/*
 * All content copyright Terracotta, Inc., unless otherwise indicated.
 *
 * 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 org.terracotta.context;

import org.terracotta.statistics.StatisticsManager;

import java.util.Collection;
import java.util.List;
import java.util.Set;

Node used to wrap real tree node to keep the context object. Only used by ContextManager.nodeFor(Object) to allow the fluent interface to forward the context to TreeNode methods. 
 Currently, the only method using it is clean() that will make sure the context is removed from the PassThroughStatistic /**
 * Node used to wrap real tree node to keep the context object. Only used
 * by {@link ContextManager#nodeFor(Object)} to allow the fluent interface
 * to forward the context to {@link TreeNode} methods.
 * <p>
 * Currently, the only method using it is {@link ContextAwareTreeNode#clean()}
 * that will make sure the context is removed from the {@link org.terracotta.statistics.PassThroughStatistic}
 */
class ContextAwareTreeNode implements TreeNode {

  private final Object context;
  private final TreeNode wrappedNode;

  public ContextAwareTreeNode(TreeNode node, Object context) {
    this.context = context;
    this.wrappedNode = node;
  }

  @Override
  public Set<? extends TreeNode> getChildren() {
    return wrappedNode.getChildren();
  }

  @Override
  public List<? extends TreeNode> getPath() throws IllegalStateException {
    return wrappedNode.getPath();
  }

  @Override
  public Collection<List<? extends TreeNode>> getPaths() {
    return wrappedNode.getPaths();
  }

  @Override
  public ContextElement getContext() {
    return wrappedNode.getContext();
  }

  @Override
  public String toTreeString() {
    return wrappedNode.toTreeString();
  }

  @Override
  public void clean() {
    wrappedNode.clean();
    StatisticsManager.removePassThroughStatistics(context);
  }
}