com.phloc.commons.tree.IBasicTree Maven / Gradle / Ivy
/**
* Copyright (C) 2006-2014 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.phloc.commons.tree;
import javax.annotation.Nonnull;
/**
* Base interface for a tree.
*
* @param
* tree item value type
* @param
* tree item implementation type
* @author Philip Helger
*/
public interface IBasicTree >
{
/**
* @return The root item of the tree. Never null. The root item
* should not be displayed but it is the parent node of all displayed
* root items and therefor cannot be removed.
*/
@Nonnull
ITEMTYPE getRootItem ();
}