com.holonplatform.vaadin7.data

Interface ItemDataProvider<ITEM>

Type Parameters:

ITEM - Item data type

All Superinterfaces:

ItemRefresher<ITEM>, ItemSetCounter, ItemSetLoader<ITEM>, Serializable

public interface ItemDataProvider<ITEM>
extends ItemSetCounter, ItemSetLoader<ITEM>, ItemRefresher<ITEM>

Iterface to load items data from a data source.

Since:

5.0.0

Method Summary

Modifier and Type	Method and Description
static <T,ITEM> ItemDataProvider<T>	convert(ItemDataProvider<ITEM> provider, Function<ITEM,T> converter) Create a new ItemDataProvider which wraps a concrete data provider and converts items into a different type using a converter function.
static ItemDataProvider<com.holonplatform.core.property.PropertyBox>	create(com.holonplatform.core.datastore.Datastore datastore, com.holonplatform.core.datastore.DataTarget<?> target, com.holonplatform.core.property.PropertySet<?> propertySet) Construct a ItemDataProvider using a Datastore.
static <ITEM> ItemDataProvider<ITEM>	create(ItemSetCounter counter, ItemSetLoader<ITEM> loader) Create an ItemDataProvider using given operations.
static <ITEM> ItemDataProvider<ITEM>	create(ItemSetCounter counter, ItemSetLoader<ITEM> loader, ItemRefresher<ITEM> refresher) Create an ItemDataProvider using given operations.
default ITEM	refresh(ITEM item) Refresh given item from concrete data store.

Methods inherited from interface com.holonplatform.vaadin7.data.ItemSetCounter

size

Methods inherited from interface com.holonplatform.vaadin7.data.ItemSetLoader

load

Method Detail

refresh

default ITEM refresh(ITEM item)
              throws UnsupportedOperationException,
                     com.holonplatform.core.exceptions.DataAccessException

Description copied from interface: ItemRefresher

Refresh given item from concrete data store.

Specified by:

refresh in interface ItemRefresher<ITEM>

Parameters:

item - Item to refresh (not null)

Returns:

Refreshed item

Throws:

UnsupportedOperationException - If the refresh operation is not supported by concrete implementation

com.holonplatform.core.exceptions.DataAccessException - Error accessing underlying data store

create

static <ITEM> ItemDataProvider<ITEM> create(ItemSetCounter counter,
                                            ItemSetLoader<ITEM> loader)

Create an ItemDataProvider using given operations.

Type Parameters:

ITEM - Item data type

Parameters:

counter - Items counter (not null)

loader - Items loader (not null)

Returns:

A new ItemDataProvider instance

create

static <ITEM> ItemDataProvider<ITEM> create(ItemSetCounter counter,
                                            ItemSetLoader<ITEM> loader,
                                            ItemRefresher<ITEM> refresher)

Create an ItemDataProvider using given operations.

Type Parameters:

ITEM - Item data type

Parameters:

counter - Items counter (not null)

loader - Items loader (not null)

refresher - Item refresher

Returns:

A new ItemDataProvider instance

create

static ItemDataProvider<com.holonplatform.core.property.PropertyBox> create(com.holonplatform.core.datastore.Datastore datastore,
                                                                            com.holonplatform.core.datastore.DataTarget<?> target,
                                                                            com.holonplatform.core.property.PropertySet<?> propertySet)

Construct a ItemDataProvider using a Datastore.

Parameters:

datastore - Datastore to use (not null)

target - Data target (not null)

propertySet - Property set to load

Returns:

A new ItemDataProvider instance

convert

static <T,ITEM> ItemDataProvider<T> convert(ItemDataProvider<ITEM> provider,
                                            Function<ITEM,T> converter)

Create a new ItemDataProvider which wraps a concrete data provider and converts items into a different type using a converter function.

Type Parameters:

ITEM - Item type

T - Conversion type

Parameters:

provider - Concrete data privider (not null)

converter - Converter function (not null)

Returns:

the data provider wrapper