Unknown abstract schema type
Basiert auf der Antwort von axtavt, ist es fast sicher ein naming-problem zwischen Notebean und NoteBean. Gibt es eine bestimmte Konvention zu Folgen hier, einfach nur normal CamelCase?
Ich glaube, ich habe aktualisiert die @NamedQuery-annotation in der entity und bin mit denen von der Steuerung, und die Namen sehen zu entsprechen, doch bin ich immer Empfang, die gleiche Fehlermeldung über das schema, dessen ich kann nicht viel Informationen über die.
JPA controller:
package net.bounceme.dur.nntp.controller;
import java.util.*;
import java.util.logging.Logger;
import javax.mail.Message;
import javax.persistence.*;
import javax.swing.DefaultListModel;
import net.bounceme.dur.nntp.model.NoteBean;
public class NotesController {
private static final long serialVersionUID = 1L;
private static final Logger LOG = Logger.getLogger(NotesController.class.getName());
private Message message;
private List<NoteBean> notes = new ArrayList<NoteBean>();
private DefaultListModel defaultListModel = new DefaultListModel();
private EntityManagerFactory emf;
private EntityManager em;
private String PERSISTENCE_UNIT_NAME = "nntpPU";
public NotesController() {
emf = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
em = emf.createEntityManager();
LOG.info("entity manager made???" + em.isOpen());
populateList();
}
private void populateList() {
LOG.info("open?" + em.isOpen());
em.getTransaction().begin();
LOG.info("trying to populate.....");
//Query q = em.createQuery("SELECT n FROM NoteBean n WHERE n.id = :id");
Query q = em.createNamedQuery("NoteBean.findAll");
LOG.info(q.toString());
List results = q.getResultList();
em.getTransaction().commit();
setNotes(results);
DefaultListModel dlm = new DefaultListModel();
for (NoteBean n : getNotes()) {
dlm.addElement(n);
}
setDefaultListModel(dlm);
}
public Message getMessage() {
return message;
}
public void addNote(NoteBean noteBean) {
LOG.info(noteBean.toString());
em.getTransaction().begin();
em.persist(noteBean);
em.getTransaction().commit();
populateList();
}
public void setMessage(Message message) {
this.message = message;
}
private List<NoteBean> getNotes() {
return notes;
}
private void setNotes(List<NoteBean> notes) {
this.notes = notes;
}
public DefaultListModel getDefaultListModel() {
return defaultListModel;
}
public void setDefaultListModel(DefaultListModel defaultListModel) {
this.defaultListModel = defaultListModel;
}
}Person:
package net.bounceme.dur.nntp.model;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.*;
import javax.xml.bind.annotation.XmlRootElement;
@Entity
@Table(name = "NOTEBEAN", catalog = "nntp", schema = "")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "NoteBean.findAll", query = "SELECT n FROM NoteBean n"),
@NamedQuery(name = "NoteBean.findById", query = "SELECT n FROM Notebean n WHERE n.id = :id"),
@NamedQuery(name = "NoteBean.findByStamp", query = "SELECT n FROM Notebean n WHERE n.stamp = :stamp"),
@NamedQuery(name = "NoteBean.findByNote", query = "SELECT n FROM Notebean n WHERE n.note = :note")
})
public class NoteBean implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Basic(optional = false)
@Column(name = "ID", nullable = false)
private Long id;
@Column(name = "STAMP")
@Temporal(TemporalType.DATE)
private Date stamp;
@Column(name = "NOTE", length = 255)
private String note;
public NoteBean() {
}
public NoteBean(Long id) {
this.id = id;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Date getStamp() {
return stamp;
}
public void setStamp(Date stamp) {
this.stamp = stamp;
}
public String getNote() {
return note;
}
public void setNote(String note) {
this.note = note;
}
@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
//TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof NoteBean)) {
return false;
}
NoteBean other = (NoteBean) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
@Override
public String toString() {
return "net.bounceme.dur.nntp.model.Notebean[ id=" + id + " ]";
}
}run-time error:
init:
Deleting: /home/thufir/NetBeansProjects/SwingNNTP/build/built-jar.properties
deps-jar:
Updating property file: /home/thufir/NetBeansProjects/SwingNNTP/build/built-jar.properties
Compiling 2 source files to /home/thufir/NetBeansProjects/SwingNNTP/build/classes
warning: [options] bootstrap class path not set in conjunction with -source 1.5
Note: /home/thufir/NetBeansProjects/SwingNNTP/src/net/bounceme/dur/nntp/controller/NotesController.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 warning
compile:
run:
May 03, 2012 7:23:05 AM net.bounceme.dur.nntp.PropertiesReader getProps
INFO: NNTP.loadMessages...
May 03, 2012 7:23:06 AM net.bounceme.dur.nntp.controller.MessagesEnum <init>
INFO: starting controller..
[TopLink Info]: 2012.05.03 07:23:10.319--ServerSession(10922033)--TopLink, version: Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))
Exception in thread "AWT-EventQueue-0" Local Exception Stack:
Exception [TOPLINK-8034] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EJBQLException
Exception Description: Error compiling the query [NoteBean.findByNote: SELECT n FROM Notebean n WHERE n.note = :note]. Unknown abstract schema type [Notebean].
at oracle.toplink.essentials.exceptions.EJBQLException.unknownAbstractSchemaType(EJBQLException.java:494)
at oracle.toplink.essentials.internal.parsing.ParseTreeContext.classForSchemaName(ParseTreeContext.java:163)
at oracle.toplink.essentials.internal.parsing.SelectNode.getClassOfFirstVariable(SelectNode.java:366)
at oracle.toplink.essentials.internal.parsing.SelectNode.getReferenceClass(SelectNode.java:354)
at oracle.toplink.essentials.internal.parsing.ParseTree.getReferenceClass(ParseTree.java:463)
at oracle.toplink.essentials.internal.parsing.ParseTree.adjustReferenceClassForQuery(ParseTree.java:103)
at oracle.toplink.essentials.internal.parsing.EJBQLParseTree.populateReadQueryInternal(EJBQLParseTree.java:127)
at oracle.toplink.essentials.internal.parsing.EJBQLParseTree.populateQuery(EJBQLParseTree.java:108)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:219)
at oracle.toplink.essentials.queryframework.EJBQLPlaceHolderQuery.processEjbQLQuery(EJBQLPlaceHolderQuery.java:111)
at oracle.toplink.essentials.internal.sessions.AbstractSession.processEJBQLQueries(AbstractSession.java:2059)
at oracle.toplink.essentials.internal.sessions.AbstractSession.processEJBQLQueries(AbstractSession.java:2046)
at oracle.toplink.essentials.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:724)
at oracle.toplink.essentials.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:604)
at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:280)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:229)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:93)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:126)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:120)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:91)
at net.bounceme.dur.nntp.controller.NotesController.<init>(NotesController.java:23)
at net.bounceme.dur.nntp.gui.Detail.<init>(Detail.java:20)
at net.bounceme.dur.nntp.gui.NewFrame.initComponents(NewFrame.java:30)
at net.bounceme.dur.nntp.gui.NewFrame.<init>(NewFrame.java:17)
at net.bounceme.dur.nntp.gui.NewFrame$2.run(NewFrame.java:62)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
at java.awt.EventQueue.access$000(EventQueue.java:101)
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
BUILD SUCCESSFUL (total time: 10 seconds)Nur für Referenz, mysql Ausgabe in der Konsole:
mysql> describe nntp.NOTEBEAN;
+-------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+--------------+------+-----+---------+-------+
| ID | bigint(20) | NO | PRI | NULL | |
| STAMP | date | YES | | NULL | |
| NOTE | varchar(255) | YES | | NULL | |
+-------+--------------+------+-----+---------+-------+
3 rows in set (0.00 sec)
mysql>
mysql> select * from nntp.NOTEBEAN;
Empty set (0.04 sec)
mysql> Schreibe einen Kommentar
Du musst angemeldet sein, um einen Kommentar abzugeben.
Namen Ihrer entity-Klasse, (und, so -, Standard-logische name der Entität, für die Verwendung in Abfragen) ist
NoteBean, in der Erwägung, dass stacktrace beschwert sich überNotebean.Also sollten Sie
NoteBeanstattNotebeanin Ihren Abfragen:Unknown abstract schema type [Notebean].mit der Abfrage. Dass@TableAnmerkung ist noch mehr vermute, nach dem Lesen, was Sie wies darauf hin, über NoteBean versus Notebean. Dasselbe Ergebnis, jedoch.Notebean. Sollte man es in allen benannten Abfragen, auch wenn Sie nie verwenden, da die syntax von named queries aktiviert ist beim Start.