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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.nodes;

import java.util.List;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.error.Mark;

/**
 * Base class for the two collection types {@link MappingNode mapping} and {@link SequenceNode
 * collection}.
 */
public abstract class CollectionNode extends Node {

  private DumperOptions.FlowStyle flowStyle;

  /**
   * Create
   *
   * @param tag - its tag
   * @param startMark - start
   * @param endMark - end
   * @param flowStyle - style
   */
  public CollectionNode(Tag tag, Mark startMark, Mark endMark, DumperOptions.FlowStyle flowStyle) {
    super(tag, startMark, endMark);
    setFlowStyle(flowStyle);
  }

  /**
   * Returns the elements in this sequence.
   *
   * @return Nodes in the specified order.
   */
  public abstract List getValue();

  /**
   * Serialization style of this collection.
   *
   * @return true for flow style, false for block style.
   */
  public DumperOptions.FlowStyle getFlowStyle() {
    return flowStyle;
  }

  /**
   * Setter
   *
   * @param flowStyle - flow style for collections
   */
  public void setFlowStyle(DumperOptions.FlowStyle flowStyle) {
    if (flowStyle == null) {
      throw new NullPointerException("Flow style must be provided.");
    }
    this.flowStyle = flowStyle;
  }

  /**
   * Setter
   *
   * @param endMark - end
   */
  public void setEndMark(Mark endMark) {
    this.endMark = endMark;
  }
}