type of the alias

Returns:

alias instance

alias

public static <A> A alias(Class<A> cl,
 Expression<? extends A> expr)

Create a new alias proxy of the given type for the given expression

Parameters:

cl - type of the alias

expr - underlying expression

Returns:

alias instance

alias

public static <A> A alias(Class<A> cl,
 String var)

Create a new alias proxy of the given type for the given variable

Parameters:

cl - type of the alias

var - variable name for the underlying expression

Returns:

alias instance

getAny

public static <D> Expression<D> getAny(D arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias instance

Returns:

underlying expression

resetAlias

public static void resetAlias()

Reset the alias

var

public static <D> SimplePath<D> var()

Return the default variable

Type Parameters:

D -

Returns:

expression

var

public static <D extends Comparable<?>>
ComparablePath<D> var(D arg)

Create a new variable path

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

var

public static <D extends Number & Comparable<D>>
NumberPath<D> var(D arg)

Create a new variable path

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

var

public static <D> EntityPathBase<D> var(D arg)

Create a new variable path

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

var

public static StringPath var(String arg)

Create a new variable path

Parameters:

arg - alias

Returns:

expression