Is there a reason you're setting a List of Maps? You may want to rethink the way your data is structured for code clarity.
It looks like you've hit a sensible restriction: Maps can't be properties. We can't index them. Instead, you may want to create a wrapper class and serialize it. On Fri, Feb 12, 2010 at 4:21 AM, vbjain <[email protected]> wrote: > Hello All, > > Right now i am using gwt with low level API for creation of dynamic > models. > > But i just got stucked at one place. I had stored my fields attributes > in below collection: > > List<Map<String, String>> fieldMap = new ArrayList<Map<String, > String>>(); > > And when i run following code it give me error on second line: > > Entity entity = new Entity("ModelList"); > entity.setProperty(model.getModelName(), fieldMap); > dataStore.put(entity); > > Error: java.lang.IllegalArgumentException: java.util.HashMap is not a > supported property type. > > How can i solve this? Actually i am learning all things JPA, JDO, low > level API, so i am not able to solve this small issue. > > Should i use low level API only for dynamic generation of models or is > there any other thing available? Application should not decrease the > performance. > > Thanks. > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-appengine-java%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
