121 words
createNamedQuery(name, resultClass) - JPA EntityManager's method
Methodjavax.persistence.EntityManager
TypedQuery<T> createNamedQuery(
String name,
Class<T> resultClass
)
Create an instance of
TypedQuery for executing a
Java Persistence query language named query.
The select list of the query must contain only a single
item, which must be assignable to the type specified by
the resultClass argument.- Parameters:
name- the name of a query defined in metadataresultClass- the type of the query result
- Returns:
- the new query instance
- Throws:
IllegalArgumentException- if a query has not been defined with the given name or if the query string is found to be invalid or if the query result is found to not be assignable to the specified 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.
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.
Which JPA is Faster?
See a comparison of Hibernate, EclipseLink, OpenJPA, DataNucleus, MySQL, PostgreSQL, Derby, HSQLDB, DB4O by Versant, H2 Database, SQLite and ObjectDB
in the JPA Benchmark.
