InternalConcatExpressionBNF (EclipseLink 3.0.4-RC1, API Reference)

java.lang.Object
- org.eclipse.persistence.jpa.jpql.parser.JPQLQueryBNF
- - org.eclipse.persistence.jpa.jpql.parser.InternalConcatExpressionBNF

```
public final class InternalConcatExpressionBNF
extends JPQLQueryBNF
```
The query BNF for the COUNT expression's encapsulated expressions.
JPA 1.0:
BNF: expression ::= CONCAT(string_primary, string_primary)

JPA 2.0:
BNF: expression ::= CONCAT(string_primary, string_primary {, string_primary}*)

JPA 2.1:
BNF: expression ::= CONCAT(string_expression, string_expression {, string_expression}*)

Version:

2.5

Author:

Pascal Filion

Since:

2.3

Field Summary

Fields
Modifier and Type Field Description

static String ID
The unique identifier of this InternalConcatExpressionBNF.

Constructor Summary

Constructors
Constructor Description

InternalConcatExpressionBNF()
Creates a new InternalConcatExpressionBNF.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`initialize()`	Initializes this BNF by registering child `JPQLQueryBNFs` and `ExpressionFactories`.

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.JPQLQueryBNF
children, getExpressionFactory, getExpressionFactoryIds, getExpressionRegistry, getFallbackBNFId, getFallbackExpressionFactoryId, getId, getIdentifiers, handleAggregate, handleCollection, handlesNestedArray, handleSubExpression, hasChild, hasIdentifier, isCompound, nonCompoundChildren, registerChild, registerExpressionFactory, setCompound, setFallbackBNFId, setFallbackExpressionFactoryId, setHandleAggregate, setHandleCollection, setHandleNestedArray, setHandleSubExpression, toString, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - ID
```
public static final String ID
```
    The unique identifier of this InternalConcatExpressionBNF.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - InternalConcatExpressionBNF
```
public InternalConcatExpressionBNF()
```
    Creates a new InternalConcatExpressionBNF.
- Method Detail
  - initialize
```
protected void initialize()
```
    Description copied from class: JPQLQueryBNF
    
    Initializes this BNF by registering child JPQLQueryBNFs and ExpressionFactories.
    
    Overrides:
    
    initialize in class JPQLQueryBNF