| Unknown entity type [message #478702] |
Thu, 06 August 2009 08:53  |
Eclipse User |
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Hi,
I have an application with added derby.jar, added eclipselink.jar and
javax.persistence.jar from eclipse eclipselink-2.0.0.v20090731-r4765
installtion zip.
I have entity class and some usage of this class and got different ind
of message when try to use it like:
Exception in thread "main" java.lang.IllegalArgumentException: An
exception occurred while creating a query in EntityManager:
Exception Description: Error compiling the query [select object(o) from
DiscountCode as o]. Unknown entity type [DiscountCode].
///
Caused by: Exception [EclipseLink-8034] (Eclipse Persistence Services -
2.0.0.v20090731-r4765): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Error compiling the query [select object(o) from
DiscountCode as o]. Unknown entity type [DiscountCode].
///
sometimes (may be with different version of eclipselink I have also
message about missed "@Entity annotation"
What may be wrong?
////////////////////////
my persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
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_2_0.xsd">
<persistence-unit name="JavaApplication8PU"
transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider >
<class>javaapplication8.DiscountCode</class>
<properties>
<property name="javax.persistence.jdbc.url"
value="jdbc:derby://localhost:1527/sample"/>
<property name="javax.persistence.jdbc.password" value="app"/>
<property name="javax.persistence.jdbc.driver"
value="org.apache.derby.jdbc.ClientDriver"/>
<property name="javax.persistence.jdbc.user" value="app"/>
</properties>
</persistence-unit>
</persistence>
my entity:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package javaapplication8;
import java.io.Serializable;
import java.math.BigDecimal;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
/**
*
* @author sp153251
*/
@Entity
@Table(name = "DISCOUNT_CODE")
@NamedQueries({@NamedQuery(name = "DiscountCode.findAll", query =
"SELECT d FROM DiscountCode d"), @NamedQuery(name =
"DiscountCode.findByDiscountCode", query = "SELECT d FROM DiscountCode d
WHERE d.discountCode = :discountCode"), @NamedQuery(name =
"DiscountCode.findByRate", query = "SELECT d FROM DiscountCode d WHERE
d.rate = :rate")})
public class DiscountCode implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Basic(optional = false)
@Column(name = "DISCOUNT_CODE")
private Character discountCode;
@Column(name = "RATE")
private BigDecimal rate;
public DiscountCode() {
}
public DiscountCode(Character discountCode) {
this.discountCode = discountCode;
}
public Character getDiscountCode() {
return discountCode;
}
public void setDiscountCode(Character discountCode) {
this.discountCode = discountCode;
}
public BigDecimal getRate() {
return rate;
}
public void setRate(BigDecimal rate) {
this.rate = rate;
}
@Override
public int hashCode() {
int hash = 0;
hash += (discountCode != null ? discountCode.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 DiscountCode)) {
return false;
}
DiscountCode other = (DiscountCode) object;
if ((this.discountCode == null && other.discountCode != null)
|| (this.discountCode != null &&
!this.discountCode.equals(other.discountCode))) {
return false;
}
return true;
}
@Override
public String toString() {
return "javaapplication8.DiscountCode[discountCode=" +
discountCode + "]";
}
}
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