org.apache.flink.table.expressions

Class ExpressionDefaultVisitor<T>

java.lang.Object

org.apache.flink.table.expressions.ExpressionDefaultVisitor<T>

All Implemented Interfaces:

ExpressionVisitor<T>

Direct Known Subclasses:

DeclarativeExpressionResolver, SqlAggFunctionVisitor

@Internal
public abstract class ExpressionDefaultVisitor<T>
extends Object
implements ExpressionVisitor<T>

Implementation of ExpressionVisitor that redirects all calls to defaultMethod(Expression).

Constructor Summary

Constructors

Constructor and Description
ExpressionDefaultVisitor()

Method Summary

Modifier and Type	Method and Description
protected abstract T	defaultMethod(Expression expression)
T	visit(CallExpression call)
T	visit(Expression other)
T	visit(FieldReferenceExpression fieldReference)
T	visit(NestedFieldReferenceExpression nestedFieldReference)
T	visit(TypeLiteralExpression typeLiteral)
T	visit(ValueLiteralExpression valueLiteral)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionDefaultVisitor

public ExpressionDefaultVisitor()

Method Detail

visit

public T visit(CallExpression call)

Specified by:

visit in interface ExpressionVisitor<T>

visit

public T visit(ValueLiteralExpression valueLiteral)

Specified by:

visit in interface ExpressionVisitor<T>

visit

public T visit(FieldReferenceExpression fieldReference)

Specified by:

visit in interface ExpressionVisitor<T>

visit

public T visit(TypeLiteralExpression typeLiteral)

Specified by:

visit in interface ExpressionVisitor<T>

visit

public T visit(Expression other)

Specified by:

visit in interface ExpressionVisitor<T>

visit

public T visit(NestedFieldReferenceExpression nestedFieldReference)

Specified by:

visit in interface ExpressionVisitor<T>

defaultMethod

protected abstract T defaultMethod(Expression expression)