AbstractGrammarValidator.NullExpressionVisitor (EclipseLink 2.7.15, API Reference)

java.lang.Object
- org.eclipse.persistence.jpa.jpql.parser.AbstractExpressionVisitor
- - org.eclipse.persistence.jpa.jpql.AbstractGrammarValidator.NullExpressionVisitor

All Implemented Interfaces:

ExpressionVisitor

Enclosing class:

AbstractGrammarValidator
```
protected static final class AbstractGrammarValidator.NullExpressionVisitor
extends AbstractExpressionVisitor
```
This visitor checks to see if the visited expression is NullExpression.

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  protected NullExpression expression
  The NullExpression if it is the Expression that was visited.
- Constructor Summary
  
  Constructors
  Modifier Constructor Description
  
  protected NullExpressionVisitor()
  Creates a new NullExpressionVisitor.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void visit(NullExpression expression)
  Visits the NullExpression expression.
  - Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpressionVisitor
    visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - expression
```
protected NullExpression expression
```
    The NullExpression if it is the Expression that was visited.
- Constructor Detail
  - NullExpressionVisitor
```
protected NullExpressionVisitor()
```
    Creates a new NullExpressionVisitor.
- Method Detail
  - visit
```
public void visit(NullExpression expression)
```
    Visits the NullExpression expression.
    
    Specified by:
    
    visit in interface ExpressionVisitor
    
    Overrides:
    
    visit in class AbstractExpressionVisitor
    
    Parameters:
    
    expression - The Expression to visit