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Eclipse RCP - no persistent classes found for query class

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wintersleep

Post subject: Eclipse RCP - no persistent classes found for query class

Posted: Mon Oct 17, 2011 7:14 am

Newbie

Joined: Mon Oct 17, 2011 6:57 am
Posts: 2

Hi,

first of all, please excuse my poor English.

I've created an Eclipse RCP Plugin-Project with a view. The view should show articles that are stored in my database.

That's how Article.java looks like:

Code:

package model;

import javax.persistence.Column;
import javax.persistence.Entity;

@SuppressWarnings("serial")
@Entity
public class Article extends BaseEntity {

   @Column(nullable = false, unique = true)
   private String number;

   @Column(nullable = false)
   private String name;

   private float price;
   
   public String getNumber() {
      return number;
   }

   public void setNumber(String number) {
      this.number = number;
   }

   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }

   public float getPrice() {
      return price;
   }

   public void setPrice(float price) {
      this.price = price;
   }
}

The model provider:

Code:

package model;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;

public class ModelProvider {
   public static  ModelProvider INSTANCE = null;
   private List<Article> articles;

   @SuppressWarnings("unchecked")
   private ModelProvider()
   {
      EntityManagerFactory emf = Persistence.createEntityManagerFactory("adb");

      // First unit of work
      EntityManager em = emf.createEntityManager();
      EntityTransaction tx = em.getTransaction();
      
      tx.begin();
      List l = em.createQuery("select a from model.Article a").getResultList();
      articles = new ArrayList<Article>();
      for(Iterator i = l.iterator(); i.hasNext();)
      {
          Article a = (Article) i.next();
          articles.add(a);
      }
      //System.out.println(articles.get(0).getName());
   }
   
   public List<Article> getArticles() {
      return articles;
   }
   
   public static ModelProvider getInstance()
   {
      if (INSTANCE == null) {
         INSTANCE = new ModelProvider();
      }
      
      return INSTANCE;
   }
}

The View:

Code:

package toolproject;

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.part.ViewPart;

import model.Article;
import model.ModelProvider;

public class View extends ViewPart {
   public static final String ID = "ToolProject.view";

   private TableViewer viewer;
   // We use icons
   

   public void createPartControl(Composite parent) {
      GridLayout layout = new GridLayout(2, false);
      parent.setLayout(layout);
      Label searchLabel = new Label(parent, SWT.NONE);
      searchLabel.setText("Search: ");
      final Text searchText = new Text(parent, SWT.BORDER | SWT.SEARCH);
      searchText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL
            | GridData.HORIZONTAL_ALIGN_FILL));
      createViewer(parent);
   }

   private void createViewer(Composite parent) {
      viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL
            | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.BORDER);
      createColumns(parent, viewer);
      final Table table = viewer.getTable();
      table.setHeaderVisible(true);
      table.setLinesVisible(true);

      viewer.setContentProvider(new ArrayContentProvider());
      // Get the content for the viewer, setInput will call getElements in the
      // contentProvider
      viewer.setInput(ModelProvider.getInstance().getArticles());
      // Make the selection available to other views
      getSite().setSelectionProvider(viewer);
      // Set the sorter for the table

      // Layout the viewer
      GridData gridData = new GridData();
      gridData.verticalAlignment = GridData.FILL;
      gridData.horizontalSpan = 2;
      gridData.grabExcessHorizontalSpace = true;
      gridData.grabExcessVerticalSpace = true;
      gridData.horizontalAlignment = GridData.FILL;
      viewer.getControl().setLayoutData(gridData);
   }

   public TableViewer getViewer() {
      return viewer;
   }

   // This will create the columns for the table
   private void createColumns(final Composite parent, final TableViewer viewer) {
      String[] titles = { "Number", "Name", "Price"};
      int[] bounds = { 100, 100, 100};

      // First column is for the first name
      TableViewerColumn col = createTableViewerColumn(titles[0], bounds[0], 0);
      col.setLabelProvider(new ColumnLabelProvider() {
         @Override
         public String getText(Object element) {
            Article a = (Article) element;
            return a.getNumber();
         }
      });

      // Second column is for the last name
      col = createTableViewerColumn(titles[1], bounds[1], 1);
      col.setLabelProvider(new ColumnLabelProvider() {
         @Override
         public String getText(Object element) {
            Article a = (Article) element;
            return a.getName();
         }
      });

      // Now the gender
      col = createTableViewerColumn(titles[2], bounds[2], 2);
      col.setLabelProvider(new ColumnLabelProvider() {
         @Override
         public String getText(Object element) {
            Article a = (Article) element;
            return ""+a.getPrice();
         }
      });
   }

   private TableViewerColumn createTableViewerColumn(String title, int bound, final int colNumber) {
      final TableViewerColumn viewerColumn = new TableViewerColumn(viewer,
            SWT.NONE);
      final TableColumn column = viewerColumn.getColumn();
      column.setText(title);
      column.setWidth(bound);
      column.setResizable(true);
      column.setMoveable(true);
      return viewerColumn;

   }

   
/**
    * Passing the focus request to the viewer's control.
    */

   public void setFocus() {
      viewer.getControl().setFocus();
   }
}

persistence.xml

Code:

<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
        http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">

    <!-- JPA test "unit" -->
    <persistence-unit name="adb" transaction-type="RESOURCE_LOCAL" >
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
         
            <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/prog"/>
            <property name="hibernate.connection.username" value="postgres"/>
            <property name="hibernate.connection.password" value="postgres"/>
            <property name="hibernate.connection.pool_size" value="5"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
            <property name="hibernate.hbm2ddl.auto" value="update"/>
            <property name="hibernate.show_sql" value="true"/>
            <property name="hibernate.format_sql" value="true"/>
        </properties>
    </persistence-unit>

</persistence>

I can see the view with the table in it but the data sets from my table are not fetched due to following exception:

Quote:

17.10.2011 13:08:43 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.0.CR2}
17.10.2011 13:08:43 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.0.0.CR4}
17.10.2011 13:08:43 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
17.10.2011 13:08:43 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
17.10.2011 13:08:43 org.hibernate.ejb.packaging.InputStreamZippedJarVisitor doProcessElements
WARN: HHH015010: Unable to find file (ignored): bundleresource://27.fwk25860399
java.io.FileNotFoundException: C:\workspace\ToolProject\bin (access is denied)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at org.eclipse.osgi.framework.util.SecureAction.getFileInputStream(SecureAction.java:124)
at org.eclipse.osgi.baseadaptor.bundlefile.FileBundleEntry.getInputStream(FileBundleEntry.java:56)
at org.eclipse.osgi.framework.internal.core.BundleURLConnection.connect(BundleURLConnection.java:53)
at org.eclipse.osgi.framework.internal.core.BundleURLConnection.getInputStream(BundleURLConnection.java:99)
at java.net.URL.openStream(Unknown Source)
at org.hibernate.ejb.packaging.InputStreamZippedJarVisitor.doProcessElements(InputStreamZippedJarVisitor.java:60)
at org.hibernate.ejb.packaging.AbstractJarVisitor.getMatchingEntries(AbstractJarVisitor.java:148)
at org.hibernate.ejb.packaging.NativeScanner.getClassesInJar(NativeScanner.java:126)
at org.hibernate.ejb.Ejb3Configuration.addScannedEntries(Ejb3Configuration.java:482)
at org.hibernate.ejb.Ejb3Configuration.addMetadataFromScan(Ejb3Configuration.java:472)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:358)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:55)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at model.ModelProvider.<init>(ModelProvider.java:38)
at model.ModelProvider.getInstance(ModelProvider.java:62)
at toolproject.View.createViewer(View.java:49)
at toolproject.View.createPartControl(View.java:35)
at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:367)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:226)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)
at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:529)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209)
at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1608)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:649)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:576)
at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:568)
at org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:272)
at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:982)
at org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPage.java:2626)
at org.eclipse.ui.internal.WorkbenchWindow$27.run(WorkbenchWindow.java:2965)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:2946)
at org.eclipse.ui.internal.WorkbenchWindow.busyOpenPage(WorkbenchWindow.java:761)
at org.eclipse.ui.internal.Workbench$21.runWithException(Workbench.java:1045)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3885)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3506)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
at org.eclipse.ui.internal.Workbench$28.runWithException(Workbench.java:1384)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:179)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4342)
at org.eclipse.ui.internal.StartupThreading.runWithoutExceptions(StartupThreading.java:94)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:1379)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2335)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at toolproject.Application.start(Application.java:20)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!)
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000115: Hibernate connection pool size: 5
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000006: Autocommit mode: true
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000401: using driver [org.postgresql.Driver] at URL [jdbc:postgresql://localhost:5432/prog]
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000046: Connection properties: {user=postgres, password=****, autocommit=true, release_mode=auto}
17.10.2011 13:08:43 org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.PostgreSQLDialect
17.10.2011 13:08:43 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation
INFO: HHH000424: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException
17.10.2011 13:08:43 org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000268: Transaction strategy: org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory
17.10.2011 13:08:43 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
17.10.2011 13:08:43 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000228: Running hbm2ddl schema update
17.10.2011 13:08:43 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000102: Fetching database metadata
17.10.2011 13:08:44 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000396: Updating schema
17.10.2011 13:08:44 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000232: Schema update complete
17.10.2011 13:08:44 org.hibernate.hql.internal.QuerySplitter concreteQueries
WARN: HHH000183: no persistent classes found for query class: select a from model.Article a

Any ideas how to solve this issue?

Thank you in advance!

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wintersleep

Post subject: Re: Eclipse RCP - no persistent classes found for query class

Posted: Tue Oct 18, 2011 10:07 am

Newbie

Joined: Mon Oct 17, 2011 6:57 am
Posts: 2

For everybody who suffers with this exception, I have solved it by putting the persistence.xml in the same diretory where hibernate-entitymanager-4.0.0.CR4.jar is located.

Maybe this helps you as well.

wintersleep

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lakshmig123

Post subject: Re: Eclipse RCP - no persistent classes found for query class

Posted: Wed Apr 19, 2017 2:59 pm

Newbie

Joined: Wed Apr 19, 2017 2:44 pm
Posts: 1

Hi

I am not getting any results, got the below warning message
WARN: HHH000183: no persistent classes found for query class: from com.persistent.Employees

Could you please help us to solve this problem.

Thank you in advance.

package com.persistent;

import java.io.File;
import java.util.List;

import org.hibernate.Session;
import org.hibernate.Transaction;

public class Test {

@SuppressWarnings("deprecation")
public static void main(String[] args) {
// TODO Auto-generated method stub

List<com.persistent.Employees> employeesList=null;
Session session = HibernateUtil.getSessionFactory().openSession();

if(session.isOpen()){
System.out.println("Session");
}

Transaction trnsction = session.beginTransaction();

System.out.println(session.createQuery("from com.persistent.Employees").list().size());
/*employeesList= lQuery.getResultList();
System.out.println("employee list"+ employeesList.size());

if(employeesList!=null && employeesList.size()>0){

for(Employees e:employeesList){
System.out.println(e.getEmployeeId()+" : "+ e.getFirstName()+" : "+e.getLastName());
}

}else{
System.out.println("Nothing is here to print");
}*/

trnsction.commit();
session.close();

}

}

Employee hbm

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="com.persistent.Employees" table="EMPLOYEES">
<id name="employeeId" type="long">
<column name="EMPLOYEE_ID" />
<generator class="assigned" />
</id>
<property name="firstName" type="java.lang.String">
<column name="FIRST_NAME" />
</property>
<property name="hiredate" type="java.util.Date">
<column name="HIRE_DATE" />
</property>
<property name="jobId" type="java.lang.String">
<column name="JOB_ID" />
</property>
<property name="phoneNumber" type="java.lang.String">
<column name="PHONE_NUMBER" />
</property>
<property name="departmentId" type="java.lang.Integer">
<column name="DEPARTMENT_ID" />
</property>
<property name="commissionpct" type="java.lang.Integer">
<column name="COMMISSION_PCT" />
</property>
<property name="managerId" type="java.lang.Integer">
<column name="MANAGER_ID" />
</property>
<property name="lastName" type="java.lang.String">
<column name="LAST_NAME" />
</property>
<property name="salary" type="java.lang.Integer">
<column name="SALARY" />
</property>
</class>
</hibernate-mapping>

hibernate cfg file

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:XE</property>
<property name="hibernate.connection.password">velan1982</property>
<property name="hibernate.connection.username">SYSTEM</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.acquire_increment">1</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.timeout">300</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>
<property name="hibernate.show_sql">true</property>
<mapping class="com.persistent.Department" package="com.persistent" resource="com/persistent/Department.hbm.xml"/>
<mapping class="com.persistent.Location" package="com.persistent" resource="com/persistent/Location.hbm.xml"/>
<mapping class="com.persistent.Countries"
package="com.persistent.Department" resource="com/persistent/Countries.hbm.xml"/>
<mapping class="com.persistent.Job" package="com.persistent" resource="com/persistent/Job.hbm.xml"/>
<mapping class="com.persistent.JobGrades" package="com.persistent" resource="com/persistent/JobGrades.hbm.xml"/>
<mapping class="com.persistent.JobHistor" package="com.persistent" resource="com/persistent/JobHistor.hbm.xml"/>
<mapping class="com.persistent.Employees" package="com.persistent" resource="com/persistent/Employees.hbm.xml"/>
</session-factory>
</hibernate-configuration>

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