Create StandardYamlCoder

Created StandardYamlCoder which is like a StandardCoder, except that
the original converts to/from JSON, while the new class converts to/from
YAML.  Also added YamlMessageBodyHandler and incorporated it into the
http server so that it supports a media type of */yaml.

Change-Id: Ibd83a9f6d355a330f63e435f2bb41affcf1947c2
Issue-ID: POLICY-2065
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 21 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 80eddb86..d3d69812 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
@@ -211,6 +211,16 @@ public class StandardCoder implements Coder {
     }
 
     /**
+     * Encodes an object into a json tree, without catching exceptions.
+     *
+     * @param object object to be encoded
+     * @return a json element representing the object
+     */
+    protected JsonElement toJsonTree(Object object) {
+        return GSON.toJsonTree(object);
+    }
+
+    /**
      * Encodes an object into json, without catching exceptions.
      *
      * @param object object to be encoded
@@ -232,6 +242,17 @@ public class StandardCoder implements Coder {
     }
 
     /**
+     * Decodes a json element into an object, without catching exceptions.
+     *
+     * @param json json element to be decoded
+     * @param clazz class of object to be decoded
+     * @return the object represented by the given json element
+     */
+    protected <T> T fromJson(JsonElement json, Class<T> clazz) {
+        return convertFromDouble(clazz, GSON.fromJson(json, clazz));
+    }
+
+    /**
      * Decodes a json string into an object, without catching exceptions.
      *
      * @param json json string to be decoded