I want to create in hbm.xml this structure:

public interface IAudit {
public void setCreationDate(Date creationDate);
public void getCreationDate();
public void setLastUpdate(Date lastUpdate);
public void getLastUpdate();
}

public abstract BaseRow implements IAudit {
private Date creationDate, lastUpdate;
private Long id; //PK for each row
//Get and set for creationDate
...
//Get and set for lastUpdate
...
//Get and set for Id
...
}


I want that all my rows inherit from BaseRow, and I don't want to create a table for IAudit nor BaseRow( it's only a class to define a common type for row's PK (Long))

I have tried some things with hbm.xml files but nothing satifies my expectations. Anyone knows how can I do it?

Thanks

If those classes ain't persistent then you write them your self.

and then you say

<class name="whatever" ...>
<meta attribute="extends">BaseRow</meta>
</class>

btw. BaseRow sounds like a really horrible name for a class ? ;)

First, thanks for your response.

I write BaseRow (or RootRow if you prefer :)) , and I want that this class contains id (pk in each bd table). All rows in my system inherit BaseRow

I put a clause extends in hbm files but when hbm2java generates code dont put id in java files.

I prefer not to create BaseRow with joined class and discriminator, hibernate hbm2java tool can inherit the id from a java file?

How I do this?

So - you have certain properties you DON'T want generated, right ?

Look at the meta docs - one of the attributes does that (can't remember top of my head right now ;)

This is the problem

I want to write an abstract class called RootRows, this row only contains this properties:

<class name="RootRow" ...>
<meta attribute = "implements">IAudit</meta>
<!-- IAudit is a interface in a java file with this methods set/get creationDate and set/get lastUpdate -->
<id name = "id" type = "java.lang.Long">
<generator class="native"/>
</id>
<property name = "creationDate" type = "java.lang.Date"/>
<property name = "lastUpdate" type = "java.lang.Date"/>
</class>

I dont want to maintain a table in my DB for rows of this type.

The rows of my system (rows with associated table in DB) inherit from RootRow (inherit id, creationDate, and lastUpdate). I would like to define each of this rows in a separate hbm.xml

<class name="Person">
<meta attribute = "extends">RootRow</meta>
<!-- get id, creationDate and lastUpdate from RootRow -->
<property name = "name" type = "java.lang.String"/>
</class>

It could be possible?

(Another question: hibernate could gen java interfaces?)

Thanks for your patience

Yes!?

So, don't write a hbm.xml for RootRow and write that particular class your self.

The properties you do NOT want generated for other classes (which easily can be in other hbm.xml's) you add <meta attribute="gen-property">false</meta>

If you want hbm2java to generate interface instead of class you do
<meta attribute="interface">true</meta>.


All this is listed in the docs about <meta> - please read it!

I have this hbm.xml for an interface:

<hibernate-mapping package="mypackage">
<meta attribute = "interface">true</meta>
<class name = "mypackage.ICreationAuditing">
<property name = "creationDate"
column = "creation_date"
type = "date"/>
</class>
</hibernate-mapping>


hbm2java generates ICreation.java (interface) but throws an exception. hbm2ddl does no accept it. What is wrong in syntax?

Thanks

and the exception is ?

<?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 package="mypackage.interfaces">
<meta attribute = "class-description">
Blah blah blah
</meta>
<class name = "mypackage.interfaces.ILastUpdateAuditing">
<meta attribute = "interface">true</meta>
<property name = "lastUpdate"
column = "last_update"
type = "date"/>
</class>
</hibernate-mapping>


hbm2java
********
GRAVE: Error parsing XML: file:ILastUpdateAuditing.hbm.xml(11)
org.xml.sax.SAXParseException: El elemento "class" no permite "property" aqu.
at org.apache.crimson.parser.Parser2.error(Parser2.java:3160)
at org.apache.crimson.parser.ValidatingParser$ChildrenValidator.consume(ValidatingParser.java:349)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1317)
at org.apache.crimson.parser.Parser2.content(Parser2.java:1779)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1507)
at org.apache.crimson.parser.Parser2.content(Parser2.java:1779)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1507)
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:500)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:305)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:442)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:354)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:707)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:689)
at net.sf.hibernate.tool.hbm2java.CodeGenerator.main(CodeGenerator.java:98)
at com.lovenetic.deployment.RowCompiler.<init>(RowCompiler.java:28)
at com.lovenetic.deployment.RowCompiler.main(RowCompiler.java:41)
10-feb-2004 9:14:28 net.sf.hibernate.tool.hbm2java.CodeGenerator$1 error
GRAVE: Error parsing XML: file:ILastUpdateAuditing.hbm.xml(14)
org.xml.sax.SAXParseException: El elemento "class" requiere elementos adicionales.
at org.apache.crimson.parser.Parser2.error(Parser2.java:3160)
at org.apache.crimson.parser.ValidatingParser$ChildrenValidator.done(ValidatingParser.java:361)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1519)
at org.apache.crimson.parser.Parser2.content(Parser2.java:1779)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1507)
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:500)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:305)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:442)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:354)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:707)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:689)
at net.sf.hibernate.tool.hbm2java.CodeGenerator.main(CodeGenerator.java:98)
at com.lovenetic.deployment.RowCompiler.<init>(RowCompiler.java:28)
at com.lovenetic.deployment.RowCompiler.main(RowCompiler.java:41)



hbm2ddl
*******
10-feb-2004 9:19:24 net.sf.hibernate.cfg.Environment <clinit>
INFO: Hibernate 2.1.1
10-feb-2004 9:19:24 net.sf.hibernate.cfg.Environment <clinit>
INFO: hibernate.properties not found
10-feb-2004 9:19:24 net.sf.hibernate.cfg.Environment <clinit>
INFO: using CGLIB reflection optimizer
10-feb-2004 9:19:24 net.sf.hibernate.cfg.Configuration addFile
INFO: Mapping file: ILastUpdateAuditing.hbm.xml
10-feb-2004 9:19:24 net.sf.hibernate.util.XMLHelper$ErrorLogger error
GRAVE: Error parsing XML: ILastUpdateAuditing.hbm.xml(11) El elemento "class" no permite "property" aqu.
10-feb-2004 9:19:24 net.sf.hibernate.util.XMLHelper$ErrorLogger error
GRAVE: Error parsing XML: ILastUpdateAuditing.hbm.xml(14) El elemento "class" requiere elementos adicionales.
10-feb-2004 9:19:25 net.sf.hibernate.cfg.Binder bindRootClass
INFO: Mapping class: mypackage.interfaces.ILastUpdateAuditing -> ILastUpdateAuditing
10-feb-2004 9:19:25 net.sf.hibernate.cfg.Configuration addFile
GRAVE: Could not configure datastore from file: ILastUpdateAuditing.hbm.xml
java.lang.NullPointerException
at net.sf.hibernate.mapping.PersistentClass.createPrimaryKey(PersistentClass.java:226)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:342)
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.addFile(Configuration.java:169)
at com.lovenetic.deployment.SchemaGen.main(SchemaGen.java:61)
Exception in thread "main" net.sf.hibernate.MappingException: java.lang.NullPointerException
at net.sf.hibernate.cfg.Configuration.addFile(Configuration.java:175)
at com.lovenetic.deployment.SchemaGen.main(SchemaGen.java:61)
Caused by: java.lang.NullPointerException
at net.sf.hibernate.mapping.PersistentClass.createPrimaryKey(PersistentClass.java:226)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:342)
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.addFile(Configuration.java:169)
... 1 more

anyone has defined an hbm.xml to generate a java interface? Could post an example code please?

This is an exception message from the xml parser. You understand the error message better than me since it is in spanish(?) ;)

Upps, sorry!!This is in english

**
<?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 package="rows">
<meta attribute = "class-description">
blah blah
</meta>
<class name = "rows.ILastUpdateAuditing">
<meta attribute = "interface">true</meta>
<property name = "lastUpdate"
column = "last_update"
type = "date"/>
</class>
</hibernate-mapping>
**

English version:


*****
[java] Processing ILastUpdateAuditing.hbm.xml...
[java] 13-feb-2004 18:15:50 net.sf.hibernate.tool.hbm2java.CodeGenerator$1 error
[java] GRAVE: Error parsing XML: file:ILastUpdateAuditing.hbm.xml(14)
[java] org.xml.sax.SAXParseException: The content of element type "class" must match "(meta*,(cache|jcs-cache)?,(id|composite-id),discriminator?,(version|timestamp)?,(property|many-to-one|one-to-one|component|dynamic-component|any|map|set|list|bag|idbag|array|primitive-array)*,(subclass*|joined-subclass*))".
[java] at org.apache.xerces.framework.XMLParser.reportError(XMLParser.java:1213)
[java] at org.apache.xerces.validators.common.XMLValidator.reportRecoverableXMLError(XMLValidator.java:1851)
[java] at org.apache.xerces.validators.common.XMLValidator.callEndElement(XMLValidator.java:1495)
[java] at org.apache.xerces.framework.XMLDocumentScanner$ContentDispatcher.dispatch(XMLDocumentScanner.java:1204)
[java] at org.apache.xerces.framework.XMLDocumentScanner.parseSome(XMLDocumentScanner.java:381)
[java] at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:1098)
[java] at org.jdom.input.SAXBuilder.build(SAXBuilder.java:354)
[java] at org.jdom.input.SAXBuilder.build(SAXBuilder.java:707)
[java] at org.jdom.input.SAXBuilder.build(SAXBuilder.java:689)
[java] at net.sf.hibernate.tool.hbm2java.CodeGenerator.main(CodeGenerator.java:98)
[java] at RowCompiler.<init>(RowCompiler.java:29)
[java] at RowCompiler.main(RowCompiler.java:42)
[java] Processed
ILastUpdateAuditing.hbm.xml...
*****

You are missing an id property.