Hi Sohani, +1 to use LinkedHashMaps instead of HashMaps since former make sure the order of the items as you have mentioned. LinkedHashMaps has a higher memory footprint but it has a better performance when accessing values in the map (refer [1]). If we need a guarantee in the order of items we insert into the map, there is no option than using the LinkedHashMap.
[1] http://stackoverflow.com/questions/12998568/hashmap-vs-linkedhashmap-performance-in-iteration-over-values Thanks, Chanaka On Mon, Jun 20, 2016 at 2:51 PM, Sohani Weerasinghe <soh...@wso2.com> wrote: > Hi All, > > We are in a process of $subject and the main issue we faced in generating > the json schema was as follows. > > When generating the json schema we mainly convert the xml to json and the > xml to json conversion does not guarantee the order since json object is an > unordered set of name/value pairs [1]. > > The main reason is the usage of HashMaps instead of LinkedHashMaps in > instantiating the JSONObjects and we could solve the issue by using the > LinkedHashMaps. > > This issue again occurs in serializing the schema while iterating through > the gmf tree, since we are generating the schema by creating the > JSONObjects and JSONArrays appropriately. We could solve this issue as well > by using the above solution and as a result, the generated tree and the > schema will maintain the order of the XML payload > > [1] > http://stackoverflow.com/questions/26034370/inverted-order-of-json-elements-in-java-after-xml-conversion > > Thanks, > Sohani > Sohani Weerasinghe > Senior Software Engineer > WSO2, Inc: http://wso2.com > > Mobile : +94 716439774 > Blog :http://christinetechtips.blogspot.com/ > Twitter : https://twitter.com/sohanichristine > -- Thank you and Best Regards, Chanaka Fernando Senior Technical Lead WSO2, Inc.; http://wso2.com lean.enterprise.middleware mobile: +94 773337238 Blog : http://soatutorials.blogspot.com LinkedIn:http://www.linkedin.com/pub/chanaka-fernando/19/a20/5b0 Twitter:https://twitter.com/chanakaudaya
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