Why cant you use a file operation to append ? Marshall what you want to append, into a string and then append. Or open the file in append mode and do it. If you have to deal with root elements or positioning or large file, then use a RandomAccessFile...
-- pady > Date: Tue, 1 Apr 2008 17:10:03 -0700 > From: [EMAIL PROTECTED] > To: [email protected] > Subject: Re: [castor-user] append to a marshaled xml file > > > Hi, > > Your observation is correct. But I was trying to seek a way without > unmarshalling and re-marshalling as the xml would deal with thousands of > method call inputs. Unmarshaling such huge data and filling the list could > put memory constraints. > > My scenario is as follows: > > I have some 6 methods that could be called n number of times in any order at > any point of time in a day. I have to marshal the inputs from the method > called onto the xml. Suppose that method 1 is called in the start of the day > and it's object has been already marshaled into xml. > By overwriting what I meant was that when method 2 is called later, simply > marshal(method2 object) would result in loss of method 1 's data in the xml > as castor is making a fresh write of method 2's object onto the xml. Hence I > wanted to know if I could simply append method 2's object without disturbing > the already written method 1 object. (mapping.xml covers mapping for all the > methods) > > Please let me know if this is still not clear. Thanks in advance. > > > Werner Guttmann wrote: > > > > Hi, > > > > can you please elaborate a bit more on what you are trying to do ? It > > simply is not clear to me what you are trying to achieve. > > > > A few observations: > > > > a) In order to be able to process the list of items in code, you first > > need to unmarshal from the XML (using Unmarshaller). > > b) Once you've got your object (instance) hierarchy, you can modify the > > list's content using any of the methods of java.util.List. > > c) Once you are done with your modifications, simply marshal your object > > instance(s) to XML. > > > > In your question you are referring to 'and not overwrite the existing > > content'. That statement does not make any sense to me. > > > > Regards > > Werner > > > > Chayssiv wrote: > >> Hi, I have an xml file generated by marshaling a java class (using Castor > >> mapping). The class contains a list of items. As and when the list gets > >> filled up I would like to APPEND the new data in the class to the already > >> marshaled xml file (and not overwrite the existing contents of the > >> marshaled > >> xml file). Can this be done using Castor? If yes how can it be achieved? > >> Thanks. > > > > > > --------------------------------------------------------------------- > > To unsubscribe from this list, please visit: > > > > http://xircles.codehaus.org/manage_email > > > > > > > > > > -- > View this message in context: > http://www.nabble.com/append-to-a-marshaled-xml-file-tp16399131p16432024.html > Sent from the Castor - User mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe from this list, please visit: > > http://xircles.codehaus.org/manage_email > > _________________________________________________________________ Use video conversation to talk face-to-face with Windows Live Messenger. http://www.windowslive.com/messenger/connect_your_way.html?ocid=TXT_TAGLM_WL_Refresh_messenger_video_042008
