com.querydsl.core.alias

Class Alias

java.lang.Object

com.querydsl.core.alias.Alias

public final class Alias
extends java.lang.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 and Description
static <D extends Expression<?>> D	$() Convert the given alias to an expression
static NumberPath<java.math.BigDecimal>	$(java.math.BigDecimal arg) Convert the given alias to an expression
static NumberPath<java.math.BigInteger>	$(java.math.BigInteger arg) Convert the given alias to an expression
static BooleanPath	$(java.lang.Boolean arg) Convert the given alias to an expression
static NumberPath<java.lang.Byte>	$(java.lang.Byte arg) Convert the given alias to an expression
static <D> CollectionPath<D,SimpleExpression<D>>	$(java.util.Collection<D> arg) Convert the given alias to an expression
static <D> @Nullable EntityPathBase<D>	$(D arg) Convert the given alias to an expression
static <D extends java.lang.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 DatePath<java.sql.Date>	$(java.sql.Date arg) Convert the given alias to an expression
static DateTimePath<java.util.Date>	$(java.util.Date arg) Convert the given alias to an expression
static NumberPath<java.lang.Double>	$(java.lang.Double arg) Convert the given alias to an expression
static NumberPath<java.lang.Float>	$(java.lang.Float arg) Convert the given alias to an expression
static NumberPath<java.lang.Integer>	$(java.lang.Integer arg) Convert the given alias to an expression
static <D> ListPath<D,SimpleExpression<D>>	$(java.util.List<D> arg) Convert the given alias to an expression
static NumberPath<java.lang.Long>	$(java.lang.Long arg) Convert the given alias to an expression
static <K,V> MapPath<K,V,SimpleExpression<V>>	$(java.util.Map<K,V> arg) Convert the given alias to an expression
static <D> SetPath<D,SimpleExpression<D>>	$(java.util.Set<D> arg) Convert the given alias to an expression
static NumberPath<java.lang.Short>	$(java.lang.Short arg) Convert the given alias to an expression
static StringPath	$(java.lang.String arg) Convert the given alias to an expression
static <T extends java.lang.Enum<T>> EnumPath<T>	$(T arg) Convert the given alias to an expression
static TimePath<java.sql.Time>	$(java.sql.Time arg) Convert the given alias to an expression
static DateTimePath<java.sql.Timestamp>	$(java.sql.Timestamp arg) Convert the given alias to an expression
static <A> A	alias(java.lang.Class<A> cl) Create a new alias proxy of the given type
static <A> A	alias(java.lang.Class<A> cl, Expression<? extends A> expr) Create a new alias proxy of the given type for the given expression
static <A> A	alias(java.lang.Class<A> cl, java.lang.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> EntityPathBase<D>	var(D arg) Create a new variable path
static <D extends java.lang.Comparable<?>> ComparablePath<D>	var(D arg) Create a new variable path
static <D extends java.lang.Number & java.lang.Comparable<D>> NumberPath<D>	var(D arg) Create a new variable path
static StringPath	var(java.lang.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 Detail

$

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<java.math.BigDecimal> $(java.math.BigDecimal arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<java.math.BigInteger> $(java.math.BigInteger arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static BooleanPath $(java.lang.Boolean arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<java.lang.Byte> $(java.lang.Byte arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static <T extends java.lang.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>> $(java.util.Collection<D> arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

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

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<java.lang.Double> $(java.lang.Double arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<java.lang.Float> $(java.lang.Float arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<java.lang.Integer> $(java.lang.Integer arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static DatePath<java.sql.Date> $(java.sql.Date arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static DateTimePath<java.util.Date> $(java.util.Date arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

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

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<java.lang.Long> $(java.lang.Long arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static <K,V> MapPath<K,V,SimpleExpression<V>> $(java.util.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>> $(java.util.Set<D> arg)

Convert the given alias to an expression

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

$

public static NumberPath<java.lang.Short> $(java.lang.Short arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static StringPath $(java.lang.String arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static TimePath<java.sql.Time> $(java.sql.Time arg)

Convert the given alias to an expression

Parameters:

arg - alias

Returns:

expression

$

public static DateTimePath<java.sql.Timestamp> $(java.sql.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(java.lang.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(java.lang.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(java.lang.Class<A> cl,
                          java.lang.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 java.lang.Comparable<?>> ComparablePath<D> var(D arg)

Create a new variable path

Type Parameters:

D -

Parameters:

arg - alias

Returns:

expression

var

public static <D extends java.lang.Number & java.lang.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(java.lang.String arg)

Create a new variable path

Parameters:

arg - alias

Returns:

expression