java.lang.Object
- step.core.ql.OQLBaseListener

All Implemented Interfaces:

org.antlr.v4.runtime.tree.ParseTreeListener, OQLListener
```
public class OQLBaseListener
extends java.lang.Object
implements OQLListener
```
This class provides an empty implementation of OQLListener, which can be extended to create a listener which only needs to handle a subset of the available methods.

Constructor Summary

Constructors
Constructor Description

OQLBaseListener()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`enterAndExpr(OQLParser.AndExprContext ctx)`	Enter a parse tree produced by the `andExpr` labeled alternative in `OQLParser.expr()`.
`void`	`enterAtomExpr(OQLParser.AtomExprContext ctx)`	Enter a parse tree produced by the `atomExpr` labeled alternative in `OQLParser.expr()`.
`void`	`enterEqualityExpr(OQLParser.EqualityExprContext ctx)`	Enter a parse tree produced by the `equalityExpr` labeled alternative in `OQLParser.expr()`.
`void`	`enterEveryRule(org.antlr.v4.runtime.ParserRuleContext ctx)`
`void`	`enterNonQuotedStringAtom(OQLParser.NonQuotedStringAtomContext ctx)`	Enter a parse tree produced by the `nonQuotedStringAtom` labeled alternative in `OQLParser.atom()`.
`void`	`enterNotExpr(OQLParser.NotExprContext ctx)`	Enter a parse tree produced by the `notExpr` labeled alternative in `OQLParser.expr()`.
`void`	`enterOrExpr(OQLParser.OrExprContext ctx)`	Enter a parse tree produced by the `orExpr` labeled alternative in `OQLParser.expr()`.
`void`	`enterParExpr(OQLParser.ParExprContext ctx)`	Enter a parse tree produced by the `parExpr` labeled alternative in `OQLParser.atom()`.
`void`	`enterParse(OQLParser.ParseContext ctx)`	Enter a parse tree produced by `OQLParser.parse()`.
`void`	`enterStringAtom(OQLParser.StringAtomContext ctx)`	Enter a parse tree produced by the `stringAtom` labeled alternative in `OQLParser.atom()`.
`void`	`exitAndExpr(OQLParser.AndExprContext ctx)`	Exit a parse tree produced by the `andExpr` labeled alternative in `OQLParser.expr()`.
`void`	`exitAtomExpr(OQLParser.AtomExprContext ctx)`	Exit a parse tree produced by the `atomExpr` labeled alternative in `OQLParser.expr()`.
`void`	`exitEqualityExpr(OQLParser.EqualityExprContext ctx)`	Exit a parse tree produced by the `equalityExpr` labeled alternative in `OQLParser.expr()`.
`void`	`exitEveryRule(org.antlr.v4.runtime.ParserRuleContext ctx)`
`void`	`exitNonQuotedStringAtom(OQLParser.NonQuotedStringAtomContext ctx)`	Exit a parse tree produced by the `nonQuotedStringAtom` labeled alternative in `OQLParser.atom()`.
`void`	`exitNotExpr(OQLParser.NotExprContext ctx)`	Exit a parse tree produced by the `notExpr` labeled alternative in `OQLParser.expr()`.
`void`	`exitOrExpr(OQLParser.OrExprContext ctx)`	Exit a parse tree produced by the `orExpr` labeled alternative in `OQLParser.expr()`.
`void`	`exitParExpr(OQLParser.ParExprContext ctx)`	Exit a parse tree produced by the `parExpr` labeled alternative in `OQLParser.atom()`.
`void`	`exitParse(OQLParser.ParseContext ctx)`	Exit a parse tree produced by `OQLParser.parse()`.
`void`	`exitStringAtom(OQLParser.StringAtomContext ctx)`	Exit a parse tree produced by the `stringAtom` labeled alternative in `OQLParser.atom()`.
`void`	`visitErrorNode(org.antlr.v4.runtime.tree.ErrorNode node)`
`void`	`visitTerminal(org.antlr.v4.runtime.tree.TerminalNode node)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - OQLBaseListener
```
public OQLBaseListener()
```
- Method Detail
  - enterParse
```
public void enterParse(OQLParser.ParseContext ctx)
```
    Enter a parse tree produced by OQLParser.parse().
    The default implementation does nothing.
    
    Specified by:
    
    enterParse in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitParse
```
public void exitParse(OQLParser.ParseContext ctx)
```
    Exit a parse tree produced by OQLParser.parse().
    The default implementation does nothing.
    
    Specified by:
    
    exitParse in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterNotExpr
```
public void enterNotExpr(OQLParser.NotExprContext ctx)
```
    Enter a parse tree produced by the notExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    enterNotExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitNotExpr
```
public void exitNotExpr(OQLParser.NotExprContext ctx)
```
    Exit a parse tree produced by the notExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    exitNotExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterAtomExpr
```
public void enterAtomExpr(OQLParser.AtomExprContext ctx)
```
    Enter a parse tree produced by the atomExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    enterAtomExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitAtomExpr
```
public void exitAtomExpr(OQLParser.AtomExprContext ctx)
```
    Exit a parse tree produced by the atomExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    exitAtomExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterOrExpr
```
public void enterOrExpr(OQLParser.OrExprContext ctx)
```
    Enter a parse tree produced by the orExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    enterOrExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitOrExpr
```
public void exitOrExpr(OQLParser.OrExprContext ctx)
```
    Exit a parse tree produced by the orExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    exitOrExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterEqualityExpr
```
public void enterEqualityExpr(OQLParser.EqualityExprContext ctx)
```
    Enter a parse tree produced by the equalityExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    enterEqualityExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitEqualityExpr
```
public void exitEqualityExpr(OQLParser.EqualityExprContext ctx)
```
    Exit a parse tree produced by the equalityExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    exitEqualityExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterAndExpr
```
public void enterAndExpr(OQLParser.AndExprContext ctx)
```
    Enter a parse tree produced by the andExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    enterAndExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitAndExpr
```
public void exitAndExpr(OQLParser.AndExprContext ctx)
```
    Exit a parse tree produced by the andExpr labeled alternative in OQLParser.expr().
    The default implementation does nothing.
    
    Specified by:
    
    exitAndExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterParExpr
```
public void enterParExpr(OQLParser.ParExprContext ctx)
```
    Enter a parse tree produced by the parExpr labeled alternative in OQLParser.atom().
    The default implementation does nothing.
    
    Specified by:
    
    enterParExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitParExpr
```
public void exitParExpr(OQLParser.ParExprContext ctx)
```
    Exit a parse tree produced by the parExpr labeled alternative in OQLParser.atom().
    The default implementation does nothing.
    
    Specified by:
    
    exitParExpr in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterNonQuotedStringAtom
```
public void enterNonQuotedStringAtom(OQLParser.NonQuotedStringAtomContext ctx)
```
    Enter a parse tree produced by the nonQuotedStringAtom labeled alternative in OQLParser.atom().
    The default implementation does nothing.
    
    Specified by:
    
    enterNonQuotedStringAtom in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitNonQuotedStringAtom
```
public void exitNonQuotedStringAtom(OQLParser.NonQuotedStringAtomContext ctx)
```
    Exit a parse tree produced by the nonQuotedStringAtom labeled alternative in OQLParser.atom().
    The default implementation does nothing.
    
    Specified by:
    
    exitNonQuotedStringAtom in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterStringAtom
```
public void enterStringAtom(OQLParser.StringAtomContext ctx)
```
    Enter a parse tree produced by the stringAtom labeled alternative in OQLParser.atom().
    The default implementation does nothing.
    
    Specified by:
    
    enterStringAtom in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - exitStringAtom
```
public void exitStringAtom(OQLParser.StringAtomContext ctx)
```
    Exit a parse tree produced by the stringAtom labeled alternative in OQLParser.atom().
    The default implementation does nothing.
    
    Specified by:
    
    exitStringAtom in interface OQLListener
    
    Parameters:
    
    ctx - the parse tree
  - enterEveryRule
```
public void enterEveryRule(org.antlr.v4.runtime.ParserRuleContext ctx)
```
    The default implementation does nothing.
    
    Specified by:
    
    enterEveryRule in interface org.antlr.v4.runtime.tree.ParseTreeListener
  - exitEveryRule
```
public void exitEveryRule(org.antlr.v4.runtime.ParserRuleContext ctx)
```
    The default implementation does nothing.
    
    Specified by:
    
    exitEveryRule in interface org.antlr.v4.runtime.tree.ParseTreeListener
  - visitTerminal
```
public void visitTerminal(org.antlr.v4.runtime.tree.TerminalNode node)
```
    The default implementation does nothing.
    
    Specified by:
    
    visitTerminal in interface org.antlr.v4.runtime.tree.ParseTreeListener
  - visitErrorNode
```
public void visitErrorNode(org.antlr.v4.runtime.tree.ErrorNode node)
```
    The default implementation does nothing.
    
    Specified by:
    
    visitErrorNode in interface org.antlr.v4.runtime.tree.ParseTreeListener

Class OQLBaseListener

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

OQLBaseListener

Method Detail

enterParse

exitParse

enterNotExpr

exitNotExpr

enterAtomExpr

exitAtomExpr

enterOrExpr

exitOrExpr

enterEqualityExpr

exitEqualityExpr

enterAndExpr

exitAndExpr

enterParExpr

exitParExpr

enterNonQuotedStringAtom

exitNonQuotedStringAtom

enterStringAtom

exitStringAtom

enterEveryRule

exitEveryRule

visitTerminal

visitErrorNode