1 /*
2  * Copyright 2002-2009 the original author or authors.
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.springframework.expression.spel.ast;
18 
19 import org.springframework.expression.TypedValue;
20 
21 /**
22  * @author Andy Clement
23  * @since 3.0
24  */
25 public class NullLiteral extends Literal {
26 
NullLiteral(int pos)27 	public NullLiteral(int pos) {
28 		super(null,pos);
29 	}
30 
31 	@Override
getLiteralValue()32 	public TypedValue getLiteralValue() {
33 		return TypedValue.NULL;
34 	}
35 
36 	@Override
toString()37 	public String toString() {
38 		return "null";
39 	}
40 
41 }
42