Extract YamlJsonTranslator from StandardYamlCoder

Refactored StandardYamlCoder, extracting a new class, YamlJsonTranslator,
from it.  This facilitates performing yaml translation when not using a
standard "gson" coder.
Added YamlJacksonHandler which supports YAML translation layered on
top of a JacksonHandler instead of a GsonMessageBodyHandler.
Also added junit tests to complete coverage of StandardCoder.
Also added public APPLICATION_YAML to YamlMessageBodyHandler.

Change-Id: Ia470fa194661fbf1aebeaf0f18b57f2a984cb64b
Issue-ID: POLICY-2081
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoder.java b/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoder.java
index d3d69812..c3f2d993 100644
--- a/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoder.java
+++ b/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoder.java
@@ -38,6 +38,8 @@ import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
 import java.nio.charset.StandardCharsets;
+import lombok.AccessLevel;
+import lombok.Getter;
 import org.onap.policy.common.gson.DoubleConverter;
 import org.onap.policy.common.gson.MapDoubleAdapterFactory;
 
@@ -49,6 +51,7 @@ public class StandardCoder implements Coder {
     /**
      * Gson object used to encode and decode messages.
      */
+    @Getter(AccessLevel.PROTECTED)
     private static final Gson GSON =
                     new GsonBuilder().registerTypeAdapter(StandardCoderObject.class, new StandardTypeAdapter())
                                     .registerTypeAdapterFactory(new MapDoubleAdapterFactory()).create();