com.mysema.query.jdo

Class JDOSubQuery

java.lang.Object

com.mysema.query.support.QueryBase<Q>

com.mysema.query.support.DetachableQuery<Q>

com.mysema.query.jdo.AbstractJDOSubQuery<JDOSubQuery>

com.mysema.query.jdo.JDOSubQuery

All Implemented Interfaces:

Detachable, FilteredClause<JDOSubQuery>, JDOCommonQuery<JDOSubQuery>, Query<JDOSubQuery>, SimpleQuery<JDOSubQuery>

public class JDOSubQuery
extends AbstractJDOSubQuery<JDOSubQuery>

JDOSubQuery is subquery implementation for JDOQL

Author:

tiwe

Field Summary

Fields inherited from class com.mysema.query.support.QueryBase

MDC_PARAMETERS, MDC_QUERY, queryMixin

Constructor Summary

Constructors

Constructor and Description
JDOSubQuery()
JDOSubQuery(QueryMetadata metadata)

Method Summary

Methods

Modifier and Type	Method and Description
NumberSubQuery<Long>	count() Return the count of matched rows as a sub query
BooleanExpression	exists() Create an exists(this) expression
BooleanExpression	notExists() Create an not exists(this) expression

Methods inherited from class com.mysema.query.jdo.AbstractJDOSubQuery

from, from, from, toString

Methods inherited from class com.mysema.query.support.DetachableQuery

list, list, list, list, unique, unique, unique, unique, unique, unique, unique, unique, unique, unique

Methods inherited from class com.mysema.query.support.QueryBase

distinct, equals, groupBy, groupBy, hashCode, having, having, limit, offset, orderBy, orderBy, restrict, set, where, where

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.mysema.query.Query

groupBy, having

Methods inherited from interface com.mysema.query.SimpleQuery

distinct, limit, offset, orderBy, restrict, set

Methods inherited from interface com.mysema.query.FilteredClause

where

Constructor Detail

JDOSubQuery

public JDOSubQuery()

JDOSubQuery

public JDOSubQuery(QueryMetadata metadata)

Method Detail

exists

public BooleanExpression exists()

Description copied from interface: Detachable

Create an exists(this) expression

Usage

query.where(subQuery.from(customer).where(...).exists())

Specified by:

exists in interface Detachable

Overrides:

exists in class DetachableQuery<JDOSubQuery>

Returns:

notExists

public BooleanExpression notExists()

Description copied from interface: Detachable

Create an not exists(this) expression

Usage

query.where(subQuery.from(customer).where(...).notExists())

Specified by:

notExists in interface Detachable

Overrides:

notExists in class DetachableQuery<JDOSubQuery>

Returns:

count

public NumberSubQuery<Long> count()

Description copied from interface: Detachable

Return the count of matched rows as a sub query

Usage

query.where(subQuery.from(customer).where(...).count().gt(1))

Specified by:

count in interface Detachable

Overrides:

count in class DetachableQuery<JDOSubQuery>

Returns: