ConstructorQueryMappings (EclipseLink Core 4.0.2 API)

java.lang.Object
- org.eclipse.persistence.internal.jpa.jpql.ConstructorQueryMappings

```
public final class ConstructorQueryMappings
extends Object
```
This object scans a DatabaseQuery and checks if it's a constructor query. If it is one, then the fully qualified class name and the persistent fields will be available.

Since:

2.5

Version:

2.5

Author:

Pascal Filion

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getClassName()`	Returns the class name used to define the constructor expression.
`DatabaseQuery`	`getQuery()`	Returns the `DatabaseQuery` for which its JPQL query was scanned to check if it's constructor query and if so, to gather the information.
`boolean`	`isConstructorQuery()`	Determines whether the JPQL query is a constructor query, i.e.
`Iterable<DatabaseMapping>`	`mappings()`	Returns a non-`null` `Iterable` over the ordered list of `DatabaseMapping` objects that represents the parameter arguments defined in the constructor expression.

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

- Method Detail
  - getClassName
```
public String getClassName()
```
    Returns the class name used to define the constructor expression.
    
    Returns:
    
    Either the fully qualified class name used in the constructor expression or null if the query is not a constructor query
  - getQuery
```
public DatabaseQuery getQuery()
```
    Returns the DatabaseQuery for which its JPQL query was scanned to check if it's constructor query and if so, to gather the information.
    
    Returns:
    
    The DatabaseQuery that was scanned
  - isConstructorQuery
```
public boolean isConstructorQuery()
```
    Determines whether the JPQL query is a constructor query, i.e. the select expression is a constructor expression.
    Example: SELECT new test.example.Employee(e.name, e.id) FROM Employee e
    
    Returns:
    
    true if the SELECT clause has a single select item and it's a constructor expression; false otherwise
  - mappings
```
public Iterable<DatabaseMapping> mappings()
```
    Returns a non-null Iterable over the ordered list of DatabaseMapping objects that represents the parameter arguments defined in the constructor expression.
    
    Returns:
    
    The list contains the persistent fields that were passed to the constructor