Map.Entry not supported in queries?

Question

Hi,
I tried to run the following JDO query:
Query query = pm.newQuery(SomeClass.class);
query.setFilter("someMap.contains(entry) && entry.key == value");
query.setOrdering("entry.value ascending");
query.declareVariables("java.util.Map.Entry entry");
query.declareParameters("String value");
Object result = query.execute(someValue);
where someMap is an attribute of SomeClass which is of type java.util.Map
but I received the following exception:
kodo.util.UserException: The type "java.util.Map.Entry" as used in the
variable/parameter declarations could not be found in the imports.
     at kodo.query.AbstractQuery.bindClasses(AbstractQuery.java:1507)
     at kodo.query.AbstractQuery.bindVariables(AbstractQuery.java:1480)
     at kodo.query.AbstractQuery.internalCompile(AbstractQuery.java:501)
     at kodo.query.AbstractQuery.compileForParse(AbstractQuery.java:456)
     at kodo.query.AbstractQuery.getParameterTypes(AbstractQuery.java:1198)
I've also tried specify Map.Entry as "java.util.Map$Entry" and it also
doesn't work. Does it mean that Map.Entry or inner classes are not
supported in queries?
Someone please help,
Stephen

Answer 1

Stephen-
Map.Entry is not supported in queries (although you could conveivably
write a query extension that supports it).
Note that it does look like you can you the supported filter
"someMap.containsKey(keyParam)" (which would do the same thing as your
query "someMap.contains(entry) && entry.key == value").
In article <cc5jbq$c49$[email protected]>, Stephen Leung wrote:
Hi,
I tried to run the following JDO query:
Query query = pm.newQuery(SomeClass.class);
query.setFilter("someMap.contains(entry) && entry.key == value");
query.setOrdering("entry.value ascending");
query.declareVariables("java.util.Map.Entry entry");
query.declareParameters("String value");
Object result = query.execute(someValue);
where someMap is an attribute of SomeClass which is of type java.util.Map
but I received the following exception:
kodo.util.UserException: The type "java.util.Map.Entry" as used in the
variable/parameter declarations could not be found in the imports.
     at kodo.query.AbstractQuery.bindClasses(AbstractQuery.java:1507)
     at kodo.query.AbstractQuery.bindVariables(AbstractQuery.java:1480)
     at kodo.query.AbstractQuery.internalCompile(AbstractQuery.java:501)
     at kodo.query.AbstractQuery.compileForParse(AbstractQuery.java:456)
     at kodo.query.AbstractQuery.getParameterTypes(AbstractQuery.java:1198)
I've also tried specify Map.Entry as "java.util.Map$Entry" and it also
doesn't work. Does it mean that Map.Entry or inner classes are not
supported in queries?
Someone please help,
Stephen
Marc Prud'hommeaux
SolarMetric Inc.