Package dev.frostlake.executor.expressions

Class AstPrinterVisitor

java.lang.Object

dev.frostlake.executor.expressions.AstPrinterVisitor

All Implemented Interfaces:

ExpressionVisitor<String>

public class AstPrinterVisitor
extends Object
implements ExpressionVisitor<String>

Renders an Expression AST into a compact, canonical S-expression string.

Purpose: stable, human-readable assertions in parser/builder tests and old-vs-new parser diffing during the migration to an ANTLR-driven expression AST. The rendered form is deliberately independent of each node's own toString() so it can stay stable as the nodes evolve.

Constructor Summary

Constructors

Constructor	Description
AstPrinterVisitor()

Method Summary

Modifier and Type	Method	Description
static String	print(Expression expression)	Convenience: render an expression to its canonical string.
String	visitArrayAccess(ArrayAccessExpression expr)
String	visitBetween(BetweenExpression expr)
String	visitBinaryOperation(BinaryOperationExpression expr)
String	visitBindVariable(BindVariableExpression expr)
String	visitCaseExpression(CaseExpression expr)
String	visitCast(CastExpression expr)
String	visitColumnReference(ColumnReferenceExpression expr)
String	visitDefaultMarker(DefaultMarkerExpression expr)
String	visitExecuteImmediate(ExecuteImmediateExpression expr)
String	visitFunctionCall(FunctionCallExpression expr)
String	visitIn(InExpression expr)
String	visitInterval(IntervalExpression expr)
String	visitIsNull(IsNullExpression expr)
String	visitJsonArray(JsonArrayExpression expr)
String	visitJsonObject(JsonObjectExpression expr)
String	visitLambda(LambdaExpression expr)
String	visitLikeAnyAll(LikeAnyAllExpression expr)
String	visitLiteral(LiteralExpression expr)
String	visitObjectAccess(ObjectAccessExpression expr)
String	visitQuantifiedComparison(QuantifiedComparisonExpression expr)
String	visitSessionVar(SessionVarExpression expr)
String	visitSpread(SpreadExpression expr)
String	visitSubquery(SubqueryExpression expr)
String	visitSystemStreamHasData(SystemStreamHasDataExpression expr)
String	visitSystemUserTaskCancel(SystemUserTaskCancelExpression expr)
String	visitTupleIn(TupleInExpression expr)
String	visitUnaryOperation(UnaryOperationExpression expr)
String	visitWindowFunction(WindowFunctionExpression expr)

Methods inherited from class java.lang.Object

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

Constructor Details

AstPrinterVisitor

public AstPrinterVisitor()

Method Details

print

public static String print(Expression expression)

Convenience: render an expression to its canonical string.

visitDefaultMarker

public String visitDefaultMarker(DefaultMarkerExpression expr)

Specified by:

visitDefaultMarker in interface ExpressionVisitor<String>

visitLiteral

public String visitLiteral(LiteralExpression expr)

Specified by:

visitLiteral in interface ExpressionVisitor<String>

visitColumnReference

public String visitColumnReference(ColumnReferenceExpression expr)

Specified by:

visitColumnReference in interface ExpressionVisitor<String>

visitBinaryOperation

public String visitBinaryOperation(BinaryOperationExpression expr)

Specified by:

visitBinaryOperation in interface ExpressionVisitor<String>

visitUnaryOperation

public String visitUnaryOperation(UnaryOperationExpression expr)

Specified by:

visitUnaryOperation in interface ExpressionVisitor<String>

visitIsNull

public String visitIsNull(IsNullExpression expr)

Specified by:

visitIsNull in interface ExpressionVisitor<String>

visitLambda

public String visitLambda(LambdaExpression expr)

Specified by:

visitLambda in interface ExpressionVisitor<String>

visitFunctionCall

public String visitFunctionCall(FunctionCallExpression expr)

Specified by:

visitFunctionCall in interface ExpressionVisitor<String>

visitCaseExpression

public String visitCaseExpression(CaseExpression expr)

Specified by:

visitCaseExpression in interface ExpressionVisitor<String>

visitCast

public String visitCast(CastExpression expr)

Specified by:

visitCast in interface ExpressionVisitor<String>

visitObjectAccess

public String visitObjectAccess(ObjectAccessExpression expr)

Specified by:

visitObjectAccess in interface ExpressionVisitor<String>

visitArrayAccess

public String visitArrayAccess(ArrayAccessExpression expr)

Specified by:

visitArrayAccess in interface ExpressionVisitor<String>

visitSubquery

public String visitSubquery(SubqueryExpression expr)

Specified by:

visitSubquery in interface ExpressionVisitor<String>

visitExecuteImmediate

public String visitExecuteImmediate(ExecuteImmediateExpression expr)

Specified by:

visitExecuteImmediate in interface ExpressionVisitor<String>

visitJsonObject

public String visitJsonObject(JsonObjectExpression expr)

Specified by:

visitJsonObject in interface ExpressionVisitor<String>

visitJsonArray

public String visitJsonArray(JsonArrayExpression expr)

Specified by:

visitJsonArray in interface ExpressionVisitor<String>

visitBetween

public String visitBetween(BetweenExpression expr)

Specified by:

visitBetween in interface ExpressionVisitor<String>

visitLikeAnyAll

public String visitLikeAnyAll(LikeAnyAllExpression expr)

Specified by:

visitLikeAnyAll in interface ExpressionVisitor<String>

visitIn

public String visitIn(InExpression expr)

Specified by:

visitIn in interface ExpressionVisitor<String>

visitTupleIn

public String visitTupleIn(TupleInExpression expr)

Specified by:

visitTupleIn in interface ExpressionVisitor<String>

visitQuantifiedComparison

public String visitQuantifiedComparison(QuantifiedComparisonExpression expr)

Specified by:

visitQuantifiedComparison in interface ExpressionVisitor<String>

visitInterval

public String visitInterval(IntervalExpression expr)

Specified by:

visitInterval in interface ExpressionVisitor<String>

visitSessionVar

public String visitSessionVar(SessionVarExpression expr)

Specified by:

visitSessionVar in interface ExpressionVisitor<String>

visitBindVariable

public String visitBindVariable(BindVariableExpression expr)

Specified by:

visitBindVariable in interface ExpressionVisitor<String>

visitSystemStreamHasData

public String visitSystemStreamHasData(SystemStreamHasDataExpression expr)

Specified by:

visitSystemStreamHasData in interface ExpressionVisitor<String>

visitSystemUserTaskCancel

public String visitSystemUserTaskCancel(SystemUserTaskCancelExpression expr)

Specified by:

visitSystemUserTaskCancel in interface ExpressionVisitor<String>

visitWindowFunction

public String visitWindowFunction(WindowFunctionExpression expr)

Specified by:

visitWindowFunction in interface ExpressionVisitor<String>

visitSpread

public String visitSpread(SpreadExpression expr)

Specified by:

visitSpread in interface ExpressionVisitor<String>