/*
 * Copyright (c) 2018, 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.snakeyaml.engine.v2.nodes;

import java.util.Objects;

/**
 * Stores one key value pair used in a map.
 */
public final class NodeTuple {

  private final Node keyNode;
  private final Node valueNode;

  public NodeTuple(Node keyNode, Node valueNode) {
    Objects.requireNonNull(keyNode, "keyNode must be provided.");
    Objects.requireNonNull(valueNode, "value Node must be provided");
    this.keyNode = keyNode;
    this.valueNode = valueNode;
  }

  /**
   * Key node.
   *
   * @return the node used as key
   */
  public Node getKeyNode() {
    return keyNode;
  }

  /**
   * Value node.
   *
   * @return node used as value
   */
  public Node getValueNode() {
    return valueNode;
  }

  @Override
  public String toString() {
    return "<NodeTuple keyNode=" + keyNode + "; valueNode=" + valueNode + ">";
  }
}
