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1   /**
2    * Copyright (c) 2008-2011, http://www.snakeyaml.org
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.yaml.snakeyaml.nodes;
18  
19  /**
20   * Stores one key value pair used in a map.
21   */
22  public final class NodeTuple {
23  
24      private final Node keyNode;
25      private final Node valueNode;
26  
27      public NodeTuple(Node keyNode, Node valueNode) {
28          if (keyNode == null || valueNode == null) {
29              throw new NullPointerException("Nodes must be provided.");
30          }
31          this.keyNode = keyNode;
32          this.valueNode = valueNode;
33      }
34  
35      /**
36       * Key node.
37       */
38      final public Node getKeyNode() {
39          return keyNode;
40      }
41  
42      /**
43       * Value node.
44       * 
45       * @return value
46       */
47      final public Node getValueNode() {
48          return valueNode;
49      }
50  
51      @Override
52      public String toString() {
53          return "<NodeTuple keyNode=" + keyNode.toString() + "; valueNode=" + valueNode.toString()
54                  + ">";
55      }
56  }