[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-5024) MetadataContext#registerAttribute does not recognize inherited fields

[Hardy Ferentschik (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=45198#comment-45198 ] 

Hardy Ferentschik commented on HHH-5024:
----------------------------------------

Ok, in _org.hibernate.ejb.test.metagen.mappedsuperclass.idclass_ we have:

{code:title=AbstractAttribute.java|borderStyle=solid}}
@MappedSuperclass
public abstract class AbstractAttribute implements Serializable {
	protected String key;
	protected String value;

	public AbstractAttribute() {
		super();
	}

	public abstract String getOwner();

	@Column(name = "attribute_key")
	public String getKey() {
		return key;
	}

	public void setKey(String key) {
		this.key = key;
	}

	@Column(name = "attribute_value")
	public String getValue() {
		return value;
	}

	public void setValue(String value) {
		this.value = value;
	}
}
{code}

{code:title=AbstractAttribute_.java|borderStyle=solid}}
@StaticMetamodel(AbstractAttribute.class)
public abstract class AbstractAttribute_ {
        public static volatile SingularAttribute<AbstractAttribute, String> value;
        public static volatile SingularAttribute<AbstractAttribute, String> owner;
        public static volatile SingularAttribute<AbstractAttribute, String> key;
}
{code}

----

{code:title=ProductAttribute.java|borderStyle=solid}}
@Entity
@IdClass(value = ProductAttributeId.class)
public class ProductAttribute extends AbstractAttribute implements Serializable {
	private String owner;

	public ProductAttribute(String key, String value, String product) {
		this.key = key;
		this.value = value;
		this.owner = product;
	}

	public ProductAttribute() {
		super();
	}

	@Id
	@Column(name = "owner")
	public String getOwner() {
		return owner;
	}

	public void setOwner(String owner) {
		this.owner = owner;
	}

	@Id
	@Column(name = "attribute_key")
	public String getKey() {
		return key;
	}
}
{code}

{code:title=ProductAttribute_.java|borderStyle=solid}}
@StaticMetamodel(ProductAttribute.class)
public abstract class ProductAttribute_ extends org.hibernate.ejb.test.metagen.mappedsuperclass.idclass.AbstractAttribute_ {

        public static volatile SingularAttribute<ProductAttribute, String> owner;
        public static volatile SingularAttribute<ProductAttribute, String> key;

}
{code}

----

{code:title=AbstractAttributeId.java|borderStyle=solid}}
@MappedSuperclass
public abstract class AbstractAttributeId implements Serializable {
	protected String key;

	public String getKey() {
		return key;
	}

	public void setKey(String key) {
		this.key = key;
	}
}
{code}

{code:title=AbstractAttributeId_.java|borderStyle=solid}}
@StaticMetamodel(AbstractAttributeId.class)
public abstract class AbstractAttributeId_ {
        public static volatile SingularAttribute<AbstractAttributeId, String> key;
}
{code}

----

{code:title=ProductAttributeId.java|borderStyle=solid}}
public class ProductAttributeId extends AbstractAttributeId {
	private String owner;

	public String getOwner() {
		return owner;
	}

	public void setOwner(String owner) {
		this.owner = owner;
	}

	@Override
	public int hashCode() {
           ...
	}

	@Override
	public boolean equals(Object obj) {
           ...
	}
}
{code}

----

What do you think is wrong in the metamodel classes?



> MetadataContext#registerAttribute does not recognize inherited fields
> ---------------------------------------------------------------------
>
>                 Key: HHH-5024
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5024
>             Project: Hibernate ORM
>          Issue Type: Bug
>          Components: entity-manager, metamodel
>    Affects Versions: 3.5.0-CR-2, 3.5.1, 4.0.0.Final
>         Environment: Hibernate 3.5.0-CR-2, JPA Modelgen 1.0.0-CR-1
>            Reporter: Adrian Hummel
>            Assignee: Steve Ebersole
>             Fix For: 4.1.0
>
>         Attachments: bugreport.zip, hhh-5024.zip, hhh-5024.zip
>
>          Time Spent: 6.85h
>
> The embeddable class {{CustomerId}} (see attached ZIP) inherits from the base class {{AbstractIdentity}} (annotated with {{@MappedSuperclass}}). The metamodel classes for these two classes are correctly generated:
> {code:title=AbstractIdentity_.java|borderStyle=solid}
> import javax.persistence.metamodel.SingularAttribute;
> import javax.persistence.metamodel.StaticMetamodel;
> @StaticMetamodel(AbstractIdentity.class)
> public abstract class AbstractIdentity_ {
> public static volatile SingularAttribute<AbstractIdentity, String> id;
> }
> {code}
> and
> {code:title=CustomerId_.java|borderStyle=solid}
> import javax.persistence.metamodel.StaticMetamodel;
> @StaticMetamodel(CustomerId.class)
> public abstract class CustomerId_ extends AbstractIdentity_ {
> }
> {code}
> When building the entity manager factory, {{MetadataContext#registerAttribute}} (line 378) tries to resolve the field {{CustomerId_.id}} using {{Class#getDeclaredField}}. This results in a {{NoSuchFieldException}} because the field is declared in the super class {{AbstractIdentity_}}.
> Proposed solution: Since all field declarations in the metamodel are public, the {{Class#getField}} method should be used instead.

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