Package io.ebean.typequery

Class TQAssocBean<T,R>

java.lang.Object

io.ebean.typequery.TQProperty<R>

io.ebean.typequery.TQAssocBean<T,R>

Type Parameters:

T - the entity bean type (normal entity bean type e.g. Customer)

R - the specific root query bean type (e.g. QCustomer)

public abstract class TQAssocBean<T,R>
extends TQProperty<R>

Base type for associated beans.

Constructor Summary

Constructors

Constructor	Description
TQAssocBean(String name, R root)	Construct with a property name and root instance.
TQAssocBean(String name, R root, String prefix)	Construct with additional path prefix.

Method Summary

Modifier and Type	Method	Description
R	eq(T other)	Is equal to by ID property.
R	equalTo(T other)	Is equal to by ID property.
R	fetch()	Eagerly fetch this association fetching all the properties.
R	fetch(String properties)	Eagerly fetch this association with the properties specified.
R	fetchAll()	Deprecated.
R	fetchCache()	Eagerly fetch this association using L2 bean cache.
R	fetchCache(String properties)	Eagerly fetch this association using L2 cache with the properties specified.
R	fetchLazy()	Use lazy loading for fetching this association.
R	fetchQuery()	Eagerly fetch this association using a "query join".
R	fetchQuery(String properties)	Eagerly fetch this association using a "query join" with the properties specified.
R	filterMany(io.ebean.ExpressionList<T> filter)	Apply a filter when fetching these beans.
R	filterMany(String expressions, Object... params)	Apply a filter when fetching these beans.
R	isEmpty()	Is empty for a collection property.
R	isNotEmpty()	Is not empty for a collection property.
R	ne(T other)	Is not equal to by ID property.
R	notEqualTo(T other)	Is not equal to by ID property.

Methods inherited from class io.ebean.typequery.TQProperty

isNotNull, isNull, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TQAssocBean

public TQAssocBean(String name,
                   R root)

Construct with a property name and root instance.

Parameters:

name - the name of the property

root - the root query bean instance

TQAssocBean

public TQAssocBean(String name,
                   R root,
                   String prefix)

Construct with additional path prefix.

Method Detail

fetch

public R fetch()

Eagerly fetch this association fetching all the properties.

fetchQuery

public R fetchQuery()

Eagerly fetch this association using a "query join".

fetchCache

public R fetchCache()

Eagerly fetch this association using L2 bean cache. Cache misses are populated via fetchQuery().

fetchLazy

public R fetchLazy()

Use lazy loading for fetching this association.

fetch

public R fetch(String properties)

Eagerly fetch this association with the properties specified.

fetchQuery

public R fetchQuery(String properties)

Eagerly fetch this association using a "query join" with the properties specified.

fetchCache

public R fetchCache(String properties)

Eagerly fetch this association using L2 cache with the properties specified. Cache misses are populated via fetchQuery().

fetchAll

public R fetchAll()

Deprecated.

Deprecated in favor of fetch().

eq

public R eq(T other)

Is equal to by ID property.

equalTo

public R equalTo(T other)

Is equal to by ID property.

ne

public R ne(T other)

Is not equal to by ID property.

notEqualTo

public R notEqualTo(T other)

Is not equal to by ID property.

filterMany

public R filterMany(io.ebean.ExpressionList<T> filter)

Apply a filter when fetching these beans.

filterMany

public R filterMany(String expressions,
                    Object... params)

Apply a filter when fetching these beans.

The expressions can use any valid Ebean expression and contain placeholders for bind values using ? or ?1 style.

     new QCustomer()
       .name.startsWith("Postgres")
       .contacts.filterMany("firstName istartsWith ?", "Rob")
       .findList();

 

     new QCustomer()
       .name.startsWith("Postgres")
       .contacts.filterMany("whenCreated inRange ? to ?", startDate, endDate)
       .findList();

 

Parameters:

expressions - The expressions including and, or, not etc with ? and ?1 bind params.

params - The bind parameter values

isEmpty

public R isEmpty()

Is empty for a collection property.

This effectively adds a not exists sub-query on the collection property.

This expression only works on OneToMany and ManyToMany properties.

isNotEmpty

public R isNotEmpty()

Is not empty for a collection property.

This effectively adds an exists sub-query on the collection property.

This expression only works on OneToMany and ManyToMany properties.