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Java 1.8+ Library with tree structures

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/**
 * Copyright (C) 2014-2016 Philip Helger (www.helger.com)
 * philip[at]helger[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.helger.tree.singleton;

import javax.annotation.Nonnull;

import com.helger.commons.scope.singleton.AbstractApplicationSingleton;
import com.helger.tree.withid.unique.DefaultTreeWithGlobalUniqueID;

/**
 * Represents a global singleton tree with a unique ID. It basically is a
 * {@link AbstractApplicationSingleton} wrapping a
 * {@link DefaultTreeWithGlobalUniqueID} with the same API.
 *
 * @author Philip Helger
 * @param 
 *        Tree key type
 * @param 
 *        Tree value type
 */
public abstract class AbstractApplicationSingletonTreeWithUniqueID 
                                                                   extends AbstractApplicationSingleton implements
                                                                   ITreeWithUniqueIDProxy 
{
  protected final DefaultTreeWithGlobalUniqueID  m_aTree = new DefaultTreeWithGlobalUniqueID<> ();

  public AbstractApplicationSingletonTreeWithUniqueID ()
  {}

  @Nonnull
  public final DefaultTreeWithGlobalUniqueID  getProxyTree ()
  {
    return m_aTree;
  }
}