com.facebook.presto.spi.relation

Class DefaultRowExpressionTraversalVisitor<C>

java.lang.Object

com.facebook.presto.spi.relation.DefaultRowExpressionTraversalVisitor<C>

All Implemented Interfaces:

RowExpressionVisitor<Void,C>

public class DefaultRowExpressionTraversalVisitor<C>
extends Object
implements RowExpressionVisitor<Void,C>

The default visitor serves as a template for "consumer-like" tree traversal. is the consumer to apply customized actions on the visiting RowExpression.

Constructor Summary

Constructors

Constructor and Description
DefaultRowExpressionTraversalVisitor()

Method Summary

Modifier and Type	Method and Description
Void	visitCall(CallExpression call, C context)
Void	visitConstant(ConstantExpression literal, C context)
Void	visitInputReference(InputReferenceExpression input, C context)
Void	visitLambda(LambdaDefinitionExpression lambda, C context)
Void	visitSpecialForm(SpecialFormExpression specialForm, C context)
Void	visitVariableReference(VariableReferenceExpression reference, C context)

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultRowExpressionTraversalVisitor

public DefaultRowExpressionTraversalVisitor()

Method Detail

visitInputReference

public Void visitInputReference(InputReferenceExpression input,
                                C context)

Specified by:

visitInputReference in interface RowExpressionVisitor<Void,C>

visitCall

public Void visitCall(CallExpression call,
                      C context)

Specified by:

visitCall in interface RowExpressionVisitor<Void,C>

visitConstant

public Void visitConstant(ConstantExpression literal,
                          C context)

Specified by:

visitConstant in interface RowExpressionVisitor<Void,C>

visitLambda

public Void visitLambda(LambdaDefinitionExpression lambda,
                        C context)

Specified by:

visitLambda in interface RowExpressionVisitor<Void,C>

visitVariableReference

public Void visitVariableReference(VariableReferenceExpression reference,
                                   C context)

Specified by:

visitVariableReference in interface RowExpressionVisitor<Void,C>

visitSpecialForm

public Void visitSpecialForm(SpecialFormExpression specialForm,
                             C context)

Specified by:

visitSpecialForm in interface RowExpressionVisitor<Void,C>