Hi guys!Im doing a web application using hibernate2.1, jdk1.3 and tomcat4.0.3 but Im getting an error.


Here's my java class

public class Material implements Serializable{
private String code = "";
private String description = "";
private String creUser = "";
private String modUser = "";
private Date creDate = null;
private Date modDate = null;
private char hw;
....
}


my xml mapping

<hibernate-mapping default-cascade="save-update">

<class name="vo.Material" table="eqp_material_types">
<id name="code">
<generator class="uuid.string"/>
</id>
<property name="description" length="60"/>
<property name="creUser" column="CREUSR" length="20"/>
<property name="modUser" column="MODUSR" length="20"/>
<property name="hw"/>
<property name="creDate"/>
<property name="creDate"/>
</class>
</hibernate-mapping>

when i try to load the class using the following code

try{
Configuration cfg = new Configuration()
.addClass(Material.class);
SessionFactory sf = cfg.buildSessionFactory();
Session session = sf.openSession();
Material material = (Material)session.load(vo.Material.class,"TSTSY");
System.out.println("Material is " + material.getCode());
}catch (Exception e) {
e.printStackTrace();
}

here's the error

java.lang.ExceptionInInitializerError: java.lang.NullPointerException
at java.util.HashMap.put(HashMap.java:327)
at net.sf.hibernate.type.TypeFactory.<clinit>(TypeFactory.java:50)
at net.sf.hibernate.util.ReflectHelper.reflectedPropertyType(ReflectHelper.java:70)
at net.sf.hibernate.mapping.SimpleValue.setTypeByReflection(SimpleValue.java:170)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:258)
at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1204)
at net.sf.hibernate.cfg.Configuration.add(Configuration.java:247)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:281)
at net.sf.hibernate.cfg.Configuration.addClass(Configuration.java:322)
at servlet.WebAppInit.init(WebAppInit.java:31)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:916)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:808)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3266)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:2479)
at org.apache.catalina.loader.WebappContextNotifier.run(WebappLoader.java:1329)
at java.lang.Thread.run(Thread.java:484)

btw, im using oracle91 db.

thanks.


raymond

Give more details about your Configuration object, your datasource...

As of the moment Im using the hibernate.property.


hibernate.dialect net.sf.hibernate.dialect.Oracle9Dialect
hibernate.connection.driver_class oracle.jdbc.driver.OracleDriver
hibernate.connection.username equipment
hibernate.connection.password lifegoeson
hibernate.connection.url jdbc:oracle:thin:@mios29:1551:ORAT9