com.aliyun.odps.sqa.commandapi.exception

Class CommandErrorStrategy

java.lang.Object

org.antlr.v4.runtime.DefaultErrorStrategy

com.aliyun.odps.sqa.commandapi.exception.CommandErrorStrategy

All Implemented Interfaces:

org.antlr.v4.runtime.ANTLRErrorStrategy

public class CommandErrorStrategy
extends org.antlr.v4.runtime.DefaultErrorStrategy

自定义ANTLR的错误处理机制 避免无意义的错误恢复

Constructor Summary

Constructors

Constructor and Description
CommandErrorStrategy()

Method Summary

Modifier and Type	Method and Description
void	recover(org.antlr.v4.runtime.Parser recognizer, org.antlr.v4.runtime.RecognitionException e) 不从异常e中恢复, 而是用RuntimeException包装,这样就不会被规则函数的catch捕获
org.antlr.v4.runtime.Token	recoverInline(org.antlr.v4.runtime.Parser recognizer) 确保不会试图执行行内恢复, 如果语法分析器成功进行了恢复,就不会抛出一个异常
void	sync(org.antlr.v4.runtime.Parser recognizer) 确保不会试图从子规则的问题中恢复

Methods inherited from class org.antlr.v4.runtime.DefaultErrorStrategy

inErrorRecoveryMode, reportError, reportMatch, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

CommandErrorStrategy

public CommandErrorStrategy()

Method Detail

recover

public void recover(org.antlr.v4.runtime.Parser recognizer,
                    org.antlr.v4.runtime.RecognitionException e)

不从异常e中恢复, 而是用RuntimeException包装,这样就不会被规则函数的catch捕获

Specified by:

recover in interface org.antlr.v4.runtime.ANTLRErrorStrategy

Overrides:

recover in class org.antlr.v4.runtime.DefaultErrorStrategy

Parameters:

recognizer -

e -

recoverInline

public org.antlr.v4.runtime.Token recoverInline(org.antlr.v4.runtime.Parser recognizer)
                                         throws org.antlr.v4.runtime.RecognitionException

确保不会试图执行行内恢复, 如果语法分析器成功进行了恢复,就不会抛出一个异常

Specified by:

recoverInline in interface org.antlr.v4.runtime.ANTLRErrorStrategy

Overrides:

recoverInline in class org.antlr.v4.runtime.DefaultErrorStrategy

Parameters:

recognizer -

Returns:

Throws:

org.antlr.v4.runtime.RecognitionException

sync

public void sync(org.antlr.v4.runtime.Parser recognizer)

确保不会试图从子规则的问题中恢复

Specified by:

sync in interface org.antlr.v4.runtime.ANTLRErrorStrategy

Overrides:

sync in class org.antlr.v4.runtime.DefaultErrorStrategy

Parameters:

recognizer -