hbm2java ignores name attribute in property

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

I want to create Java classes with the hbm2java function of Hibernate Tools and get a problem with the name attribute in property.

Code:

...
<property
   name="Title"
   column="title"
   type="string"
   not-null="false"
   length="255"
/>
...

becomes

Code:

...
private String title;
...
@Column(name="title")
public String getTitle() {
   return this.Title;
}
...

If an query contains "... where Class.title = :searchTitle", it works, but not with "... where Class.Title = :searchTitle".
The hbm file renames the property, but in annotations something like this is missing.
Is there something I have setup in the Hibernate Tools?
Is renaming properties possible in Hibernate Annotations?
What would i have to change in the annotations by myself to get renaming?

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

Any suggestions?

littypreethkr · **Posted:** Fri Feb 13, 2009 6:14 am

"... where Class.Title = :searchTitle"
Well this query is not supposed to run if your property name is title. Coz in HQL property names and Class names are case-sensitive.

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

littypreethkr wrote:

"... where Class.Title = :searchTitle"
Well this query is not supposed to run if your property name is title. Coz in HQL property names and Class names are case-sensitive.

Yes, I know. But inside hbm files it is possible to "rename" the column name in database to an other name for the HQL.
I want to know if there is a similar way with Hibernate Annotations.

littypreethkr · **Posted:** Fri Feb 13, 2009 6:27 am

Are you talking about the "column" attribute of the "property" tag? If so @Column is the annotation counter part.

But I feel you are meaning something else. If so can you tell me how you

Iacturus wrote:

"rename" the column name in database to an other name for the HQL

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

No, I talk about the "name" attribute of the "property" tag in the hbm file.
Like:

Code:

<property
   name="Title"
   column="title"
   type="string"
   not-null="false"
   length="255"
/> 

The column attribute is the name of the colum inside the database.
The name attribute is the name which is used inside HQL queries.
For that name attribute, I did not found the annotation counter part.

littypreethkr · **Posted:** Fri Feb 13, 2009 6:46 am

Well while using annotations hibernate will take the name of the field as the name of the property.

<property name="title" column="T_TITLE" type="java.lang.String"/>

@Column(name="T_TITLE") ---> Equivalent to the column attribute
String title; ---> Equivalent to the name attribute
|
|------------------------> Equivalent to the type attribute

Hope this clears your doubt.

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

Hmm...
It does not work like you explained it for me. In my java class is written:

Code:

String Title;

That mean, that a query like "... where Class.Title = :searchTitle" should work, if I understood you right. But it does not work and I get the error "could not resolve property: Title".
So either it works otherwise or I made mistake somewhere.

Btw. as I used hbm2java, the annotations are written above the getter methods inside my java classes and not above the declaration of the variables. Involes this anything special?

littypreethkr · **Posted:** Fri Feb 13, 2009 7:47 am

The mistake you did is to name Title with an initial caps, in java beans the property names are supposed to start with a lower case letter.

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

littypreethkr wrote:

The mistake you did is to name Title with an initial caps, in java beans the property names are supposed to start with a lower case letter.

As u said it used supposed to be, but it does not have to.
And it was not me who named it "Title" in Java, it was the hbm2java Tool.

The whole problem is, that I used hbm files until now in my project, where the renaming works and ALL HQL queries are written in that way. But now I want to switch to Hibernate Annotations. So it seems, that I have to rewrite all my HQL queries or find a way to rename the properties with Hibernate Annotations. But the last thing does not seem to be possible. Right?

littypreethkr · **Posted:** Fri Feb 13, 2009 8:02 am

Iacturus wrote:

And it was not me who named it "Title" in Java, it was the hbm2java Tool.

The hbm2java named it "Title" because your hbm xml named it "Title"
<property
name="Title"
column="title"
type="string"
not-null="false"
length="255"
/>

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

littypreethkr wrote:

Iacturus wrote:

And it was not me who named it "Title" in Java, it was the hbm2java Tool.

The hbm2java named it "Title" because your hbm xml named it "Title"

Yes, I know that.
But my old queries do not work with the annotations generated by hbm2java, but they work with the hbms. I am looking for a way how I do not have to rewrite all my queries while using annotations.

littypreethkr · **Posted:** Fri Feb 13, 2009 8:12 am

Iacturus wrote:

I am looking for a way how I do not have to rewrite all my queries while using annotations.

You will either have to re-write your queries or you will have to make T caps manually in the generated pojo file.

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

/doublepost

Iacturus · **Joined:** Wed Feb 11, 2009 9:42 am **Posts:** 9

littypreethkr wrote:

.. you will have to make T caps manually in the generated pojo file.

Do you mean "String Title"? hbm2java generated it with T caps, but it does not work... thats my problem ^^