ReverseEnginnering DB

caterham · **Posted:** Wed Sep 13, 2006 7:02 am

Hi all,

I use Hibernate Tool 3.2.0-beta7 and noticed that in my POJOs the column annotation sometimes contains a length attribute and sometimes not. The tables are all in the same Oracle schema and all are of type VARCHAR2.

Someone has an idea how I can achieve that the length attribute is always added to these columns? I want to automate my validation annotation generation process.

Thanks in advance,
Axel

max · **Posted:** Wed Sep 13, 2006 7:27 am

the length is only included if it is not equal to the default length, e.g. Column.DEFAULT_LENGTH

if you want a different behavior then look at column.hbm.ftl

caterham · **Posted:** Wed Sep 13, 2006 8:56 am

max wrote:

if you want a different behavior then look at column.hbm.ftl

I modified column.hbm.ftl. Now it looks like this.

Code:

<#if column.isFormula()>
<formula>${column.getFormula()}</formula>
<#else>
<column name="${column.quotedName}" ${c2h.columnAttributes(column)}>
<#if column.comment?exists>
<comment>${column.comment}</comment>
</#if>
</column>
<meta attribute="length">${column.length}</meta>
</#if>

It contains a meta-attribute length with the correct length. The XML file looks fine. I can see my meta attribute. e.g.

Code:

...
<property name="hitword" type="java.lang.String">
    <column name="HITWORD" not-null="true"></column>
    <meta attribute="length">255</meta>
</property>
...

But in my templates generating the annotated classes the meta attribute is not found resp. accessing it causes an exception.

Code:

...
${property.getMetaAttribute("length").getValue()}
...

Code:

Caused by: freemarker.core.InvalidReferenceException: Expression property.getMetaAttribute("length") is undefined on line 41, column 18 in pojo/PojoPropertyAccessors.ftl.

Can you give me a hint, why it's ignored here? I saw that the public method getMetaAttribute(String) exists in org.hibernate.mapping.Property! Are there only meta tags allowed mentioned in the doc as "Supported meta tags"? Formerly the meta tag length was valid (we used it). If it behaves like this, it would be impossible to store any information I want to use in my templates in a meta tag which I can compute in the templates. If the unknown meta tag will be ignored by other tools, this wouldn't matter.

Thanks,
Axel

caterham · **Posted:** Wed Sep 13, 2006 5:29 pm

Is it possible to call the public methods from org.hibernate.mapping.Property within my templates?

max · **Posted:** Thu Sep 14, 2006 2:02 am

The reason you are getting "undefined" is that the method returns null if there is no such meta attribute. Use c2j.getMetaAsString(property, "length", WhateverYouWantToBedefaultValue) to get a well defined result.

p.s. why are you putting in meta-attribute lengths here and not just adding it as the already existing attribute (e.g. only when it has the default value ?)