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/**
 * Copyright (c) 2008, SnakeYAML
 *
 * 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.yaml.snakeyaml.events;

import org.yaml.snakeyaml.error.Mark;

/**
 * Base class for all events that mark the beginning of a node.
 */
public abstract class NodeEvent extends Event {

  private final String anchor;

  public NodeEvent(String anchor, Mark startMark, Mark endMark) {
    super(startMark, endMark);
    this.anchor = anchor;
  }

  /**
   * Node anchor by which this node might later be referenced by a {@link AliasEvent}.
   * 
   * Note that {@link AliasEvent}s are by it self NodeEvents and use this property to
   * indicate the referenced anchor.
   *
   * @return Anchor of this node or null if no anchor is defined.
   */
  public String getAnchor() {
    return this.anchor;
  }

  @Override
  protected String getArguments() {
    return "anchor=" + anchor;
  }
}