com.querydsl.jdo

Class AbstractJDOQuery<T,Q extends AbstractJDOQuery<T,Q>>

java.lang.Object

com.querydsl.core.support.QueryBase<Q>

com.querydsl.core.support.FetchableQueryBase<T,Q>

com.querydsl.core.support.FetchableSubQueryBase<T,Q>

com.querydsl.jdo.AbstractJDOQuery<T,Q>

Type Parameters:

T - result type

Q - concrete subclass

All Implemented Interfaces:

Fetchable<T>, FetchableQuery<T,JDOQLQuery<T>>, FilteredClause<JDOQLQuery<T>>, Query<JDOQLQuery<T>>, SimpleQuery<JDOQLQuery<T>>, ExtendedSubQuery<T>, Expression<T>, SubQueryExpression<T>, JDOQLQuery<T>, java.io.Closeable, java.io.Serializable, java.lang.AutoCloseable

Direct Known Subclasses:

JDOQuery

public abstract class AbstractJDOQuery<T,Q extends AbstractJDOQuery<T,Q>>
extends FetchableSubQueryBase<T,Q>
implements JDOQLQuery<T>

Abstract base class for custom implementations of the JDOQLQuery interface.

Author:

tiwe

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Set<java.lang.String>	fetchGroups
protected @Nullable java.lang.Integer	maxFetchDepth

Fields inherited from class com.querydsl.core.support.QueryBase

MDC_PARAMETERS, MDC_QUERY, queryMixin

Constructor Summary

Constructors

Constructor and Description
AbstractJDOQuery(@Nullable javax.jdo.PersistenceManager persistenceManager)
AbstractJDOQuery(@Nullable javax.jdo.PersistenceManager persistenceManager, JDOQLTemplates templates, QueryMetadata metadata, boolean detach)

Method Summary

Modifier and Type	Method and Description
Q	addFetchGroup(java.lang.String fetchGroupName) Add the fetch group to the set of active fetch groups.
void	close() Close the query and related resources
java.util.List<T>	fetch() Get the projection as a typed List
long	fetchCount() Get the count of matched elements Note: not all QueryDSL modules might optimize fetchCount using a count query.
T	fetchOne() Get the projection as a unique result or null if no result is found
QueryResults<T>	fetchResults() Get the projection in QueryResults form.
<U> Q	from(CollectionExpression<?,U> path, Path<U> alias) Add query sources
Q	from(EntityPath<?>... args) Add query sources
JDOQLTemplates	getTemplates()
boolean	isDetach()
com.mysema.commons.lang.CloseableIterator<T>	iterate() Get the projection as a typed closeable Iterator
protected void	logQuery(java.lang.String queryString, java.util.Map<java.lang.Object,java.lang.String> parameters)
Q	setMaxFetchDepth(int depth) Set the maximum fetch depth when fetching.
java.util.stream.Stream<T>	stream() Get the projection as a typed closeable Stream.
java.lang.String	toString()

Methods inherited from class com.querydsl.core.support.FetchableSubQueryBase

accept, contains, contains, eq, eq, exists, getMetadata, getType, goe, goe, gt, gt, hashCode, in, in, isNotNull, isNull, loe, loe, lt, lt, ne, ne, notExists

Methods inherited from class com.querydsl.core.support.FetchableQueryBase

equals, fetchFirst, transform, uniqueResult

Methods inherited from class com.querydsl.core.support.QueryBase

distinct, groupBy, groupBy, 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.querydsl.jdo.JDOQLQuery

clone

Methods inherited from interface com.querydsl.core.FetchableQuery

select, select, transform

Methods inherited from interface com.querydsl.core.Fetchable

fetchFirst

Methods inherited from interface com.querydsl.core.Query

groupBy, having

Methods inherited from interface com.querydsl.core.SimpleQuery

distinct, limit, offset, orderBy, restrict, set

Methods inherited from interface com.querydsl.core.FilteredClause

where

Methods inherited from interface com.querydsl.core.support.ExtendedSubQuery

contains, contains, eq, eq, exists, goe, goe, gt, gt, in, in, isNotNull, isNull, loe, loe, lt, lt, ne, ne, notExists

Methods inherited from interface com.querydsl.core.types.SubQueryExpression

getMetadata

Methods inherited from interface com.querydsl.core.types.Expression

accept, getType

Field Detail

fetchGroups

protected final java.util.Set<java.lang.String> fetchGroups

maxFetchDepth

@Nullable
protected @Nullable java.lang.Integer maxFetchDepth

Constructor Detail

AbstractJDOQuery

public AbstractJDOQuery(@Nullable
                        @Nullable javax.jdo.PersistenceManager persistenceManager)

AbstractJDOQuery

public AbstractJDOQuery(@Nullable
                        @Nullable javax.jdo.PersistenceManager persistenceManager,
                        JDOQLTemplates templates,
                        QueryMetadata metadata,
                        boolean detach)

Method Detail

addFetchGroup

public Q addFetchGroup(java.lang.String fetchGroupName)

Add the fetch group to the set of active fetch groups.

Specified by:

addFetchGroup in interface JDOQLQuery<T>

Parameters:

fetchGroupName - fetch group name

Returns:

the current object

close

public void close()

Close the query and related resources

Specified by:

close in interface JDOQLQuery<T>

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

fetchCount

public long fetchCount()

Description copied from interface: Fetchable

Get the count of matched elements Note: not all QueryDSL modules might optimize fetchCount using a count query. An implementation is allowed to fall back to fetch().size().

Specified by:

fetchCount in interface Fetchable<T>

Returns:

row count

logQuery

protected void logQuery(java.lang.String queryString,
                        java.util.Map<java.lang.Object,java.lang.String> parameters)

from

public Q from(EntityPath<?>... args)

Description copied from interface: JDOQLQuery

Add query sources

Specified by:

from in interface JDOQLQuery<T>

Parameters:

args - sources

Returns:

the current object

from

public <U> Q from(CollectionExpression<?,U> path,
                  Path<U> alias)

Description copied from interface: JDOQLQuery

Add query sources

Specified by:

from in interface JDOQLQuery<T>

Parameters:

path - source

alias - alias

Returns:

the current object

getTemplates

public JDOQLTemplates getTemplates()

isDetach

public boolean isDetach()

iterate

public com.mysema.commons.lang.CloseableIterator<T> iterate()

Description copied from interface: Fetchable

Get the projection as a typed closeable Iterator

Specified by:

iterate in interface Fetchable<T>

Returns:

closeable iterator

stream

public java.util.stream.Stream<T> stream()

Description copied from interface: Fetchable

Get the projection as a typed closeable Stream.

Specified by:

stream in interface Fetchable<T>

Returns:

closeable stream

fetch

public java.util.List<T> fetch()

Description copied from interface: Fetchable

Get the projection as a typed List

Specified by:

fetch in interface Fetchable<T>

Overrides:

fetch in class FetchableQueryBase<T,Q extends AbstractJDOQuery<T,Q>>

Returns:

results in list form

fetchResults

public QueryResults<T> fetchResults()

Description copied from interface: Fetchable

Get the projection in QueryResults form. Make sure to use Fetchable.fetch() instead if you do not rely on the QueryResults.getOffset() or QueryResults.getLimit(), because it will be more performant. Also, count queries cannot be properly generated for all dialects. For example: in JPA count queries can't be generated for queries that have multiple group by expressions or a having clause. Get the projection in QueryResults form. Use Fetchable.fetch() instead if you do not need the total count of rows in the query result.

Specified by:

fetchResults in interface Fetchable<T>

Returns:

results

See Also:

Fetchable.fetch()

setMaxFetchDepth

public Q setMaxFetchDepth(int depth)

Set the maximum fetch depth when fetching. A value of 0 has no meaning and will throw a JDOUserException. A value of -1 means that no limit is placed on fetching. A positive integer will result in that number of references from the initial object to be fetched.

Specified by:

setMaxFetchDepth in interface JDOQLQuery<T>

Parameters:

depth - fetch depth

Returns:

the current object

toString

public java.lang.String toString()

Overrides:

toString in class QueryBase<Q extends AbstractJDOQuery<T,Q>>

fetchOne

@Nullable
public T fetchOne()
                     throws NonUniqueResultException

Description copied from interface: Fetchable

Get the projection as a unique result or null if no result is found

Specified by:

fetchOne in interface Fetchable<T>

Returns:

first result or null

Throws:

NonUniqueResultException - if there is more than one matching result