io.rapidpro.expressions.evaluator

Class ExpressionVisitorImpl

java.lang.Object

org.antlr.v4.runtime.tree.AbstractParseTreeVisitor<T>

io.rapidpro.expressions.ExcellentBaseVisitor<Object>

io.rapidpro.expressions.evaluator.ExpressionVisitorImpl

All Implemented Interfaces:

ExcellentVisitor<Object>, org.antlr.v4.runtime.tree.ParseTreeVisitor<Object>

public class ExpressionVisitorImpl
extends ExcellentBaseVisitor<Object>

Visitor for our expression trees

Constructor Summary

Constructors

Constructor and Description
ExpressionVisitorImpl(FunctionManager functions, EvaluationContext context)

Method Summary

Modifier and Type	Method and Description
Object	visitAdditionOrSubtractionExpression(ExcellentParser.AdditionOrSubtractionExpressionContext ctx) expression: expression (PLUS | MINUS) expression
Object	visitComparisonExpression(ExcellentParser.ComparisonExpressionContext ctx) expression: expression (LTE | LT | GTE | GT) expression
Object	visitConcatenation(ExcellentParser.ConcatenationContext ctx) expression: expression AMPERSAND expression
Object	visitContextReference(ExcellentParser.ContextReferenceContext ctx) expression: NAME
Object	visitDecimalLiteral(ExcellentParser.DecimalLiteralContext ctx) expression: DECIMAL
Object	visitEqualityExpression(ExcellentParser.EqualityExpressionContext ctx) expression: expression (EQ | NEQ) expression
Object	visitExponentExpression(ExcellentParser.ExponentExpressionContext ctx) expression: expression EXPONENT expression
Object	visitFalse(ExcellentParser.FalseContext ctx) expression: FALSE
Object	visitFunctionCall(ExcellentParser.FunctionCallContext ctx) expression : fnname LPAREN parameters?
Object	visitFunctionParameters(ExcellentParser.FunctionParametersContext ctx) parameters : expression (COMMA expression)*
Object	visitMultiplicationOrDivisionExpression(ExcellentParser.MultiplicationOrDivisionExpressionContext ctx) expression: expression (TIMES | DIVIDE) expression
Object	visitNegation(ExcellentParser.NegationContext ctx) expression: MINUS expression
Object	visitParentheses(ExcellentParser.ParenthesesContext ctx) expression: LPAREN expression RPAREN
Object	visitParse(ExcellentParser.ParseContext ctx) Visit a parse tree produced by ExcellentParser.parse().
Object	visitStringLiteral(ExcellentParser.StringLiteralContext ctx) expression: STRING
Object	visitTrue(ExcellentParser.TrueContext ctx) expression: TRUE

Methods inherited from class io.rapidpro.expressions.ExcellentBaseVisitor

visitFnname

Methods inherited from class org.antlr.v4.runtime.tree.AbstractParseTreeVisitor

aggregateResult, defaultResult, shouldVisitNextChild, visit, visitChildren, visitErrorNode, visitTerminal

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.antlr.v4.runtime.tree.ParseTreeVisitor

visit, visitChildren, visitErrorNode, visitTerminal

Constructor Detail

ExpressionVisitorImpl

public ExpressionVisitorImpl(FunctionManager functions,
                             EvaluationContext context)

Method Detail

visitParse

public Object visitParse(ExcellentParser.ParseContext ctx)

Description copied from class: ExcellentBaseVisitor

Visit a parse tree produced by ExcellentParser.parse().

The default implementation returns the result of calling AbstractParseTreeVisitor.visitChildren(org.antlr.v4.runtime.tree.RuleNode) on ctx.

Specified by:

visitParse in interface ExcellentVisitor<Object>

Overrides:

visitParse in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitFunctionCall

public Object visitFunctionCall(ExcellentParser.FunctionCallContext ctx)

expression : fnname LPAREN parameters? RPAREN

Specified by:

visitFunctionCall in interface ExcellentVisitor<Object>

Overrides:

visitFunctionCall in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitFunctionParameters

public Object visitFunctionParameters(ExcellentParser.FunctionParametersContext ctx)

parameters : expression (COMMA expression)*

Specified by:

visitFunctionParameters in interface ExcellentVisitor<Object>

Overrides:

visitFunctionParameters in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitNegation

public Object visitNegation(ExcellentParser.NegationContext ctx)

expression: MINUS expression

Specified by:

visitNegation in interface ExcellentVisitor<Object>

Overrides:

visitNegation in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitExponentExpression

public Object visitExponentExpression(ExcellentParser.ExponentExpressionContext ctx)

expression: expression EXPONENT expression

Specified by:

visitExponentExpression in interface ExcellentVisitor<Object>

Overrides:

visitExponentExpression in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitMultiplicationOrDivisionExpression

public Object visitMultiplicationOrDivisionExpression(ExcellentParser.MultiplicationOrDivisionExpressionContext ctx)

expression: expression (TIMES | DIVIDE) expression

Specified by:

visitMultiplicationOrDivisionExpression in interface ExcellentVisitor<Object>

Overrides:

visitMultiplicationOrDivisionExpression in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitAdditionOrSubtractionExpression

public Object visitAdditionOrSubtractionExpression(ExcellentParser.AdditionOrSubtractionExpressionContext ctx)

expression: expression (PLUS | MINUS) expression

Specified by:

visitAdditionOrSubtractionExpression in interface ExcellentVisitor<Object>

Overrides:

visitAdditionOrSubtractionExpression in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitComparisonExpression

public Object visitComparisonExpression(ExcellentParser.ComparisonExpressionContext ctx)

expression: expression (LTE | LT | GTE | GT) expression

Specified by:

visitComparisonExpression in interface ExcellentVisitor<Object>

Overrides:

visitComparisonExpression in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitEqualityExpression

public Object visitEqualityExpression(ExcellentParser.EqualityExpressionContext ctx)

expression: expression (EQ | NEQ) expression

Specified by:

visitEqualityExpression in interface ExcellentVisitor<Object>

Overrides:

visitEqualityExpression in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitConcatenation

public Object visitConcatenation(ExcellentParser.ConcatenationContext ctx)

expression: expression AMPERSAND expression

Specified by:

visitConcatenation in interface ExcellentVisitor<Object>

Overrides:

visitConcatenation in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitStringLiteral

public Object visitStringLiteral(ExcellentParser.StringLiteralContext ctx)

expression: STRING

Specified by:

visitStringLiteral in interface ExcellentVisitor<Object>

Overrides:

visitStringLiteral in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitDecimalLiteral

public Object visitDecimalLiteral(ExcellentParser.DecimalLiteralContext ctx)

expression: DECIMAL

Specified by:

visitDecimalLiteral in interface ExcellentVisitor<Object>

Overrides:

visitDecimalLiteral in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitTrue

public Object visitTrue(ExcellentParser.TrueContext ctx)

expression: TRUE

Specified by:

visitTrue in interface ExcellentVisitor<Object>

Overrides:

visitTrue in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitFalse

public Object visitFalse(ExcellentParser.FalseContext ctx)

expression: FALSE

Specified by:

visitFalse in interface ExcellentVisitor<Object>

Overrides:

visitFalse in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitContextReference

public Object visitContextReference(ExcellentParser.ContextReferenceContext ctx)

expression: NAME

Specified by:

visitContextReference in interface ExcellentVisitor<Object>

Overrides:

visitContextReference in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result

visitParentheses

public Object visitParentheses(ExcellentParser.ParenthesesContext ctx)

expression: LPAREN expression RPAREN

Specified by:

visitParentheses in interface ExcellentVisitor<Object>

Overrides:

visitParentheses in class ExcellentBaseVisitor<Object>

Parameters:

ctx - the parse tree

Returns:

the visitor result