Package org.apache.iotdb.db.mpp.plan.expression.visitor

Class ExpressionVisitor<R,C>

java.lang.Object

org.apache.iotdb.db.mpp.plan.expression.visitor.ExpressionVisitor<R,C>

Type Parameters:

R - The return type of the visit operation.

C - The context information during visiting.

Direct Known Subclasses:

ColumnTransformerVisitor, IntermediateLayerVisitor, OldIntermediateLayerVisitor

public abstract class ExpressionVisitor<R,C>
extends java.lang.Object

This class provides a visitor of Expression, which can be extended to create a visitor which only needs to handle a subset of the available methods.

Constructor Summary

Constructors

Constructor	Description
ExpressionVisitor()

Method Summary

Modifier and Type	Method	Description
R	process(Expression expression, C context)
R	visitBinaryExpression(BinaryExpression binaryExpression, C context)
R	visitConstantOperand(ConstantOperand constantOperand, C context)
abstract R	visitExpression(Expression expression, C context)
R	visitFunctionExpression(FunctionExpression functionExpression, C context)
R	visitTernaryExpression(TernaryExpression ternaryExpression, C context)
R	visitTimeSeriesOperand(TimeSeriesOperand timeSeriesOperand, C context)
R	visitTimeStampOperand(TimestampOperand timestampOperand, C context)
R	visitUnaryExpression(UnaryExpression unaryExpression, C context)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionVisitor

public ExpressionVisitor()

Method Detail

process

public R process(Expression expression,
                 C context)

visitExpression

public abstract R visitExpression(Expression expression,
                                  C context)

visitUnaryExpression

public R visitUnaryExpression(UnaryExpression unaryExpression,
                              C context)

visitBinaryExpression

public R visitBinaryExpression(BinaryExpression binaryExpression,
                               C context)

visitTernaryExpression

public R visitTernaryExpression(TernaryExpression ternaryExpression,
                                C context)

visitFunctionExpression

public R visitFunctionExpression(FunctionExpression functionExpression,
                                 C context)

visitTimeStampOperand

public R visitTimeStampOperand(TimestampOperand timestampOperand,
                               C context)

visitTimeSeriesOperand

public R visitTimeSeriesOperand(TimeSeriesOperand timeSeriesOperand,
                                C context)

visitConstantOperand

public R visitConstantOperand(ConstantOperand constantOperand,
                              C context)