many-to-many mapping :: java.lang.NoClassDefFoundError

Crusider · **Joined:** Thu Apr 08, 2004 1:34 pm **Posts:** 1

hallo,

i am using hibernate v2.1.
i've just integrated many-to-many mapping and got the following error.

i have odmg-3.0.jar and xml-apis.jar in my classpath, as i found as hints from other posts. but this does not solve my problem.

i replaced some values with foo and bar.

any ideas?
thanks,
norman

logger output:

Code:

...
27:31,725  INFO Environment:462 - Hibernate 2.1.2
27:31,729  INFO Environment:491 - hibernate.properties not found
27:31,735  INFO Environment:519 - using CGLIB reflection optimizer
27:31,747  INFO Configuration:854 - configuring from resource: /hibernate.cfg.xml
27:31,747  INFO Configuration:826 - Configuration resource: /hibernate.cfg.xml
27:32,193  INFO Configuration:311 - Mapping resource: de/inlet/gpc/mus/User.hbm.xml
27:32,316  INFO Binder:229 - Mapping class: de.inlet.gpc.mus.User -> users
27:32,396  INFO Binder:547 - Mapping collection: de.inlet.gpc.mus.User.fragments -> users_fragments
27:32,403  INFO Configuration:311 - Mapping resource: de/inlet/gpc/mus/Fragment.hbm.xml
27:32,445  INFO Binder:229 - Mapping class: de.inlet.gpc.mus.Fragment -> fragments
27:32,448  INFO Binder:547 - Mapping collection: de.inlet.gpc.mus.Fragment.users -> users_fragments
27:32,448  INFO Configuration:1017 - Configured SessionFactory: null
27:32,450  INFO Configuration:595 - processing one-to-many association mappings
27:32,464  INFO Configuration:604 - processing one-to-one association property references
27:32,465  INFO Configuration:629 - processing foreign key constraints
27:32,484  INFO Dialect:82 - Using dialect: net.sf.hibernate.dialect.MySQLDialect
27:32,485  INFO SettingsFactory:62 - Use outer join fetching: true
27:32,494  INFO DBCPConnectionProvider:56 - DBCP using driver: org.gjt.mm.mysql.Driver at URL: jdbc:mysql://foo/bar?autoReconnectForPools=true
27:32,494  INFO DBCPConnectionProvider:57 - Connection properties: {user=foo, password=bar}
27:32,531  INFO TransactionManagerLookupFactory:33 - No TransactionManagerLookup configured (in JTA environment, use of process level read-write cache is not recommended)
27:32,762  INFO SettingsFactory:102 - Use scrollable result sets: true
27:32,763  INFO SettingsFactory:105 - Use JDBC3 getGeneratedKeys(): true
27:32,764  INFO SettingsFactory:108 - Optimize cache for minimal puts: false
27:32,764  INFO SettingsFactory:114 - echoing all SQL to stdout
27:32,771  INFO SettingsFactory:117 - Query language substitutions: {}
27:32,771  INFO SettingsFactory:128 - cache provider: net.sf.ehcache.hibernate.Provider
27:32,774  INFO Configuration:1080 - instantiating and configuring caches
27:32,879  INFO SessionFactoryImpl:119 - building session factory
java.lang.NoClassDefFoundError
        at de.inlet.gpc.mus.DatabaseWrapper.getAllFragments(DatabaseWrapper.java:85)
        at de.inlet.gpc.mus.Playfield.load(Playfield.java:23)
        at de.inlet.gpc.mus.Playfield.<init>(Playfield.java:19)
        at de.inlet.gpc.mus.MuServer.run(MuServer.java:55)
...

example mapping xml file:

Code:

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 2.0//EN" 
    "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
    <class
        name="de.inlet.gpc.mus.User"
        table="users"
        dynamic-update="false"
        dynamic-insert="false"
    >

        <id
            name="id"
            column="id"
            type="int"
        >
            <generator class="native">
            </generator>
        </id>

        <property
            name="username"
            type="java.lang.String"
            update="true"
            insert="true"
            column="username"
        />

        <property
            name="password"
            type="java.lang.String"
            update="true"
            insert="true"
            column="password"
        />

        <property
            name="email"
            type="java.lang.String"
            update="true"
            insert="true"
            column="email"
        />

        <property
            name="fullname"
            type="java.lang.String"
            update="true"
            insert="true"
            column="fullname"
        />

        <property
            name="verified"
            type="boolean"
            update="true"
            insert="true"
            column="verified"
        />

        <set
            name="fragments"
            table="users_fragments"
            lazy="false"
            inverse="false"
            cascade="none"
            sort="unsorted"
        >

              <key
                  column="id"
              />

              <many-to-many
                  class="de.inlet.gpc.mus.Fragment"
                  column="id"
                  outer-join="auto"
              />

        </set>

        <!--
            To add non XDoclet property mappings, create a file named
                hibernate-properties-User.xml
            containing the additional properties and place it in your merge dir.
        -->

    </class>

</hibernate-mapping>

emmanuel · **Posted:** Tue Apr 20, 2004 10:40 am

How about checking DatabaseWrapper.java:85