com.querydsl.mongodb.document

Class AbstractFetchableMongodbQuery<K,Q extends AbstractFetchableMongodbQuery<K,Q>>

java.lang.Object

com.querydsl.mongodb.document.AbstractMongodbQuery<Q>

com.querydsl.mongodb.document.AbstractFetchableMongodbQuery<K,Q>

Type Parameters:

K - result type

Q - concrete subtype

All Implemented Interfaces:

Fetchable<K>, FilteredClause<Q>, SimpleQuery<Q>

public abstract class AbstractFetchableMongodbQuery<K,Q extends AbstractFetchableMongodbQuery<K,Q>>
extends AbstractMongodbQuery<Q>
implements Fetchable<K>

Fetchable Mongodb query with a pluggable Document to Bean transformation.

Author:

Mark Paluch

Constructor Summary

Constructors

Constructor and Description
AbstractFetchableMongodbQuery(com.mongodb.client.MongoCollection<org.bson.Document> collection, java.util.function.Function<org.bson.Document,K> transformer, MongodbDocumentSerializer serializer) Create a new MongodbQuery instance

Method Summary

Modifier and Type	Method and Description
protected com.mongodb.client.FindIterable<org.bson.Document>	createCursor()
protected com.mongodb.client.FindIterable<org.bson.Document>	createCursor(com.mongodb.client.MongoCollection<org.bson.Document> collection, @Nullable Predicate where, Expression<?> projection, QueryModifiers modifiers, java.util.List<OrderSpecifier<?>> orderBy)
java.util.List<K>	fetch() Get the projection as a typed List
java.util.List<K>	fetch(Path<?>... paths) Fetch with the specific fields
long	fetchCount() Get the count of matched elements Note: not all QueryDSL modules might optimize fetchCount using a count query.
K	fetchFirst() Get the first result of Get the projection or null if no result is found
K	fetchFirst(Path<?>... paths) Fetch first with the specific fields
K	fetchOne() Get the projection as a unique result or null if no result is found
K	fetchOne(Path<?>... paths) Fetch one with the specific fields
QueryResults<K>	fetchResults() Get the projection in QueryResults form.
QueryResults<K>	fetchResults(Path<?>... paths) Fetch results with the specific fields
protected abstract com.mongodb.client.MongoCollection<org.bson.Document>	getCollection(java.lang.Class<?> type)
protected java.util.List<java.lang.Object>	getIds(java.lang.Class<?> targetType, Predicate condition)
com.mysema.commons.lang.CloseableIterator<K>	iterate() Get the projection as a typed closeable Iterator
com.mysema.commons.lang.CloseableIterator<K>	iterate(Path<?>... paths) Iterate with the specific fields

Methods inherited from class com.querydsl.mongodb.document.AbstractMongodbQuery

anyEmbedded, asDocument, createFilter, createJoinFilter, createProjection, createQuery, distinct, getQueryMixin, getReadPreference, getSerializer, join, join, limit, offset, orderBy, orderBy, restrict, set, setReadPreference, toString, where, where

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.querydsl.core.Fetchable

stream

Constructor Detail

AbstractFetchableMongodbQuery

public AbstractFetchableMongodbQuery(com.mongodb.client.MongoCollection<org.bson.Document> collection,
                                     java.util.function.Function<org.bson.Document,K> transformer,
                                     MongodbDocumentSerializer serializer)

Create a new MongodbQuery instance

Parameters:

collection -

transformer - result transformer

serializer - serializer

Method Detail

iterate

public com.mysema.commons.lang.CloseableIterator<K> iterate(Path<?>... paths)

Iterate with the specific fields

Parameters:

paths - fields to return

Returns:

iterator

iterate

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

Description copied from interface: Fetchable

Get the projection as a typed closeable Iterator

Specified by:

iterate in interface Fetchable<K>

Returns:

closeable iterator

fetch

public java.util.List<K> fetch(Path<?>... paths)

Fetch with the specific fields

Parameters:

paths - fields to return

Returns:

results

fetch

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

Description copied from interface: Fetchable

Get the projection as a typed List

Specified by:

fetch in interface Fetchable<K>

Returns:

results in list form

fetchFirst

public K fetchFirst(Path<?>... paths)

Fetch first with the specific fields

Parameters:

paths - fields to return

Returns:

first result

fetchFirst

public K fetchFirst()

Description copied from interface: Fetchable

Get the first result of Get the projection or null if no result is found

Specified by:

fetchFirst in interface Fetchable<K>

Returns:

first result or null

fetchOne

public K fetchOne(Path<?>... paths)

Fetch one with the specific fields

Parameters:

paths - fields to return

Returns:

first result

fetchOne

public K fetchOne()

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<K>

Returns:

first result or null

fetchResults

public QueryResults<K> fetchResults(Path<?>... paths)

Fetch results with the specific fields

Parameters:

paths - fields to return

Returns:

results

fetchResults

public QueryResults<K> 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<K>

Returns:

results

See Also:

Fetchable.fetch()

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<K>

Returns:

row count

createCursor

protected com.mongodb.client.FindIterable<org.bson.Document> createCursor()

createCursor

protected com.mongodb.client.FindIterable<org.bson.Document> createCursor(com.mongodb.client.MongoCollection<org.bson.Document> collection,
                                                                          @Nullable
                                                                          @Nullable Predicate where,
                                                                          Expression<?> projection,
                                                                          QueryModifiers modifiers,
                                                                          java.util.List<OrderSpecifier<?>> orderBy)

getCollection

protected abstract com.mongodb.client.MongoCollection<org.bson.Document> getCollection(java.lang.Class<?> type)

getIds

protected java.util.List<java.lang.Object> getIds(java.lang.Class<?> targetType,
                                                  Predicate condition)

Specified by:

getIds in class AbstractMongodbQuery<Q extends AbstractFetchableMongodbQuery<K,Q>>