com.alibaba.qlexpress4.aparser

Interface ParserOperatorManager

All Known Implementing Classes:

OperatorManager

public interface ParserOperatorManager

Author: DQinYuan

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	ParserOperatorManager.OpType

Method Summary

Modifier and Type	Method and Description
java.lang.Integer	getAlias(java.lang.String lexeme) get alias token type of lexeme
boolean	isOpType(java.lang.String lexeme, ParserOperatorManager.OpType opType) determine whether lexeme is opType or not
java.lang.Integer	precedence(java.lang.String lexeme) get binary operator precedence

Method Detail

isOpType

boolean isOpType(java.lang.String lexeme,
                 ParserOperatorManager.OpType opType)

determine whether lexeme is opType or not

Parameters:

lexeme - lexeme

opType - type of operator

Returns:

true if lexeme is opType

precedence

java.lang.Integer precedence(java.lang.String lexeme)

get binary operator precedence

Parameters:

lexeme - lexeme

Returns:

null if lexeme not a operator

getAlias

java.lang.Integer getAlias(java.lang.String lexeme)

get alias token type of lexeme

Parameters:

lexeme -

Returns:

alias token type