JPQLQueryContext.QueryExpressionVisitor (EclipseLink 2.7.15, API Reference)

java.lang.Object
- org.eclipse.persistence.jpa.jpql.parser.AnonymousExpressionVisitor
- - org.eclipse.persistence.jpa.jpql.parser.AbstractTraverseParentVisitor
  - - org.eclipse.persistence.jpa.jpql.tools.JPQLQueryContext.QueryExpressionVisitor

All Implemented Interfaces:

ExpressionVisitor

Enclosing class:

JPQLQueryContext
```
protected static class JPQLQueryContext.QueryExpressionVisitor
extends AbstractTraverseParentVisitor
```
This visitor is responsible to retrieve the Expression that is the beginning of a query. For a subquery, it will retrieve SimpleSelectStatement and for a top-level query, it will retrieve JPQLExpression. The search goes through the parent hierarchy.

Field Summary

Fields
Modifier and Type Field Description

protected Expression expression
The Expression that is the beginning of a query.

Constructor Summary

Constructors
Modifier Constructor Description

protected QueryExpressionVisitor()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`visit(JPQLExpression expression)`	Visits the `JPQLExpression` expression.
`void`	`visit(SimpleSelectStatement expression)`	Visits the `SimpleSelectStatement` expression.

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractTraverseParentVisitor
visit

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AnonymousExpressionVisitor
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 Expression expression
```
    The Expression that is the beginning of a query.
- Constructor Detail
  - QueryExpressionVisitor
```
protected QueryExpressionVisitor()
```
- Method Detail
  - visit
```
public void visit(JPQLExpression expression)
```
    Visits the JPQLExpression expression.
    
    Specified by:
    
    visit in interface ExpressionVisitor
    
    Overrides:
    
    visit in class AbstractTraverseParentVisitor
    
    Parameters:
    
    expression - The Expression to visit
  - visit
```
public void visit(SimpleSelectStatement expression)
```
    Visits the SimpleSelectStatement expression.
    
    Specified by:
    
    visit in interface ExpressionVisitor
    
    Overrides:
    
    visit in class AnonymousExpressionVisitor
    
    Parameters:
    
    expression - The Expression to visit