I think it is ok to just add iter-method in order for the class to
support 2-ways binding. I added iter-method to the class and now the
binding file compiling correctly.
However, in order to use usage="optional" attribute, I have to also
provide test-method. I am wondering what is the default test-method for
Collection classes? As when using field mapping to HashSet, there is no
need to specified test-method.
So the final mapping is looks like this:
<collection item-type="com.waveman.poc.Person" add-method="addEmployee"
iter-method="getEmployeesIterator" />
Thank you for your suggestion. I am better understand on the binding
mechanism. Now I have one other question regarding class inheritance
which I will post in another email.
Vairoj
--__--__--
Message: 2
Date: Wed, 09 Nov 2005 01:52:03 -0800
From: Dennis Sosnoski <[EMAIL PROTECTED]>
To: [email protected]
Subject: Re: [jibx-users] Re: Mapping bi-directional association
Reply-To: [email protected]
Ah, my mistake - you can use the add-method alone if you specify the
binding direction="input", just drop the field="employees" attribute
from the <collection>. I don't think there's currently any way to do
this for a binding that supports both input and output without adding a
method to the Person class (such as an iter-method that returns an
iterator for the items from the set).
The basic issue is that, as you said, the add-method is in the Person
class, not the Set<Person> class. If you don't specify field="employees"
on the <collection> element JiBX will look for the method on the
containing class, in this case Person.
- Dennis
Vairoj A. wrote:
Hi Dennis,
Thank you for the reply. It would be very great if all I need to do is
define the add-method attribute. According to my reply to Joshua, I
have tried adding add-method attribute to the collection mapping but
that does not work. Maybe I still does not understand your intention
correctly.
What I was understand from Joshua suggestion is to add 'add-method'
attribute to the collection mapping. So the mapping might looks like
this:
<mapping name="person" class="com.package.Person">
<value name="name" field="name" />
<collection name="employees" field="employees"
add-method="addEmployee" type="java.util.HashSet" item-type="Person" />
</mapping>
This mapping results in binding compilation error, as there is no
"addEmployee" method defined in HashSet. As the class looks like this:
class Person {
private Person employer;
private Set<Person> employees;
public void addEmployee(Person employee) {
employees.add(employee);
employee.employer = this;
}
public void setEmployer(Person employer) {
this.employer = employer;
}
}
As I understand the add-method attribute is to define the add-method
for the collection. However, the custom add-method used here is in
Person class.
Is it possible to tell mapping to use custom add method that does not
reside in collection class?
Cheers,
Vairoj
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