i was running a code in which there's a dependency @PersistenceContext and field private EntityManager em; both of which cannot be resolved to a type, what is the meaning of this error and how can i fix it?
the code is here:
package org.jboss.tools.examples.util;
import
java.util.logging.Logger;`
import javax.enterprise.context.RequestScoped;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.faces.context.FacesContext;
/**
* This class uses CDI to alias
Java EE resources, such as the persistence context, to CDI beans
*
* <p>
* Example injection on a managed bean field:
* </p>
*
* <pre>
* @Inject
* private EntityManager em;
* </pre>
*/
public class Resources {
// use @SuppressWarnings to tell IDE to ignore warnings about field not being referenced directly
@SuppressWarnings("unused")
@Produces
@PersistenceContext
private EntityManager em;
@Produces
public Logger produceLog(InjectionPoint injectionPoint) {
return Logger.getLogger(injectionPoint.getMember().getDeclaringClass().getName());
}
@Produces
@RequestScoped
public FacesContext produceFacesContext() {
return FacesContext.getCurrentInstance();
}
}
