Christoph Adl wrote:
>Hello!
>
>I'm using XDoclet2 for about a month and think that it is a great part of
>software, and a nice job you have done.
>
>BUT - I had a problem today. I'm using XDoclet2 to generate Hibernate-Mapping
>files. In a special case this does not work properly.
>
>First, I'm using Java 1.5 Typesafe Enums. Correct syntax with enums seem to
>crash the XDoclet parser:
>
>public enum TestEnum {
> Value1, Value2;
>}
>E:\build.xml:28: com.thoughtworks.qdox.parser.ParseException: syntax error
>@[x,y] in file:/E:/DerivedClass.java
>
>The parser does not like the semi-colon after "Value2", which is correct
>syntax according to the "Planet" example in
>http://java.sun.com/j2se/1.5.0/docs/guide/language/enums.html and the javac
>likes it as well. But that is not the big problem. Just to let u know. I just
>remove the semi-colon for now (which is correct syntax as well).
>
>The main problem is that if I use the @hibernate.typdef tag in a
>@hibernate.joined-subclass tag it does not lead to any XML output in the
>generated mapping file. Example:
>
>==== BaseClass.java ====
>package at.arcsmed.kio.beans;
>
>/**
> * @hibernate.class
> * table = "Base_Class"
> */
>public class BaseClass {
> /**
> * @hibernate.id
> * generator-class = "native"
> */
> private int id;
>
> /**
> * @return Returns the id.
> */
> public int getId() {
> return id;
> }
>
> /**
> * @param id The id to set.
> */
> public void setId(int id) {
> this.id = id;
> }
>}
>==== DerivedClass.java ====
>package at.arcsmed.kio.beans;
>// i've used the GenericEnumUserType from http://hibernate.org/272.html
>/**
> * @hibernate.joined-subclass
> * table = "DerivedClass"
> *
>* @hibernate.typedef
> * name = "TestEnumType"
> * class = "at.arcsmed.kio.beans.enums.GenericEnumUserType"
> * @hibernate.typedef-param
> * typedef-name = "TestEnumType"
> * name = "enumClass"
> * value = "at.arcsmed.kio.beans.DerivedClass$TestEnum"
> */
>public class DerivedClass extends BaseClass {
> public enum TestEnum {
> Value1, Value2
> }
>
> /**
> * @hibernate.property
> * type = "TestEnumType"
> */
> private TestEnum test;
>
> /**
> * @return Returns the test.
> */
> public TestEnum getTest() {
> return test;
> }
>
> /**
> * @param test The test to set.
> */
> public void setTest(TestEnum test) {
> this.test = test;
> }
>}
>==== BaseClass.hbm.xml (generated via xdoclet2) ====
><?xml version="1.0" encoding="ISO-8859-1"?>
><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD
>3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd";>
>
><hibernate-mapping>
> <class table="Base_Class" name="at.arcsmed.kio.beans.BaseClass">
> <id name="id">
> <generator class="native"/>
> </id>
> <joined-subclass name="at.arcsmed.kio.beans.DerivedClass"
> table="DerivedClass">
> <key/>
> <property name="test" type="TestEnumType"/>
> </joined-subclass>
> </class>
></hibernate-mapping>
>
>=============
>There is no sign of my typedef :-(. While creating the example i realised,
>that there is a problem with the ANT integration as well. If i make changes to
>the DerivedClass.java-File, the BaseClass.hbm.xml file is not re-generated!
>This problem is probably a result of the fact, that the DerivedClass-Mapping
>must be included in the mapping file of BaseClass (a speciality of the
>Hibernate DTD). The solution is, to create the typedef-element in
>BaseClass.hbm.xml outside the class element (this must happen for the whole
>inheritance tree - so for joined-subclass elements in joined-subclass elements
>as well). So here is the proper BaseClass.hbm.xml file:
>
><?xml version="1.0" encoding="ISO-8859-1"?>
><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD
>3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd";>
>
><hibernate-mapping>
> <typedef class="at.arcsmed.kio.beans.enums.GenericEnumUserType"
> name="TestEnumType">
> <param name="enumClass">at.arcsmed.kio.beans.DerivedClass$TestEnum</param>
> </typedef>
> <class table="Base_Class" name="at.arcsmed.kio.beans.BaseClass">
> <id name="id">
> <generator class="native"/>
> </id>
> <joined-subclass name="at.arcsmed.kio.beans.DerivedClass"
> table="DerivedClass">
> <key/>
> <property name="test" type="TestEnumType"/>
> </joined-subclass>
> </class>
></hibernate-mapping>
>
>As a result of the missing typedef I get an error during the creation of the
>database schema with hibernate:
>Exception in thread "main" org.hibernate.MappingException: Could not determine
>type for: TestEnumType, for columns: [org.hibernate.mapping.Column(test)]
> [java] at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:265)
> [java] at org.hibernate.mapping.Column.getSqlTypeCode(Column.java:128)
> [java] at org.hibernate.mapping.Column.getSqlType(Column.java:172)
> [java] at org.hibernate.mapping.Table.sqlCreateString(Table.java:263)
> [java] at
> org.hibernate.cfg.Configuration.generateSchemaCreationScript(Configuration.java:669)
> [java] at
> org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:65)
> [java] at
> org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:49)
> [java] at
> at.arcsmed.kio.test.HibernateSchema.createSchema(HibernateSchema.java:29)
> [java] at
> at.arcsmed.kio.test.HibernateSchema.main(HibernateSchema.java:24)
>
>I hope this issues can be addressed somehow,
>
>regards
>Christoph
>
>===========================================
>
> DI Christoph ADL
> ARC Seibersdorf research GmbH
> Biomedical Engineering / eHealth systems
>
> Viktor-Kaplan-Straße 2/1
> A-2700 Wiener Neustadt, Austria
>
> T: +43 (0)2622 69290-41
> F: +43 (0)2622 69290-24
> E: [EMAIL PROTECTED]
> H: www.arcsmed.at
>
>
>
>
If you are using java 1.5 you may use hibernate annotations. With
annotations you will get more strict code:
@Entity(access=AccessType.FIELD)
@Table(name="Base_Class")
public class BaseClass {
@Id(generate=GeneratorType.NATIVE)
private int id;
...
}
Serge Bogatyrjov.
