Hi Vince, Thanks for sharing this. It has much more than what I need, but I'll cut a version off the addFilters() method for my use.
Thanks again, Keyur On Jan 6, 12:32 pm, Vince Bonfanti <[email protected]> wrote: > I've written such a translater that implements a subset of JDOQL: > > https://code.google.com/p/lowlevelquery/ > > <https://code.google.com/p/lowlevelquery/>There's really no documentation > other than the source code, which is a single class: > > https://code.google.com/p/lowlevelquery/source/browse/trunk/src/com/n... > > <https://code.google.com/p/lowlevelquery/source/browse/trunk/src/com/n...>The > LowLevelQuery class contains a number of static methods that let you execute > a JDOQL-like query string directly; for example: > > List<Entity> results = LowLevelQuery.asList( "select from myKind where > category = 'Java' and rating > 5" ); > > LowLevelQuery also implements the PreparedQuery interface; you can create a > LowLevelQuery instance from a query string and then use it just like you > would a PreparedQuery; for example: > > PreparedQuery myQuery = new LowLevelQuery( "select from myKind where > category = 'Java' and rating > 5" ); > List<Entity> results = myQuery.asList(); > > Let me know what you think. > > Vince > > On Wed, Jan 6, 2010 at 3:06 PM, keyurva <[email protected]> wrote: > > This is likely a common scenario and I'm wondering if someone has > > already written some code to do this that I can steal. > > > I'm using the low-level datastore API. In my app, users will be > > entering a SQL where clause. For instance: > > > category = "Java" and rating > 5 > > > This translates to the com.google.appengine.api.datastore.Query object > > as such: > > > Query q = new Query("a kind"); > > q.addFilter("category", Query.FilterOperator.EQUAL, "Java"); > > q.addFilter("rating", Query.FilterOperator.GREATER_THAN, 5); > > > Has anyone written a generic library that does this translation? > > > Thanks, > > Keyur > > > -- > > 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. > >
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