issue-673 fix

Author: redmitry

src/main/java/org/eclipse/yasson/internal/jsonstructure/JsonStructureToParserAdapter.java

@@ -103,6 +103,11 @@ public BigDecimal getBigDecimal() {
         return getJsonNumberValue().bigDecimalValue();
     }
 
+    @Override
+    public JsonValue getValue() {
+        return iterators.peek().getValue();
+    }
+
     @Override
     public JsonObject getObject() {
         JsonStructureIterator current = iterators.peek();
@@ -115,6 +120,11 @@ public JsonObject getObject() {
         }
     }
 
+    @Override
+    public JsonArray getArray() {
+        throw new UnsupportedOperationException();
+    }
+    
     private JsonNumber getJsonNumberValue() {
         JsonStructureIterator iterator = iterators.peek();
         JsonValue value = iterator.getValue();
@@ -123,7 +133,7 @@ private JsonNumber getJsonNumberValue() {
         }
         return (JsonNumber) value;
     }
-
+    
     @Override
     public JsonLocation getLocation() {
         throw new JsonbException("Operation not supported");