com.asakusafw.testdriver.loader

Interface DataLoader<T>

Type Parameters:

T - the data type

All Known Implementing Classes:

BasicDataLoader

public interface DataLoader<T>

Loads a dataset and organize it for operator inputs.

Since:

0.9.1

Version:

0.10.2

Method Summary

Modifier and Type	Method and Description
List<T>	asList() Returns the loaded data as a list.
default Stream<T>	asStream() Returns the loaded data as a stream.
View<T>	asView() Returns the loaded data as a view.
GroupLoader<T>	group(String... terms) Configures the grouping key of the organizing dataset.
DataLoader<T>	order(Comparator<? super T> comparator) Configures the sort order of the organizing dataset.
DataLoader<T>	order(String... terms) Configures the sort order of the organizing dataset.

Method Detail

group

GroupLoader<T> group(String... terms)

Configures the grouping key of the organizing dataset. The form of each term must be like as Key.group().

Parameters:

terms - the property name of each key element

Returns:

the group loader

See Also:

Key.group()

order

DataLoader<T> order(String... terms)

Configures the sort order of the organizing dataset. The form of each term must be like as Key.order().

Parameters:

terms - the ordering term

Returns:

this

Throws:

IllegalStateException - if sort order is already configured

See Also:

Key.order()

order

DataLoader<T> order(Comparator<? super T> comparator)

Configures the sort order of the organizing dataset.

Parameters:

comparator - the object comparator

Returns:

this

Throws:

IllegalStateException - if sort order is already configured

asStream

default Stream<T> asStream()

Returns the loaded data as a stream.

Returns:

the organized stream

Since:

0.10.2

asList

List<T> asList()

Returns the loaded data as a list.

Returns:

the organized list

asView

View<T> asView()

Returns the loaded data as a view.

Returns:

the organized list