Implemented some code review comments from r482

gson/src/main/java/com/google/gson/ExclusionStrategy.java

@@ -19,8 +19,8 @@ package com.google.gson;
 /**
  * A strategy (or policy) definition that is used to decide whether or not a field or top-level
  * class should be serialized or deserialized as part of the JSON output/input. For serialization,
- * if the {@link this#shouldSkipClass(Class)} method returns false then that class or field type
- * will not be part of the JSON output.  For deserialization, if {@link this#shouldSkipClass(Class)}
+ * if the {@link #shouldSkipClass(Class)} method returns false then that class or field type
+ * will not be part of the JSON output.  For deserialization, if {@link #shouldSkipClass(Class)}
  * returns false, then it will not be set as part of the Java object structure.
  *
  * <p>The following are a few examples that shows how you can use this exclusion mechanism.

gson/src/main/java/com/google/gson/FieldAttributes.java

@@ -90,7 +90,7 @@ final class FieldAttributes {
   }
 
   /**
-   * Return the {@link T} annotation object from this field if it exist; otherwise returns
+   * Return the T annotation object from this field if it exist; otherwise returns
    * {@code null}.
    *
    * @param annotation the class of the annotation that will be retrieved

gson/src/main/java/com/google/gson/Gson.java

@@ -202,7 +202,7 @@ public final class Gson {
     if (src == null) {
       return JsonNull.createJsonNull();
     }
-    return toJsonTree(src, src.getClass(), false);
+    return toJsonTree(src, src.getClass());
   }
 
   /**
@@ -222,16 +222,12 @@ public final class Gson {
    * @since 1.4
    */
   public JsonElement toJsonTree(Object src, Type typeOfSrc) {
-    return toJsonTree(src, typeOfSrc, true);
-  }
-
-  private JsonElement toJsonTree(Object src, Type typeOfSrc, boolean preserveType) {
     if (src == null) {
       return JsonNull.createJsonNull();
     }
     JsonSerializationContextDefault context = new JsonSerializationContextDefault(
         createDefaultObjectNavigatorFactory(serializationStrategy), serializeNulls, serializers);
-    return context.serialize(src, typeOfSrc, preserveType);
+    return context.serialize(src, typeOfSrc, true);
   }
 
   /**
@@ -251,7 +247,7 @@ public final class Gson {
     if (src == null) {
       return serializeNulls ? NULL_STRING : "";
     }
-    return toJson(src, src.getClass(), false);
+    return toJson(src, src.getClass());
   }
 
   /**
@@ -270,12 +266,8 @@ public final class Gson {
    * @return Json representation of {@code src}
    */
   public String toJson(Object src, Type typeOfSrc) {
-    return toJson(src, typeOfSrc, true);
-  }
-
-  private String toJson(Object src, Type typeOfSrc, boolean preserveType) {
     StringWriter writer = new StringWriter();
-    toJson(src, typeOfSrc, writer, preserveType);
+    toJson(src, typeOfSrc, writer);
     return writer.toString();
   }
 
@@ -295,7 +287,7 @@ public final class Gson {
   public void toJson(Object src, Appendable writer) {
     try {
       if (src != null) {
-        toJson(src, src.getClass(), writer, false);
+        toJson(src, src.getClass(), writer);
       } else if (serializeNulls) {
         writeOutNullString(writer);
       }
@@ -320,11 +312,7 @@ public final class Gson {
    * @since 1.2
    */
   public void toJson(Object src, Type typeOfSrc, Appendable writer) {
-    toJson(src, typeOfSrc, writer, true);
-  }
-
-  private void toJson(Object src, Type typeOfSrc, Appendable writer, boolean preserveType) {
-    JsonElement jsonElement = toJsonTree(src, typeOfSrc, preserveType);
+    JsonElement jsonElement = toJsonTree(src, typeOfSrc);
     toJson(jsonElement, writer);
   }
 

gson/src/main/java/com/google/gson/JsonDeserializationVisitor.java

@@ -98,8 +98,4 @@ abstract class JsonDeserializationVisitor<T> implements ObjectNavigator.Visitor
     // This happens primarily because of custom deserializers
     return childVisitor.getTarget();
   }
-
-  public ObjectTypePair getActualTypeIfMoreSpecific(ObjectTypePair objTypePair) {
-    return objTypePair;
-  }
 }

gson/src/main/java/com/google/gson/JsonSerializationContextDefault.java

@@ -42,7 +42,7 @@ final class JsonSerializationContextDefault implements JsonSerializationContext
     if (src == null) {
       return JsonNull.createJsonNull();
     }
-    return serialize(src, src.getClass(), false);
+    return serialize(src, src.getClass(), true);
   }
 
   public JsonElement serialize(Object src, Type typeOfSrc) {

gson/src/main/java/com/google/gson/JsonSerializationVisitor.java

@@ -236,8 +236,4 @@ final class JsonSerializationVisitor implements ObjectNavigator.Visitor {
   public JsonElement getJsonElement() {
     return root;
   }
-
-  public ObjectTypePair getActualTypeIfMoreSpecific(ObjectTypePair objTypePair) {
-    return objTypePair.toMoreSpecificType();
-  }
 }

gson/src/main/java/com/google/gson/ObjectNavigator.java

@@ -63,8 +63,6 @@ final class ObjectNavigator {
      */
     public boolean visitFieldUsingCustomHandler(Field f, Type actualTypeOfField, Object parent);
 
-    public ObjectTypePair getActualTypeIfMoreSpecific(ObjectTypePair objTypePair);
-
     /**
      * Retrieve the current target
      */
@@ -117,7 +115,7 @@ final class ObjectNavigator {
           objectToVisit = visitor.getTarget();
         } else {
           visitor.startVisitingObject(objectToVisit);
-          ObjectTypePair currObjTypePair = visitor.getActualTypeIfMoreSpecific(objTypePair);
+          ObjectTypePair currObjTypePair = objTypePair.toMoreSpecificType();
           Class<?> topLevelClass = new TypeInfo(currObjTypePair.getType()).getRawClass();
           for (Class<?> curr = topLevelClass; curr != null && !curr.equals(Object.class);
               curr = curr.getSuperclass()) {

gson/src/main/java/com/google/gson/ObjectTypePair.java

@@ -23,8 +23,6 @@ import java.lang.reflect.Type;
  * @author Inderjeet Singh
  */
 final class ObjectTypePair {
-  private static final int PRIME = 31;
-
   private final Object obj;
   private final Type type;
   private final boolean preserveType;
@@ -46,9 +44,7 @@ final class ObjectTypePair {
   @SuppressWarnings("unchecked")
   Pair<JsonSerializer, ObjectTypePair> getMatchingSerializer(
       ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers) {
-    if (obj == null) {
-      return null;
-    }
+    Preconditions.checkNotNull(obj);
     JsonSerializer serializer = null;
     if (!preserveType) {
       // First try looking up the serializer for the actual type
@@ -95,7 +91,7 @@ final class ObjectTypePair {
   public int hashCode() {
     // Not using type.hashCode() since I am not sure if the subclasses of type reimplement
     // hashCode() to be equal for equal types
-    return ((obj == null) ? PRIME : obj.hashCode());
+    return ((obj == null) ? 31 : obj.hashCode());
   }
 
   @Override

gson/src/test/java/com/google/gson/FieldAttributesTest.java

@@ -72,6 +72,7 @@ public class FieldAttributesTest extends TestCase {
   }
 
   private static class Foo {
+    @SuppressWarnings("unused")
     public transient List<String> bar;
   }
 }