com.alibaba.qlexpress4.runtime.operator

Class OperatorManager

java.lang.Object

com.alibaba.qlexpress4.runtime.operator.OperatorManager

All Implemented Interfaces:

OperatorFactory, ParserOperatorManager

public class OperatorManager
extends java.lang.Object
implements OperatorFactory, ParserOperatorManager

Author:

bingo

Nested Class Summary

Nested classes/interfaces inherited from interface com.alibaba.qlexpress4.aparser.ParserOperatorManager

ParserOperatorManager.OpType

Constructor Summary

Constructors

Constructor and Description
OperatorManager()

Method Summary

Modifier and Type	Method and Description
boolean	addBinaryOperator(java.lang.String operatorName, CustomBinaryOperator customBinaryOperator, int priority)
boolean	addKeyWordAlias(java.lang.String lexeme, java.lang.String keyWord)
boolean	addOperatorAlias(java.lang.String lexeme, java.lang.String operator)
java.lang.Integer	getAlias(java.lang.String lexeme) get alias token type of lexeme
BinaryOperator	getBinaryOperator(java.lang.String operatorLexeme)
UnaryOperator	getPrefixUnaryOperator(java.lang.String operatorLexeme) like --1 ++1 !true ~1 ^1
UnaryOperator	getSuffixUnaryOperator(java.lang.String operatorLexeme) like 1-- 1++
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
boolean	replaceDefaultOperator(java.lang.String operatorName, CustomBinaryOperator customBinaryOperator)

Methods inherited from class java.lang.Object

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

Constructor Detail

OperatorManager

public OperatorManager()

Method Detail

addBinaryOperator

public boolean addBinaryOperator(java.lang.String operatorName,
                                 CustomBinaryOperator customBinaryOperator,
                                 int priority)

Parameters:

operatorName -

customBinaryOperator -

priority - QLPrecedences

Returns:

replaceDefaultOperator

public boolean replaceDefaultOperator(java.lang.String operatorName,
                                      CustomBinaryOperator customBinaryOperator)

getBinaryOperator

public BinaryOperator getBinaryOperator(java.lang.String operatorLexeme)

Specified by:

getBinaryOperator in interface OperatorFactory

Parameters:

operatorLexeme - like +, =, *, /

Returns:

binary operator

getPrefixUnaryOperator

public UnaryOperator getPrefixUnaryOperator(java.lang.String operatorLexeme)

like --1 ++1 !true ~1 ^1

Specified by:

getPrefixUnaryOperator in interface OperatorFactory

Parameters:

operatorLexeme - ++, --

Returns:

prefix unary operator

getSuffixUnaryOperator

public UnaryOperator getSuffixUnaryOperator(java.lang.String operatorLexeme)

like 1-- 1++

Specified by:

getSuffixUnaryOperator in interface OperatorFactory

Parameters:

operatorLexeme - ++, --

Returns:

suffix unary operator

isOpType

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

Description copied from interface: ParserOperatorManager

determine whether lexeme is opType or not

Specified by:

isOpType in interface ParserOperatorManager

Parameters:

lexeme - lexeme

opType - type of operator

Returns:

true if lexeme is opType

precedence

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

Description copied from interface: ParserOperatorManager

get binary operator precedence

Specified by:

precedence in interface ParserOperatorManager

Parameters:

lexeme - lexeme

Returns:

null if lexeme not a operator

getAlias

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

Description copied from interface: ParserOperatorManager

get alias token type of lexeme

Specified by:

getAlias in interface ParserOperatorManager

Returns:

alias token type

addKeyWordAlias

public boolean addKeyWordAlias(java.lang.String lexeme,
                               java.lang.String keyWord)

addOperatorAlias

public boolean addOperatorAlias(java.lang.String lexeme,
                                java.lang.String operator)