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 package org.springframework.expression.spel.standard;
17 
18 /**
19  * @author Andy Clement
20  * @since 3.0
21  */
22 enum TokenKind {
23 	// ordered by priority - operands first
24 	LITERAL_INT, LITERAL_LONG, LITERAL_HEXINT, LITERAL_HEXLONG, LITERAL_STRING, LITERAL_REAL, LITERAL_REAL_FLOAT,
25 	LPAREN("("), RPAREN(")"), COMMA(","), IDENTIFIER,
26 	COLON(":"),HASH("#"),RSQUARE("]"), LSQUARE("["),
27 	LCURLY("{"),RCURLY("}"),
28 	DOT("."), PLUS("+"), STAR("*"),  MINUS("-"), SELECT_FIRST("^["), SELECT_LAST("$["), QMARK("?"), PROJECT("!["),
29 	DIV("/"), GE(">="), GT(">"), LE("<="), LT("<"), EQ("=="), NE("!="),
30 	MOD("%"), NOT("!"), ASSIGN("="), INSTANCEOF("instanceof"), MATCHES("matches"), BETWEEN("between"),
31 	SELECT("?["),   POWER("^"),
32 	ELVIS("?:"), SAFE_NAVI("?."), BEAN_REF("@")
33 	;
34 
35 	char[] tokenChars;
36 	private boolean hasPayload; // is there more to this token than simply the kind
37 
TokenKind(String tokenString)38 	private TokenKind(String tokenString) {
39 		tokenChars = tokenString.toCharArray();
40 		hasPayload = tokenChars.length==0;
41 	}
42 
TokenKind()43 	private TokenKind() {
44 		this("");
45 	}
46 
toString()47 	public String toString() {
48 		return this.name()+(tokenChars.length!=0?"("+new String(tokenChars)+")":"");
49 	}
50 
hasPayload()51 	public boolean hasPayload() {
52 		return hasPayload;
53 	}
54 
getLength()55 	public int getLength() {
56 		return tokenChars.length;
57 	}
58 }