hbm2java - private members ?

[Pho Tek]

Is it possible to generate private setters/getters for my properties via the hbm2java tool ?

Thanks

Pho

[somkiat puisungnoen]

I'm not sure for my answer.

access attribute of property tag



The access attribute lets you control how Hibernate will access the property at runtime. By default, Hibernate will call the property get/set pair. If you specify access="field", Hibernate will bypass the get/set pair and access the field directly, using reflection. You may specify your own strategy for property access by naming a class that implements the interface net.sf.hibernate.property.PropertyAccessor.

 <property
        name="propertyName"                 (1)
        column="column_name"                (2)
        type="typename"                     (3)
        update="true|false"                 (4)
        insert="true|false"                 (4)
        formula="arbitrary SQL expression"  (5)
        access="field|property|ClassName"   (6)
/>
 

[Pradeep bhatt]

What is hbm2java ?

Is it a tool to generate java classes?

[Pradeep bhatt]

Is it possible to generate private setters/getters for my properties

What is use of private setters/getters ? Who will use it?

[somkiat puisungnoen]

Originally posted by Pradeep Bhat:
What is hbm2java ?

Is it a tool to generate java classes?

Yes. of course.

Hibernate Extensions. This package includes tools for the following tasks:

Java source generation from a mapping file (aka CodeGenerator, hbm2java)

mapping file generation from compiled Java classes or from Java source with XDoclet markup (aka MapGenerator, class2hbm)

There's actually another utitily living in Hibernate Extensions: ddl2hbm. It is considered deprecated and will no longer be maintained, Middlegen does a better job for the same task.

[Pho Tek]

Somkiat,

The "access" attribute is to tell Hibernate what PropertyAccessors to use.
hbm2java seems to be able to generate only public setters/getters. I want
these to be private.

Pho

[somkiat puisungnoen]

Originally posted by Pho Tek:
Somkiat,

The "access" attribute is to tell Hibernate what PropertyAccessors to use.
hbm2java seems to be able to generate only public setters/getters. I want
these to be private.

Pho

Why you want to do this?

[Alexandru Popescu]

Originally posted by Pho Tek:
Is it possible to generate private setters/getters for my properties via the hbm2java tool ?

Thanks

Pho

Yes it is possible using a meta element inside your property. The meta should look as:
<meta attribute="scope-get|scope-set|scope-field">private</meta>.

./pope

PS: I don't know how is Hibernate working after this. But I don't thing it is a good decision to use private getters/setters as their scope is to permit access to the property not to be internally used by the class.

[Pradeep bhatt]

But I don't thing it is a good decision to use private getters/setters as their scope is to permit access to the property not to be internally used by the class.

If you are using internally within a class then why dont you access fields directly.

[somkiat puisungnoen]

Originally posted by Pradeep Bhat:


If you are using internally within a class then why dont you access fields directly.

I agree with you...

[Pho Tek]

I want disallow the user of the class from setting nulls to some required properties.

Thus, if I have a mapped property "privateFoo", then I will codegen:

// included methods as part of codegen
public void setFoo(SomeType theFoo) {
    if (theFoo == null)
        throw new IllegalArgumentException("don't do that, moron!");
    setPrivateFoo(theFoo); 
}
 
// generated code
private SomeType getPrivateFoo() { .. }
private void setPrivateFoo(SomeType theFoo) {
    foo = theFoo;  
}

[ September 03, 2004: Message edited by: Pho Tek ]

[Alexandru Popescu]

So in fact need some more code generated on your source. The solution you want is not reachable. (for the same field generate 2 methods).

You can do the following trick. Generate the Hibernate POJOs with their natural getters/setters and then extend there overridding the settters.

./pope

[Max Andersen]

PS: I don't know how is Hibernate working after this. But I don't thing it is a good decision to use private getters/setters as their scope is to permit access to the property not to be internally used by the class.[/QB]

Hibernate does not "care". If the properties are private it uses reflection-tricks to access the private methods (this of course relies on the right security policies - but in a default Java VM you will not have problems)