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.

Version:

2.4.1

See Also:

ValueResolver

Author:

Pascal Filion

Since:

2.3

Constructor Summary

KeyResolver(Resolver parent)
Creates a new KeyResolver.

Method Summary

void	accept(ResolverVisitor visitor) Visits this Resolver by the given visitor.
protected IType	buildType() Resolves the IType of the property handled by this Resolver.
protected ITypeDeclaration	buildTypeDeclaration() Resolves the ITypeDeclaration of the property handled by this Resolver.
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

addChild, checkParent, getChild, getMapping, getParent, getParentManagedType, getParentMapping, getParentType, getParentTypeDeclaration, getProvider, getQuery, getType, getType, getType, getTypeDeclaration, getTypeHelper, getTypeRepository, isNullAllowed, setNullAllowed

Methods inherited from class java.lang.Object

clone, equals, finalize, 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

buildType

protected IType buildType()

Resolves the IType of the property handled by this Resolver.

Overrides:

buildType in class Resolver

Returns:

Either the IType that was resolved by this Resolver or the IType for IType.UNRESOLVABLE_TYPE if it could not be resolved

buildTypeDeclaration

protected ITypeDeclaration buildTypeDeclaration()

Resolves the ITypeDeclaration of the property handled by this Resolver.

Specified by:

buildTypeDeclaration in class Resolver

Returns:

Either the ITypeDeclaration that was resolved by this Resolver or the ITypeDeclaration for IType.UNRESOLVABLE_TYPE if it could not be resolved

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