ExpressionDefaultVisitor (Flink : 2.0-SNAPSHOT API)

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 Description

ExpressionDefaultVisitor()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	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)