First, some interfaces are not supported:

• org.apache.lucene.search.BoostAttribute

• org.apache.lucene.search.FuzzyTermsEnum.LevenshteinAutomataAttribute

• org.apache.lucene.search.MaxNonCompetitiveBoostAttribute

• org.apache.lucene.analysis.NumericTokenStream.NumericTermAttribute

• org.apache.lucene.analysis.tokenattributes.PositionLengthAttribute

• org.apache.lucene.analysis.tokenattributes.TermToBytesRefAttribute

• org.apache.lucene.analysis.tokenattributes.BytesTermAttribute

Second, attributes implementing multiple interfaces are not supported, because the serializer assumes only one interface is implemented. This is the case of org.apache.lucene.analysis.tokenattributes.PackedTokenAttributeImpl for instance. We should make it possible for one attribute in Java to generate multiple attributes in the message.

And finally, polymorphism is being ignored. org.apache.lucene.collation.tokenattributes.CollatedTermAttributeImpl for instance extends org.apache.lucene.analysis.tokenattributes.CharTermAttributeImpl without implementing additional interfaces, but simply overrides a method. Simply solving the first two issue should solve the problem, though, provided every Attribute method is simply a getter.