1 /*
2 * Copyright 2004 Ronald Blaschke.
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.rblasch.convert.type;
17
18 /***
19 * @author Ronald Blaschke
20 */
21 public class NullType extends AbstractType {
22 static NullType valueOf(final String s) throws UnknownTypeException {
23 if ("null".equals(s)) {
24 return getInstance();
25 } else {
26 throw new UnknownTypeException(s + " is not the null type");
27 }
28 }
29
30 private static NullType instance = new NullType();
31
32 static NullType getInstance() {
33 return instance;
34 }
35
36 public String getName() {
37 return "null";
38 }
39 }