/*
 * Copyright 2002-2017 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
 *
 *      http://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
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package org.springframework.expression.spel.standard;

import org.springframework.lang.Nullable;

Holder for a kind of token, the associated data and its position in the input data stream (start/end).
Author:Andy Clement
Since:3.0
/** * Holder for a kind of token, the associated data and its position in the input data * stream (start/end). * * @author Andy Clement * @since 3.0 */
class Token { TokenKind kind; @Nullable String data; int startPos; // index of first character int endPos; // index of char after the last character
Constructor for use when there is no particular data for the token (e.g. TRUE or '+')
Params:
  • startPos – the exact start
  • endPos – the index to the last character
/** * Constructor for use when there is no particular data for the token * (e.g. TRUE or '+') * @param startPos the exact start * @param endPos the index to the last character */
Token(TokenKind tokenKind, int startPos, int endPos) { this.kind = tokenKind; this.startPos = startPos; this.endPos = endPos; } Token(TokenKind tokenKind, char[] tokenData, int startPos, int endPos) { this(tokenKind, startPos, endPos); this.data = new String(tokenData); } public TokenKind getKind() { return this.kind; } public boolean isIdentifier() { return (this.kind == TokenKind.IDENTIFIER); } public boolean isNumericRelationalOperator() { return (this.kind == TokenKind.GT || this.kind == TokenKind.GE || this.kind == TokenKind.LT || this.kind == TokenKind.LE || this.kind==TokenKind.EQ || this.kind==TokenKind.NE); } public String stringValue() { return (this.data != null ? this.data : ""); } public Token asInstanceOfToken() { return new Token(TokenKind.INSTANCEOF, this.startPos, this.endPos); } public Token asMatchesToken() { return new Token(TokenKind.MATCHES, this.startPos, this.endPos); } public Token asBetweenToken() { return new Token(TokenKind.BETWEEN, this.startPos, this.endPos); } @Override public String toString() { StringBuilder s = new StringBuilder(); s.append("[").append(this.kind.toString()); if (this.kind.hasPayload()) { s.append(":").append(this.data); } s.append("]"); s.append("(").append(this.startPos).append(",").append(this.endPos).append(")"); return s.toString(); } }