com.dangdang.ddframe.rdb.sharding.parsing.lexer

类 LexerEngine

java.lang.Object

com.dangdang.ddframe.rdb.sharding.parsing.lexer.LexerEngine

public final class LexerEngine
extends Object

Lexical analysis engine.

作者:

zhangliang

构造器概要

构造器

构造器和说明
LexerEngine()

方法概要

方法

限定符和类型	方法和说明
void	accept(TokenType tokenType) Assert current token type should equals input token and go to next token type.
boolean	equalAny(TokenType... tokenTypes) Adjust current token equals one of input tokens or not.
Token	getCurrentToken() Get current token.
String	getInput() Get input string.
void	nextToken() Analyse next token.
void	skipAll(TokenType... tokenTypes) Skip all input tokens.
boolean	skipIfEqual(TokenType... tokenTypes) Skip current token if equals one of input tokens.
String	skipParentheses(SQLStatement sqlStatement) skip all tokens that inside parentheses.
void	skipUntil(TokenType... tokenTypes) Skip until one of input tokens.
void	unsupportedIfEqual(TokenType... tokenTypes) Throw unsupported exception if current token equals one of input tokens.
void	unsupportedIfNotSkip(TokenType... tokenTypes) Throw unsupported exception if current token not equals one of input tokens.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

LexerEngine

public LexerEngine()

方法详细资料

getInput

public String getInput()

Get input string.

返回:

inputted string

nextToken

public void nextToken()

Analyse next token.

getCurrentToken

public Token getCurrentToken()

Get current token.

返回:

current token

skipParentheses

public String skipParentheses(SQLStatement sqlStatement)

skip all tokens that inside parentheses.

参数:

sqlStatement - SQL statement

返回:

skipped string

accept

public void accept(TokenType tokenType)

Assert current token type should equals input token and go to next token type.

参数:

tokenType - token type

equalAny

public boolean equalAny(TokenType... tokenTypes)

Adjust current token equals one of input tokens or not.

参数:

tokenTypes - to be adjusted token types

返回:

current token equals one of input tokens or not

skipIfEqual

public boolean skipIfEqual(TokenType... tokenTypes)

Skip current token if equals one of input tokens.

参数:

tokenTypes - to be adjusted token types

返回:

skipped current token or not

skipAll

public void skipAll(TokenType... tokenTypes)

Skip all input tokens.

参数:

tokenTypes - to be skipped token types

skipUntil

public void skipUntil(TokenType... tokenTypes)

Skip until one of input tokens.

参数:

tokenTypes - to be skipped untiled token types

unsupportedIfEqual

public void unsupportedIfEqual(TokenType... tokenTypes)

Throw unsupported exception if current token equals one of input tokens.

参数:

tokenTypes - to be adjusted token types

unsupportedIfNotSkip

public void unsupportedIfNotSkip(TokenType... tokenTypes)

Throw unsupported exception if current token not equals one of input tokens.

参数:

tokenTypes - to be adjusted token types