spring TokenKind 源码
spring TokenKind 代码
文件路径：/spring-expression/src/main/java/org/springframework/expression/spel/standard/TokenKind.java
/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.expression.spel.standard;
/**
* Token Kinds.
*
* @author Andy Clement
* @since 3.0
*/
enum TokenKind {
// ordered by priority - operands first
LITERAL_INT,
LITERAL_LONG,
LITERAL_HEXINT,
LITERAL_HEXLONG,
LITERAL_STRING,
LITERAL_REAL,
LITERAL_REAL_FLOAT,
LPAREN("("),
RPAREN(")"),
COMMA(","),
IDENTIFIER,
COLON(":"),
HASH("#"),
RSQUARE("]"),
LSQUARE("["),
LCURLY("{"),
RCURLY("}"),
DOT("."),
PLUS("+"),
STAR("*"),
MINUS("-"),
SELECT_FIRST("^["),
SELECT_LAST("$["),
QMARK("?"),
PROJECT("!["),
DIV("/"),
GE(">="),
GT(">"),
LE("<="),
LT("<"),
EQ("=="),
NE("!="),
MOD("%"),
NOT("!"),
ASSIGN("="),
INSTANCEOF("instanceof"),
MATCHES("matches"),
BETWEEN("between"),
SELECT("?["),
POWER("^"),
ELVIS("?:"),
SAFE_NAVI("?."),
BEAN_REF("@"),
FACTORY_BEAN_REF("&"),
SYMBOLIC_OR("||"),
SYMBOLIC_AND("&&"),
INC("++"),
DEC("--");
final char[] tokenChars;
private final boolean hasPayload; // is there more to this token than simply the kind
private TokenKind(String tokenString) {
this.tokenChars = tokenString.toCharArray();
this.hasPayload = (this.tokenChars.length == 0);
}
private TokenKind() {
this("");
}
@Override
public String toString() {
return (name() + (this.tokenChars.length !=0 ? "(" + new String(this.tokenChars) +")" : ""));
}
public boolean hasPayload() {
return this.hasPayload;
}
public int getLength() {
return this.tokenChars.length;
}
}
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