eu.vaadinonkotlin.vaadin8.sql2o

Class DataLoaderAdapter<T>

eu.vaadinonkotlin.vaadin8.sql2o.DataLoaderAdapter<T>

Type Parameters:

T - the type of items returned by this data provider.

public class DataLoaderAdapter<T>

A Vaadin com.vaadin.data.provider.DataProvider implementation which delegates the data-fetching calls to a VoK-ORM DataLoader; an adapter which adapts calls to Vaadin DataProvider to VoK-ORM DataLoader.

Constructor Summary

Constructors

Constructor and Description
DataLoaderAdapter(java.lang.Class<T> clazz, com.github.vokorm.dataloader.DataLoader<T> loader, kotlin.jvm.functions.Function1<? super T,? extends java.lang.Object> idResolver) A Vaadin com.vaadin.data.provider.DataProvider implementation which delegates the data-fetching calls to a VoK-ORM DataLoader; an adapter which adapts calls to Vaadin DataProvider to VoK-ORM DataLoader.

Method Summary

Modifier and Type	Method and Description
java.util.stream.Stream<T>	fetchFromBackEnd(com.vaadin.data.provider.Query<T,com.github.vokorm.Filter> query)
java.lang.Class<T>	getClazz()
java.lang.Object	getId(T item)
int	sizeInBackEnd(com.vaadin.data.provider.Query<T,com.github.vokorm.Filter> query)
java.lang.String	toString()

Constructor Detail

DataLoaderAdapter

public DataLoaderAdapter(java.lang.Class<T> clazz,
                         com.github.vokorm.dataloader.DataLoader<T> loader,
                         kotlin.jvm.functions.Function1<? super T,? extends java.lang.Object> idResolver)

A Vaadin com.vaadin.data.provider.DataProvider implementation which delegates the data-fetching calls to a VoK-ORM DataLoader; an adapter which adapts calls to Vaadin DataProvider to VoK-ORM DataLoader.

Parameters:

loader - performs the actual data fetching. All data-fetching calls are delegated here.

idResolver - provides unique ID for every item. The ID is then used to differentiate items.See com.vaadin.data.provider.DataProvider.getId for more details. Typically every itemhas a primary key of type Long, but any Java/Kotlin object with properly written Any.equals and Any.hashCode can act as the ID,including the item itself.

loader - performs the actual data fetching. All data-fetching calls are delegated here.

idResolver - provides unique ID for every item. The ID is then used to differentiate items. See com.vaadin.data.provider.DataProvider.getId for more details. Typically every item has a primary key of type Long, but any Java/Kotlin object with properly written Any.equals and Any.hashCode can act as the ID, including the item itself.

Method Detail

getId

public java.lang.Object getId(T item)

toString

public java.lang.String toString()

sizeInBackEnd

public int sizeInBackEnd(com.vaadin.data.provider.Query<T,com.github.vokorm.Filter> query)

fetchFromBackEnd

public java.util.stream.Stream<T> fetchFromBackEnd(com.vaadin.data.provider.Query<T,com.github.vokorm.Filter> query)

getClazz

public java.lang.Class<T> getClazz()