proper java to ruby conversions and specs

proper java to ruby convertion and specs

missing ruby conversions

add missing timestamp= method

added usec method

missing constants

added usec, tv_usec, year methods

clean ruby_to_hash_with_metadata method

rework boolean cast

add BigDecimal

missing import

reworked Ruby to JAva type conversion

better nil objects handling and better debug trace

logstash-core-event-java/spec/event_spec.rb

@@ -196,7 +196,41 @@ describe LogStash::Event do
     it "should warn on invalid timestamp object" do
       LogStash::Event.logger = logger
       expect(logger).to receive(:warn).once.with(/^Unrecognized/)
-      LogStash::Event.new(TIMESTAMP => Object.new)
+      LogStash::Event.new(TIMESTAMP => Array.new)
+    end
+  end
+
+  context "to_hash" do
+    let (:source_hash) {  {"a" => 1, "b" => [1, 2, 3, {"h" => 1, "i" => "baz"}], "c" => {"d" => "foo", "e" => "bar", "f" => [4, 5, "six"]}} }
+    let (:source_hash_with_matada) {  source_hash.merge({"@metadata" => {"a" => 1, "b" => 2}}) }
+    subject { LogStash::Event.new(source_hash_with_matada) }
+
+    it "should include @timestamp and @version" do
+      h = subject.to_hash
+      expect(h).to include("@timestamp")
+      expect(h).to include("@version")
+      expect(h).not_to include("@metadata")
+    end
+
+    it "should include @timestamp and @version and @metadata" do
+      h = subject.to_hash_with_metadata
+      expect(h).to include("@timestamp")
+      expect(h).to include("@version")
+      expect(h).to include("@metadata")
+    end
+
+    it "should produce valid deep Ruby hash without metadata" do
+      h = subject.to_hash
+      h.delete("@timestamp")
+      h.delete("@version")
+      expect(h).to eq(source_hash)
+    end
+
+    it "should produce valid deep Ruby hash with metadata" do
+      h = subject.to_hash_with_metadata
+      h.delete("@timestamp")
+      h.delete("@version")
+      expect(h).to eq(source_hash_with_matada)
     end
   end
 end