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1   /**
2    * Copyright (c) 2008-2012, 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  package org.yaml.snakeyaml.nodes;
17  
18  /**
19   * Stores one key value pair used in a map.
20   */
21  public final class NodeTuple {
22  
23      private Node keyNode;
24      private Node valueNode;
25  
26      public NodeTuple(Node keyNode, Node valueNode) {
27          if (keyNode == null || valueNode == null) {
28              throw new NullPointerException("Nodes must be provided.");
29          }
30          this.keyNode = keyNode;
31          this.valueNode = valueNode;
32      }
33  
34      /**
35       * Key node.
36       */
37      final public Node getKeyNode() {
38          return keyNode;
39      }
40  
41      /**
42       * Value node.
43       * 
44       * @return value
45       */
46      final public Node getValueNode() {
47          return valueNode;
48      }
49  
50      @Override
51      public String toString() {
52          return "<NodeTuple keyNode=" + keyNode.toString() + "; valueNode=" + valueNode.toString()
53                  + ">";
54      }
55  }