com.helger.commons.hierarchy

Interface IHierarchyWalkerDynamicCallback<DATATYPE>

Type Parameters:

DATATYPE - The type of object to be iterated.

All Superinterfaces:

IBaseHierarchyWalker

All Known Implementing Classes:

DefaultHierarchyWalkerDynamicCallback

public interface IHierarchyWalkerDynamicCallback<DATATYPE>
extends IBaseHierarchyWalker

Interface for walking a hierarchy including possibilities to alter they way how the hierarchy is iterated.

Author:

Philip Helger

Method Summary

Methods

Modifier and Type	Method and Description
EHierarchyCallbackReturn	onItemAfterChildren(DATATYPE aItem) Called after eventual children of the current item were iterated.
EHierarchyCallbackReturn	onItemBeforeChildren(DATATYPE aItem) Called before eventual children of the current item are iterated.

Methods inherited from interface com.helger.commons.hierarchy.IBaseHierarchyWalker

begin, end, getLevel, onLevelDown, onLevelUp

Method Detail

onItemBeforeChildren

@Nonnull
EHierarchyCallbackReturn onItemBeforeChildren(DATATYPE aItem)

Called before eventual children of the current item are iterated.

Parameters:

aItem - The current item. May be null.

Returns:

A non-null status code that determines how to continue iteration.

onItemAfterChildren

@Nonnull
EHierarchyCallbackReturn onItemAfterChildren(DATATYPE aItem)

Called after eventual children of the current item were iterated.

Parameters:

aItem - The current item. May be null.

Returns:

A non-null status code that determines how to continue iteration.