Package software.amazon.smithy.rulesengine.language.syntax.expressions

Interface ExpressionVisitor<R>

Type Parameters:

R - Return type of the visitor.

All Known Implementing Classes:

ExpressionVisitor.Default, RuleEvaluator, TraversingVisitor

public interface ExpressionVisitor<R>

Expression visitor pattern.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	ExpressionVisitor.Default<R>

Method Summary

Modifier and Type	Method	Description
R	visitBoolEquals(Expression left, Expression right)	Does a boolean equality check.
R	visitGetAttr(GetAttr getAttr)	Visits a GetAttr function.
R	visitIsSet(Expression fn)	Visits an isSet function.
R	visitLibraryFunction(FunctionDefinition fn, java.util.List<Expression> args)	Visits a library function.
R	visitLiteral(Literal literal)	Visits a literal.
R	visitNot(Expression not)	Visits a not function.
R	visitRef(Reference reference)	Visits a reference.
R	visitStringEquals(Expression left, Expression right)	Does a string equality check.

Method Detail

visitLiteral

R visitLiteral(Literal literal)

Visits a literal.

Parameters:

literal - the literal to visit.

Returns:

the value from the visitor.

visitRef

R visitRef(Reference reference)

Visits a reference.

Parameters:

reference - the reference to visit.

Returns:

the value from the visitor.

visitGetAttr

R visitGetAttr(GetAttr getAttr)

Visits a GetAttr function.

Parameters:

getAttr - the GetAttr function to visit.

Returns:

the value from the visitor.

visitIsSet

R visitIsSet(Expression fn)

Visits an isSet function.

Parameters:

fn - the isSet function to visit.

Returns:

the value from the visitor.

visitNot

R visitNot(Expression not)

Visits a not function.

Parameters:

not - the not function to visit.

Returns:

the value from the visitor.

visitBoolEquals

R visitBoolEquals(Expression left,
                  Expression right)

Does a boolean equality check.

Parameters:

left - the first value to compare.

right - the second value to compare.

Returns:

the value from the visitor.

visitStringEquals

R visitStringEquals(Expression left,
                    Expression right)

Does a string equality check.

Parameters:

left - the first value to compare.

right - the second value to compare.

Returns:

the value from the visitor.

visitLibraryFunction

R visitLibraryFunction(FunctionDefinition fn,
                       java.util.List<Expression> args)

Visits a library function.

Parameters:

fn - the library function to visit.

args - the arguments to the function being visited.

Returns:

the value from the visitor.