/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.samoa.learners.classifiers.trees;

import org.apache.samoa.core.ContentEvent;

/**
 * Abstract class to represent ContentEvent to control Local Statistic Processor.
 * 
 * @author Arinto Murdopo
 * 
 */
public abstract class ControlContentEvent implements ContentEvent {

  /**
	 * 
	 */
  private static final long serialVersionUID = 5837375639629708363L;

  protected final long learningNodeId;

  public ControlContentEvent() {
    this.learningNodeId = -1;
  }

  ControlContentEvent(long id) {
    this.learningNodeId = id;
  }

  @Override
  public final String getKey() {
    return null;
  }

  @Override
  public void setKey(String str) {
    // Do nothing
  }

  @Override
  public boolean isLastEvent() {
    return false;
  }

  final long getLearningNodeId() {
    return this.learningNodeId;
  }

  abstract LocStatControl getType();

  static enum LocStatControl {
    COMPUTE, DELETE
  }
}