org.eclipse.persistence.jpa.jpql

Class KeyResolver

java.lang.Object

org.eclipse.persistence.jpa.jpql.Resolver

org.eclipse.persistence.jpa.jpql.KeyResolver

public class KeyResolver
extends Resolver

This Resolver is responsible to return the map key, which means that for identification variables referring to an instance of an association or collection represented as a Map, the identification variable is of the abstract schema type of the map key.

Since:

2.3

Version:

2.4.1

Author:

Pascal Filion

See Also:

ValueResolver

Constructor Summary

Constructors

Constructor and Description
KeyResolver(Resolver parent) Creates a new KeyResolver.

Method Summary

Modifier and Type	Method and Description
void	accept(ResolverVisitor visitor) Visits this Resolver by the given visitor.
IManagedType	getManagedType() Returns the IManagedType associated with the field handled by this Resolver.
java.lang.String	toString()

Methods inherited from class org.eclipse.persistence.jpa.jpql.Resolver

getMapping, getParent, getType, isNullAllowed, setNullAllowed

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

KeyResolver

public KeyResolver(Resolver parent)

Creates a new KeyResolver.

Parameters:

parent - The parent Resolver, which is never null

Method Detail

accept

public void accept(ResolverVisitor visitor)

Visits this Resolver by the given visitor.

Specified by:

accept in class Resolver

Parameters:

visitor - The visitor to visit this object

getManagedType

public IManagedType getManagedType()

Returns the IManagedType associated with the field handled by this Resolver. If this Resolver does not handle a field that has a IManagedType, then null should be returned.

For example: "SELECT e FROM Employee e", the Resolver for e would be returning the IManagedType for Employee.

Overrides:

getManagedType in class Resolver

Returns:

Either the IManagedType, if it could be resolved; null otherwise

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object