Re: Oddity trying to import members of an object?

2 replies

Sun, 2008-12-28, 05:29

Robin Barooah

Joined: 2008-12-21,

So I managed to answer my own question.
Using scalap, I see:
Garuda:target robin$ scalap -cp $TCLASS -verbose org.sublime.amazon.simpleDB.QueryCLASSPATH = /Users/robin/src/simpleDB-scala-binding/target/classes FILENAME = /Users/robin/src/simpleDB-scala-binding/target/classes/org/sublime/amazon/simpleDB/Query.classpackage org.sublime.amazon.simpleDB;abstract trait Query with scala.ScalaObject with org.sublime.amazon.simpleDB.SimpleDBRequest { def action(): java.lang.String; def maxNumberOfItems(): scala.Option; def nextToken(): scala.Option; def queryExpression(): scala.Option; def domainName(): java.lang.String; def specificParameters(): scala.collection.immutable.Map;}
It turns out that I have a trait called Query in the same package as my object Query.
Not sure what happens to the Object in this case, the compiler didn't object but the object appears to be shadowed or just plain disappeared.
-Robin
On Fri, Dec 26, 2008 at 11:32 PM, Robin <robin@sublime.org> wrote:

Hi,
I've been having trouble importing the members of an object, which is something I do all the time. It's entirely possible I've gone code-blind over the holidays, but this is really stumping me.
The source looks like this:
package org.sublime.amazon.simpleDB { object Query { abstract case class Expression { //def query :String }...
Which compiles fine. From the console (with the classpath set correctly by mvn scala:console), I do this:
scala> import org.sublime.amazon.simpleDB.Query._ import org.sublime.amazon.simpleDB.Query._<console>:4: error: value Query is not a member of package org.sublime.amazon.simpleDB import org.sublime.amazon.simpleDB.Query._ ^
scala> import org.sublime.amazon.simpleDB.Query import org.sublime.amazon.simpleDB.Query
As you can see, my attempt to import the members of Query fails with "Query is not a member of package...", and yet my attempt to import Query itself succeeds, so there's clearly something there.
Am I missing something obvious here?
The full source of Query.scala is here: http://github.com/rbarooah/simpledb-scala-binding/tree/17cb3a8799d40e388a64f617296a81a9472ae3e3/src/main/scala/org/sublime/amazon/simpleDB/Query.scala

And you can reproduce the problem by doing:
git clone git://github.com/rbarooah/simpledb-scala-binding.git broken cd brokenmvn compile scala:console
And then attempting the import.
Please tell me it's code blindness and I've missed something obvious! Any insight gladly appreciated.
Thanks.
--
-Robin

Robin Barooah
http://www.sublime.org