Package com.vaadin.ui

Interface ItemCollapseAllowedProvider<T>

Type Parameters:

T - item data type

All Superinterfaces:

Predicate<T>, Serializable, SerializablePredicate<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface ItemCollapseAllowedProvider<T>
extends SerializablePredicate<T>

A callback interface for resolving whether client-side collapsing should be allowed for an item in a listing component that displays hierarchical data, such as TreeGrid.

Since:

8.1

Author:

Vaadin Ltd

See Also:

TreeGrid.setItemCollapseAllowedProvider(ItemCollapseAllowedProvider)

Method Summary

Modifier and Type	Method	Description
boolean	test(T item)	Returns whether collapsing is allowed for the given item.

Methods inherited from interface java.util.function.Predicate

and, or

Methods inherited from interface com.vaadin.server.SerializablePredicate

and, negate, or

Method Detail

test

boolean test(T item)

Returns whether collapsing is allowed for the given item.

Specified by:

test in interface Predicate<T>

Parameters:

item - the item to test

Returns:

true if collapse is allowed for the given item, false otherwise