hi all
in my program there are two classes Customer and Account.

in my database i keep two tables customers and accounts to keep customers and Accounts.

one customer can have many accounts and one account can be owned to several customers. so i have many to many relation there.

these are my hbm.xml files
Account.hbm.xml

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

<hibernate-mapping>
<class name="Account" table="accounts">
<id name="accountNum" column="account_number">
<generator class="assined"/>
</id>
<property name="balance"/>
<property name="branch" />
<set name="customers" table="diposites" lazy="true" inverse="true">
<key>
<column name="account_number" not-null="true"/>
</key>
<many-to-many class="Customer">
<column name="cutomer_id" not-null="true"/>
</many-to-many>
</set>
</class>
</hibernate-mapping>

Customer.hbm.xml


<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Customer" table="customers">
<id name="CustomerId" column="customer_id">
<generator class="assigned"/>
</id>
<property name="name" type="String"/>

<set name="accounts" table="diposites" lazy="true" inverse="false">
<key>
<column name="cutomer_id" not-null="false"/>
</key>
<many-to-many class="Account">
<column name="account_number" not-null="true"/>
</many-to-many>
</set>
</class>
</hibernate-mapping>
is this the correct way to write hbm.xml file.(i saw it in the net)

but when compile it give this error

compile:
[javac] Compiling 4 source files to /home/wijitha/programing/hibernate/BankExample/build

run:
[echo] Runing the code
[java] log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
[java] log4j:WARN Please initialize the log4j system properly.
[java] Initial SessionFactory creation failed.org.hibernate.MappingException: Error reading resource: dev/Account.hbm.xml
[java] Exception in thread "main" java.lang.ExceptionInInitializerError
[java] at util.HibernateUtil.<clinit>(Unknown Source)
[java] at dev.BankManager.createAndStoreCustomer(Unknown Source)
[java] at dev.BankManager.main(Unknown Source)
[java] Caused by: org.hibernate.MappingException: Error reading resource: dev/Account.hbm.xml
[java] at org.hibernate.cfg.Configuration.addResource(Configuration.java:449)
[java] at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1313)
[java] at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1285)
[java] at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1267)
[java] at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1234)
[java] at org.hibernate.cfg.Configuration.configure(Configuration.java:1162)
[java] at org.hibernate.cfg.Configuration.configure(Configuration.java:1148)
[java] ... 3 more
[java] Caused by: org.hibernate.MappingException: class Account not found while looking for property: accountNum
[java] at org.hibernate.util.ReflectHelper.reflectedPropertyClass(ReflectHelper.java:81)
[java] at org.hibernate.mapping.SimpleValue.setTypeUsingReflection(SimpleValue.java:275)
[java] at org.hibernate.cfg.HbmBinder.bindSimpleId(HbmBinder.java:359)
[java] at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:293)
[java] at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:235)
[java] at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:151)
[java] at org.hibernate.cfg.Configuration.add(Configuration.java:360)
[java] at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:397)
[java] at org.hibernate.cfg.Configuration.addResource(Configuration.java:446)
[java] ... 9 more
[java] Caused by: java.lang.ClassNotFoundException: Account
[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
[java] at java.security.AccessController.doPrivileged(Native Method)
[java] at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
[java] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
[java] at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
[java] at java.lang.Class.forName0(Native Method)
[java] at java.lang.Class.forName(Class.java:169)
[java] at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:108)
[java] at org.hibernate.util.ReflectHelper.reflectedPropertyClass(ReflectHelper.java:77)
[java] ... 17 more
[java] Java Result: 1

BUILD SUCCESSFUL
Total time: 3 seconds

if any one know the answer please reply me. thanks.

regards
wijitha.

I think, here is the answer:


Hibernate cannot find this expected ressource, and this has nothing to do with many-to-many or the like.

Carlo
----------------------------
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