[Solr] ResponseWriterで書き込んでみるJRuby版

a.rb

java_import Java::java.io.ByteArrayOutputStream
java_import Java::java.io.OutputStreamWriter
java_import Java::java.util.HashMap
java_import Java::org.apache.solr.common.SolrDocument
java_import Java::org.apache.solr.common.SolrDocumentList
java_import Java::org.apache.solr.common.params.SolrParams
java_import Java::org.apache.solr.common.util.NamedList
java_import Java::org.apache.solr.request.SolrQueryRequestBase
java_import Java::org.apache.solr.response.SolrQueryResponse
java_import Java::org.apache.solr.response.XMLResponseWriter

class MySolrQueryRequest < SolrQueryRequestBase; end
class MySolrParams < SolrParams
  def get param
    nil
  end
  def getParams param
    []
  end
  def getParameterNamesIterator
    HashMap.new.keySet.iterator
  end
end

# Request
req = MySolrQueryRequest.new nil, nil
req.setParams MySolrParams.new

# Response
rsp = SolrQueryResponse.new
rh = NamedList.new
rh.add "status", 0
rh.add "QTime", 0
rsp.add "responseHeader", rh
docList = SolrDocumentList.new
rsp.add "response", docList
doc = SolrDocument.new
doc.setField "poi_code", "G0438231113-001"
doc.setField "category1_code", ["M01"]
docList.add doc
docList.setNumFound 1
docList.setStart 0
docList.setMaxScore 1.3

# ResponseWriter
responseWriter = XMLResponseWriter.new
outputStream = ByteArrayOutputStream.new
writer = OutputStreamWriter.new outputStream

# write!
responseWriter.write writer, req, rsp
writer.flush
puts Java::java.lang.String.new outputStream.toByteArray, "utf-8"