com.speedment.runtime.field.method

Interface FindFrom<ENTITY,FK_ENTITY>

Type Parameters:

ENTITY - the source entity

FK_ENTITY - the target entity

All Superinterfaces:

Function<ENTITY,FK_ENTITY>

public interface FindFrom<ENTITY,FK_ENTITY>
extends Function<ENTITY,FK_ENTITY>

A handle for a find-operation that can be replaced runtime to optimize a Stream. Formally, a FindFrom has the following signature: FK_ENTITY apply(ENTITY entity);

Each FindFrom contains metadata of which fields it compares to determine the mapping as well as a reference to the foreign manager.

Since:

3.0.0

Author:

Emil Forslund

Method Summary

Modifier and Type	Method and Description
Field<ENTITY>	getSourceField() Returns the field that the stream originates from.
TableIdentifier<FK_ENTITY>	getTableIdentifier() Returns the identifier for the referenced (foreign) table.
Field<FK_ENTITY>	getTargetField() Returns the field that the stream references.

Methods inherited from interface java.util.function.Function

andThen, apply, compose, identity

Method Detail

getSourceField

Field<ENTITY> getSourceField()

Returns the field that the stream originates from.

In the following example, foo is the source: foos.stream() .flatMap(foo.findBars()) // findBars returns Streamer<Foo, Bar> .forEach(...);

Returns:

the source field

getTargetField

Field<FK_ENTITY> getTargetField()

Returns the field that the stream references.

In the following example, bar is the target: foos.stream() .flatMap(foo.findBars()) // findBars returns Streamer<Foo, Bar> .forEach(...);

Returns:

the target field

getTableIdentifier

TableIdentifier<FK_ENTITY> getTableIdentifier()

Returns the identifier for the referenced (foreign) table.

Returns:

target (foreign) table identifier