Need Help..what should i use for this

Question

hello friends, i have to write a program which will load an xml file reader class at run time and depending on the content of xml file i'm going to generate mapping.. e.g xml file- <MyMapping> <ATO> <security type=int> </ATO> <FIX> <symbol type=String> </FIX> </MyMapping> Now i want to change the content of xml file without restarting my running application..changes should be reflected at runtime... also my xml file will contain nearly 1000 lines..so in this case which technique should i use whether i use JAXB which will give the classes of my xml file or any other ?? Also if i use JAXB whether JAXB gives classes corrsponding to my xml nodes (e.g ATO.java as per above example).

Answer 1

daitkarsachin wrote:
hi ,
here is my question again..my xml will have
<Message>
<ATO>
<somefiled="X" type=int value=35 />
</ATO>
<FIX>
<somefiled="Y" type=String value=50 />
<FIX>
</Message>
Now first i have to parse this xml ..then my java program is going to accept value from user ..and depending on user specified value i've to use either ATO or FIX fields...e.g if user value is 35 then my program should use fields within ATO node.
You will read the XML structure into some kind of memory model. When the user supplies a value you will search for a matching value (likely from a collection such as a map or list) and return the value in that object that you locate.
what should be done for this ..
See above.
and what if i change values in my xml file..will i have to restart my application to load xml again ?
If you change the file on the filesystem, you should simply be able to re-parse the XML file and update your in-memory model. If you instead update your in memory-model, you can serialize the model back to XML on the filesystem. Neither needs to necessarily have anything to do with application start-up (other than the fact that you would normally read in the XML model then, but updating is a separate concern, as would re-reading it).
- Saish