org.apache.shardingsphere.core.parse.antlr.extractor.impl.dml

Class ExpressionExtractor

java.lang.Object

org.apache.shardingsphere.core.parse.antlr.extractor.impl.dml.ExpressionExtractor

public final class ExpressionExtractor
extends Object

Expression extractor.

Author:

duhongjun

Constructor Summary

Constructors

Constructor and Description
ExpressionExtractor()

Method Summary

Modifier and Type	Method and Description
com.google.common.base.Optional<? extends ExpressionSegment>	extract(Map<org.antlr.v4.runtime.ParserRuleContext,Integer> placeholderIndexes, org.antlr.v4.runtime.ParserRuleContext expressionNode) Extract expression.
CommonExpressionSegment	extractCommonExpressionSegment(Map<org.antlr.v4.runtime.ParserRuleContext,Integer> placeholderIndexes, org.antlr.v4.runtime.ParserRuleContext expressionNode) Extract common expression segment.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionExtractor

public ExpressionExtractor()

Method Detail

extract

public com.google.common.base.Optional<? extends ExpressionSegment> extract(Map<org.antlr.v4.runtime.ParserRuleContext,Integer> placeholderIndexes,
                                                                            org.antlr.v4.runtime.ParserRuleContext expressionNode)

Extract expression.

Parameters:

placeholderIndexes - placeholder index

expressionNode - expression node

Returns:

expression segment

extractCommonExpressionSegment

public CommonExpressionSegment extractCommonExpressionSegment(Map<org.antlr.v4.runtime.ParserRuleContext,Integer> placeholderIndexes,
                                                              org.antlr.v4.runtime.ParserRuleContext expressionNode)

Extract common expression segment.

Parameters:

placeholderIndexes - placeholder index

expressionNode - expression node

Returns:

common expression segment