continua-->
ordinabile:
codice:
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package model;

import java.io.Serializable;
import java.util.Collection;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;

/**
 *
 * @author orphen
 */
@Entity
@Table(name = "ordinabile")
@XmlRootElement
@NamedQueries({
    @NamedQuery(name = "Ordinabile.findAll", query = "SELECT o FROM Ordinabile o"),
    @NamedQuery(name = "Ordinabile.findByCod", query = "SELECT o FROM Ordinabile o WHERE o.cod = :cod")})
public class Ordinabile implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @NotNull
    @Column(name = "cod")
    private Integer cod;
    @OneToOne(cascade = CascadeType.ALL, mappedBy = "ordinabile")
    private Menu menu;
    @OneToOne(cascade = CascadeType.ALL, mappedBy = "ordinabile")
    private Piatto piatto;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "ordinabilecod")
    private Collection<Ordine> ordineCollection;

    public Ordinabile() {
    }

    public Ordinabile(Integer cod) {
        this.cod = cod;
    }

    public Integer getCod() {
        return cod;
    }

    public void setCod(Integer cod) {
        this.cod = cod;
    }

    public Menu getMenu() {
        return menu;
    }

    public void setMenu(Menu menu) {
        this.menu = menu;
    }

    public Piatto getPiatto() {
        return piatto;
    }

    public void setPiatto(Piatto piatto) {
        this.piatto = piatto;
    }

    @XmlTransient
    public Collection<Ordine> getOrdineCollection() {
        return ordineCollection;
    }

    public void setOrdineCollection(Collection<Ordine> ordineCollection) {
        this.ordineCollection = ordineCollection;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (cod != null ? cod.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 Ordinabile)) {
            return false;
        }
        Ordinabile other = (Ordinabile) object;
        if ((this.cod == null && other.cod != null) || (this.cod != null && !this.cod.equals(other.cod))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "model.Ordinabile[ cod=" + cod + " ]";
    }
    
}
questo e l'errore che da quando provo a fare un isnerimetno in ordinabile con queste 3 line di codice
Ordinabile o= new Ordinabile();
o.setCod(2);
emtityManager.persist(o);
l'errore che lancia e questo:
codice:
AVVERTENZA: Local Exception Stack: 
Exception [EclipseLink-6023] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.QueryException
Exception Description: The list of fields to insert into the table [DatabaseTable(ordinabile)] is empty.  You must define at least one mapping for this table.
	at org.eclipse.persistence.exceptions.QueryException.objectToInsertIsEmpty(QueryException.java:922)
	at org.eclipse.persistence.internal.expressions.SQLInsertStatement.buildCallWithoutReturning(SQLInsertStatement.java:59)
	at org.eclipse.persistence.internal.expressions.SQLModifyStatement.buildCall(SQLModifyStatement.java:61)
	at org.eclipse.persistence.descriptors.ClassDescriptor.buildCallFromStatement(ClassDescriptor.java:702)
	at org.eclipse.persistence.internal.queries.StatementQueryMechanism.setCallFromStatement(StatementQueryMechanism.java:387)
	at org.eclipse.persistence.internal.queries.StatementQueryMechanism.prepareInsertObject(StatementQueryMechanism.java:301)
	at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.prepareInsertObject(ExpressionQueryMechanism.java:1535)
	at org.eclipse.persistence.queries.InsertObjectQuery.prepare(InsertObjectQuery.java:109)
	at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:577)
	at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:537)
	at org.eclipse.persistence.internal.sessions.CommitManager.commitNewObjectsForClassWithChangeSet(CommitManager.java:216)
	at org.eclipse.persistence.internal.sessions.CommitManager.commitAllObjectsWithChangeSet(CommitManager.java:123)
	at org.eclipse.persistence.internal.sessions.AbstractSession.writeAllObjectsWithChangeSet(AbstractSession.java:3766)
	at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1404)
	at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.commitToDatabase(RepeatableWriteUnitOfWork.java:616)
	at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1511)
	at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.issueSQLbeforeCompletion(UnitOfWorkImpl.java:3115)
	at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.issueSQLbeforeCompletion(RepeatableWriteUnitOfWork.java:331)
	at org.eclipse.persistence.transaction.AbstractSynchronizationListener.beforeCompletion(AbstractSynchronizationListener.java:157)
	at org.eclipse.persistence.transaction.JTASynchronizationListener.beforeCompletion(JTASynchronizationListener.java:68)
	at com.sun.enterprise.transaction.JavaEETransactionImpl.commit(JavaEETransactionImpl.java:437)
	at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.commit(JavaEETransactionManagerSimplified.java:867)
	at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5115)
	at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4880)
	at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2039)
	at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1990)
	at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222)
	at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
	at $Proxy151.addOrdinabile(Unknown Source)
	at servlet.AggiungiPiatto.doPost(AggiungiPiatto.java:94)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:755)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
	at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1534)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
	at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
	at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
	at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)
	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
	at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
	at java.lang.Thread.run(Thread.java:662)
grazie per la'iuto