7
Basierend auf der Antwort von axtavt ist dies fast sicher ein Benennungsproblem zwischen Notebean und NoteBean. Gibt es hier eine bestimmte Konvention, nur normales CamelCase?Unbekannter abstrakter Schematyp
Ich glaube, ich habe die @ NamedQuery-Annotation in der Entität aktualisiert und verwende diese vom Controller, und die Namen stimmen überein, doch ich erhalte immer noch den gleichen Fehler über das Schema, was ich kann ' t erhalten viele Informationen über.
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;
}
}
Einheit:
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 + " ]";
}
}
Laufzeitfehler:
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 als Referenz, mysql Konsolausgabe:
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>
ich Ihre Logik mögen, aber ich bekomme immer noch 'Unbekannt abstrakten Schematyp [Notebean] .' mit dieser Abfrage. Diese '@ Table'-Annotation ist noch verdächtiger, nachdem Sie gelesen haben, was Sie über NoteBean gegen Notebean gesagt haben. Gleiches Ergebnis jedoch. – Thufir
@Thufir: Beachten Sie, dass Sie es in allen benannten Abfragen ändern sollten. – axtavt
Ich habe die Frage aktualisiert, um das Benennungsproblem zu beheben. – Thufir