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javax.persistence.criteria.Fetch - JPA interface

javax.persistence.criteria
Interface Fetch<Z,X>

Superinterfaces:
FetchParent<Z,X>
Represents a join-fetched association or attribute.
Since:
JPA 2.0
Attribute<?,?> getAttribute()
Return the metamodel attribute corresponding to the fetch join.
Return the metamodel attribute corresponding to the fetch join.
Returns:
metamodel attribute for the join
Since:
JPA 2.0
JoinType getJoinType()
Return the join type used in the fetch join.
Return the join type used in the fetch join.
Returns:
join type
Since:
JPA 2.0
FetchParent<?,Z> getParent()
Return the parent of the fetched item.
Return the parent of the fetched item.
Returns:
fetch parent
Since:
JPA 2.0
Fetch<X,Y> fetch(String attributeName)
Create a fetch join to the specified attribute using an inner join.
Create a fetch join to the specified attribute using an inner join.
Parameters:
attributeName - name of the attribute for the target of the join
Returns:
the resulting fetch join
Throws:
IllegalArgumentException - if attribute of the given name does not exist
Since:
JPA 2.0
Fetch<X,Y> fetch(String attributeName, JoinType jt)
Create a fetch join to the specified attribute using the given join type.
Create a fetch join to the specified attribute using the given join type.
Parameters:
attributeName - name of the attribute for the target of the join
jt - join type
Returns:
the resulting fetch join
Throws:
IllegalArgumentException - if attribute of the given name does not exist
Since:
JPA 2.0
Fetch<X,Y> fetch(PluralAttribute<?,?,Y> attribute)
Create a fetch join to the specified collection-valued attribute using an inner join.
Create a fetch join to the specified collection-valued attribute using an inner join.
Parameters:
attribute - target of the join
Returns:
the resulting join
Since:
JPA 2.0
Fetch<X,Y> fetch(SingularAttribute<?,Y> attribute)
Create a fetch join to the specified single-valued attribute using an inner join.
Create a fetch join to the specified single-valued attribute using an inner join.
Parameters:
attribute - target of the join
Returns:
the resulting fetch join
Since:
JPA 2.0
Fetch<X,Y> fetch(PluralAttribute<?,?,Y> attribute, JoinType jt)
Create a fetch join to the specified collection-valued attribute using the given join type.
Create a fetch join to the specified collection-valued attribute using the given join type.
Parameters:
attribute - target of the join
jt - join type
Returns:
the resulting join
Since:
JPA 2.0
Fetch<X,Y> fetch(SingularAttribute<?,Y> attribute, JoinType jt)
Create a fetch join to the specified single-valued attribute using the given join type.
Create a fetch join to the specified single-valued attribute using the given join type.
Parameters:
attribute - target of the join
jt - join type
Returns:
the resulting fetch join
Since:
JPA 2.0
Set<Fetch<X,?>> getFetches()
Return the fetch joins that have been made from this type.
Return the fetch joins that have been made from this type. Returns empty set if no fetch joins have been made from this type. Modifications to the set do not affect the query.
Returns:
fetch joins made from this type
Since:
JPA 2.0
This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
Object DB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.