List, Set, and OrderedSet in form should be handled as per jax-rs standard Look at page 12 In section 3.2 of the spec. See issue #195. This makes it work with CXF given that you have provided a jackson ParamConverter to CXF
jaxrs-extension: handle Collections as Lists in QueryParams and in FormParams
Allow keys of maps to be collections. Why we shouldn't? RestyGWT already allows arbitrary objects to be keys
preserve parameterized type argument information when a collection is used for keys of a map
Merge pull request #199 from BiovistaInc/allow-collections-as-keys-in-maps

Allow collections as keys in maps
Merge pull request #198 from BiovistaInc/jaxrs-extension-handle-collections-as-lists

jaxrs-extension: handle Collections as Lists in QueryParams and in FormParms
Merge pull request #197 from BiovistaInc/jaxrs-compliant-lists-as-formparameters

Handling QueryListTypes in Forms (resubmit)