Hibernate table per class hierarchy

[Hemakanta Sethi]

Hi.. Friends
I am trying to solve the below Exception, but i could not.

Exception in thread "main" org.hibernate.InvalidMappingException: Could not parse mapping document from
resource payment.hbm.xml

Below i give the all the related files.
1. Exception Details
2. Payment.java
3. payment.hbm.xml
4. hibernate.cfg.xml
5. CreditCardPayment.java
6. ChequePayment.java
7. Client1.java

Can anyone please guide me on how to resolve this issue.
Below are the details of the Exception.



Exception Details
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Exception in thread "main" org.hibernate.InvalidMappingException: Could not parse mapping document from
resource payment.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:569)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1587)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1555)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1534)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1508)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
at Client1.main(Client1.java:14)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from invalid mapping
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:502)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:566)
... 6 more
Caused by: org.xml.sax.SAXParseException: Attribute "colume" must be declared for element type "discrimi
nator".
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHand
lerWrapper.java:195)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:13
1)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:38
4)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:31
8)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.addDTDDefaultAttrsAndValidate(XML
DTDValidator.java:1275)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleStartElement(XMLDTDValidato
r.java:1940)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.emptyElement(XMLDTDValidator.java
:785)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocume
ntScannerImpl.java:377)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.
next(XMLDocumentFragmentScannerImpl.java:2755)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.ja
va:648)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImp
l.java:140)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocume
ntFragmentScannerImpl.java:511)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:8
08)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:7
37)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:120
5)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:
522)
at org.dom4j.io.SAXReader.read(SAXReader.java:465)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:499)




Payment.java
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Payment.java

public class Payment 
{ 
private int paymentId; 
private double amount; 

public void setPaymentId(int paymentId) 
{ 
this.paymentId=paymentId; 
} 
public int getPaymentId() 
{ 
return paymentId; 
} 
public void setAmount(double amount) 
{ 
this.amount=amount; 
} 
public double getAmount() 
{ 
return amount; 
} 

} 

payment.hbm.xml
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- payment.hbm.xml --> <hibernate-mapping> <class name="Payment" table="PAYMENT" > <id name="paymentId" column="PAYID"> <generator class="assigned"/> </id> <!-- <discriminator> element always immediately after <id> element --> <discriminator colume="PMODE" type="java.lang.String" length="10" /> <property name="amount"/> <subclass name="CreditCardPayment" discriminator-value="CC"> <property name="cardType" column="CCTYPE" length="10" /> </subclass> <subclass name="ChequePayment" discriminator-value="CH"> <property name="chequeType" column="CHTYPE" length="10" /> </subclass> </class> </hibernate-mapping> hibernate.cfg.xml ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <!-- hibernate.cfg.xml --> <hibernate-configuration> <session-factory> <!-- connectio properties --> <property name="connection.driver_class">oracle.jdbc.OracleDriver</property> <property name="connection.url">jdbc:oracle:thin:@localhost:1521:SATYA</property> <property name="connection.username">scott</property> <property name="connection.password">tiger</property> <!-- hibernate properties --> <property name="show_sql">true</property> <property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property> <property name="hbm2ddl.auto">update</property> <!-- mapping resourses --> <mapping resource="payment.hbm.xml"/> </session-factory> </hibernate-configuration>
CreditCardPayment.java
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CreditCardPayment.java

public class CreditCardPayment extends Payment 
{ 
private String cardType; 

public void setCardType(String cardType) 
{ 
this.cardType=cardType; 
} 
public String getCardType() 
{ 
return cardType; 
} 

} 


ChequePayment.java 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

// ChequePayment.java 

public class ChequePayment extends Payment 
{ 
private String chequeType; 

public void setChequeType(String chequeType) 
{ 
this.chequeType=chequeType; 
} 
public String getChequeType() 
{ 
return chequeType; 
} 

} 

Client1.java
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Client1.java
*
*
*/

import org.hibernate.*; 
import org.hibernate.cfg.*; 

public class Client1 
{ 
static public void main(String client[]) 
{ 
SessionFactory factory = new Configuration().configure("hibernate.cfg.xml").buildSessionFactory(); 
Session session= factory.openSession(); 


CreditCardPayment ccp= new CreditCardPayment(); 
ccp.setPaymentId(101); 
ccp.setCardType("VISA"); 
ccp.setAmount(3000); 


ChequePayment chp= new ChequePayment(); 
chp.setPaymentId(101); 
chp.setChequeType("order"); 
chp.setAmount(3000); 


Transaction tx= session.beginTransaction(); 
session.save(ccp); 
session.save(chp); 
tx.commit(); 
System.out.println("Done...."); 

session.close(); 
factory.close(); 


} 
} 

I rechecked the xml mapping file many times still i could not able to find out the error. Can anyone please guide me on how to resolve this issue?

Advanced Thanks....

[Vas Miriyala]

I think you have spelled wrongly for column,replace column instead of colume in payment.hbm.xml