org.seasar.doma.jdbc.criteria.statement

Interface StreamMappable<ELEMENT>

Type Parameters:

ELEMENT - the element type of the stream

All Superinterfaces:

Buildable<Statement<java.util.List<ELEMENT>>>, Listable<ELEMENT>, Statement<java.util.List<ELEMENT>>

All Known Subinterfaces:

SetOperand<ELEMENT>, SetOperator<ELEMENT>

All Known Implementing Classes:

AbstractSetOperand, NativeSqlSelectIntermediate, NativeSqlSelectStarting, NativeSqlSetStarting

public interface StreamMappable<ELEMENT>
extends Listable<ELEMENT>

Represents that the implementation can fetch data from database as a stream and map it to something.

Method Summary

Modifier and Type	Method and Description
default <RESULT> RESULT	collect(java.util.stream.Collector<ELEMENT,?,RESULT> collector) Collect a stream.
<RESULT> RESULT	mapStream(java.util.function.Function<java.util.stream.Stream<ELEMENT>,RESULT> streamMapper) Map a stream.
java.util.stream.Stream<ELEMENT>	openStream() Open a stream.
StreamMappable<ELEMENT>	peek(java.util.function.Consumer<Sql<?>> consumer) Peeks the built SQL.

Methods inherited from interface org.seasar.doma.jdbc.criteria.statement.Listable

fetch, fetchOne, fetchOptional, stream

Methods inherited from interface org.seasar.doma.jdbc.criteria.statement.Statement

execute

Methods inherited from interface org.seasar.doma.jdbc.criteria.statement.Buildable

asSql

Method Detail

openStream

java.util.stream.Stream<ELEMENT> openStream()

Open a stream.

You must close the stream after using it.

Returns:

the opened stream

mapStream

<RESULT> RESULT mapStream(java.util.function.Function<java.util.stream.Stream<ELEMENT>,RESULT> streamMapper)

Map a stream.

Type Parameters:

RESULT - the mapped result

Parameters:

streamMapper - the mapper

Returns:

the mapped result

collect

default <RESULT> RESULT collect(java.util.stream.Collector<ELEMENT,?,RESULT> collector)

Collect a stream.

Type Parameters:

RESULT - the collected result

Parameters:

collector - the collector

Returns:

the collected result

peek

StreamMappable<ELEMENT> peek(java.util.function.Consumer<Sql<?>> consumer)

Description copied from interface: Buildable

Peeks the built SQL.

Specified by:

peek in interface Buildable<Statement<java.util.List<ELEMENT>>>

Specified by:

peek in interface Listable<ELEMENT>

Specified by:

peek in interface Statement<java.util.List<ELEMENT>>

Parameters:

consumer - the SQL handler

Returns:

this instance