com.vaadin.flow.data.provider.hierarchy.

java.lang.Object
- com.vaadin.flow.data.provider.hierarchy.HierarchicalCommunicationController<T>

Type Parameters:

T - the target bean type

All Implemented Interfaces:

Serializable
```
public class HierarchicalCommunicationController<T>
extends Object
implements Serializable
```
HierarchicalCommunicationController controls all the communication to client.

Since:

1.2

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`HierarchicalCommunicationController(String parentKey, DataKeyMapper<T> keyMapper, HierarchyMapper<T,?> mapper, DataGenerator<T> dataGenerator, SerializableFunction<Integer,HierarchicalArrayUpdater.HierarchicalUpdate> startUpdate, SerializableBiFunction<String,Range,Stream<T>> fetchItems)`	Constructs communication controller with support for hierarchical data structure.

Method Summary

All Methods
Modifier and Type	Method	Description
`void`	`confirmUpdate(int updateId)`
`void`	`flush()`
`elemental.json.JsonValue`	`generateJson(T item)`
`void`	`setRequestRange(int start, int length)`
`void`	`setResendEntireRange(boolean resend)`
`void`	`unregisterPassivatedKeys()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HierarchicalCommunicationController

public HierarchicalCommunicationController(String parentKey,
                                           DataKeyMapper<T> keyMapper,
                                           HierarchyMapper<T,?> mapper,
                                           DataGenerator<T> dataGenerator,
                                           SerializableFunction<Integer,HierarchicalArrayUpdater.HierarchicalUpdate> startUpdate,
                                           SerializableBiFunction<String,Range,Stream<T>> fetchItems)

Constructs communication controller with support for hierarchical data structure.

Parameters:

parentKey - parent key or null if root

keyMapper - Object to String key mapper

mapper - Mapper for hierarchical data

dataGenerator - A data generator for items

startUpdate - Function for creating a new ArrayUpdater.Update for client

fetchItems - Function for fetching items for target parent and specified range

Method Detail

flush
```
public void flush()
```

confirmUpdate

public void confirmUpdate(int updateId)

setRequestRange

public void setRequestRange(int start,
                            int length)

setResendEntireRange

public void setResendEntireRange(boolean resend)

unregisterPassivatedKeys

public void unregisterPassivatedKeys()

generateJson

public elemental.json.JsonValue generateJson(T item)