I also realize that examples would explain this
better.
In my application I had a need to get access to all
JAXB Java content tree mapped from XML element or
attribute. Here is an example:
If I have an instance of any base class say,
baseContentObject(which is a JAXB Java content object
already unmarshalled from XML instance doc) and I want
to iterate thru all content object inside it, I can do
this as below:
....
....
PropertyDescriptor[] propertyDescriptors =
PropertyUtil.getPropertyDescriptors(baseContentObject);
for (int i = 0; i < propertyDescriptors.length; i++) {
if (propertyName.startsWith("primaryInterface"))
continue;//ignore unwanted system property
String propertyName =
propertyDescriptors[i].getName();
Method readMethod =
propertyDescriptors[i].getReadMethod();
try {
Object propertyValue =
readMethod.invoke(baseContentObject, null);
System.out.println("baseContentObject has
property[" + i + "]: name=" + propertyName + "value="
+ propertyValue);
//do application specific processing on this
property(which is another java content tree)
} catch (IllegalAccessException illAccEx) {
illAccEx.printStackTrace();
} catch (InvocationTargetException invTarEx) {
invTarEx.printStackTrace();
}
....
....
where PropertyUtil.getPropertyDescriptors() was as
attached in my last email, which is as below:
public static PropertyDescriptor[]
getPropertyDescriptors(Object obj) {
if (obj == null) return null;
Class bean = obj.getClass();
BeanInfo beanInfo = null;
try {
beanInfo = Introspector.getBeanInfo(bean,
Object.class);
} catch(IntrospectionException e) {
System.err.println("Couldn't introspect " +
bean.getName());
return null;
}
return beanInfo.getPropertyDescriptors();
}
Hope this helps.
--ganga
--- Jerome Candat <jerome.candat_at_C-S.FR> wrote:
> On Wed, 4 Jun 2003 12:10:42 -0700, Ganga Sah
> <ganga_sah_at_yahoo.com> wrote:
>
> >Here is the futher deatils on my approach to this
> >problem.
> >I am attaching PropertyUtil class which has methods
> to
> >find property value(JAXB Java content object)
> inside
> >any base object(also JAXB Java content object,
> which
> >could be the root of Java content tree) with a
> given
> >one propertyName or an array of propertyName(s).
> >The methods returns the first object matching the
> >propertyName, which can be enhanced to return a
> list
> >of all matching objects.
> >Hope this helps.
> >
> >(I have extraced these methods with some twicking
> out
> >of my application, and have not tested it
> seperately).
> >
> >--ganga
>
> Sorry but I do not understand how you "attach" your
> PropertyUtil class inside your base object. Could
> you give an example please?
>
> Thanks in advance.
> J?r?me.
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