exposed final fields of Pair for fast access. Pair is used quite a bit during serialization because of its use in ref stack.

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

@@ -84,8 +84,8 @@ abstract class JsonDeserializationVisitor<T> implements ObjectNavigator.Visitor
     if (element == null || element.isJsonNull()) {
       return null;
     }
-    Type objType = pair.getSecond().getType();
+    Type objType = pair.second.type;
-    return (pair.getFirst()).deserialize(element, objType, context);
+    return (pair.first).deserialize(element, objType, context);
   }
 
   final Object visitChildAsObject(Type childType, JsonElement jsonChild) {

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

@@ -179,8 +179,8 @@ final class JsonSerializationVisitor implements ObjectNavigator.Visitor {
     if (pair == null) {
       return null;
     }
-    JsonSerializer serializer = pair.getFirst();
+    JsonSerializer serializer = pair.first;
-    objTypePair = pair.getSecond();
+    objTypePair = pair.second;
     start(objTypePair);
     try {
       JsonElement element =

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

@@ -78,7 +78,7 @@ final class MemoryRefStack {
 
     for (ObjectTypePair stackObject : stack) {
       if (stackObject.getObject() == obj.getObject()
-          && stackObject.getType().equals(obj.getType()) ) {
+          && stackObject.type.equals(obj.type) ) {
         return true;
       }
     }

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

@@ -91,7 +91,7 @@ final class ObjectNavigator {
    * If a field is null, it does not get visited.
    */
   public void accept(Visitor visitor) {
-    TypeInfo objTypeInfo = new TypeInfo(objTypePair.getType());
+    TypeInfo objTypeInfo = new TypeInfo(objTypePair.type);
     if (exclusionStrategy.shouldSkipClass(objTypeInfo.getRawClass())) {
       return;
     }
@@ -106,7 +106,7 @@ final class ObjectNavigator {
       visitor.start(objTypePair);
       try {
         if (objTypeInfo.isArray()) {
-          visitor.visitArray(objectToVisit, objTypePair.getType());
+          visitor.visitArray(objectToVisit, objTypePair.type);
         } else if (objTypeInfo.getActualType() == Object.class
             && isPrimitiveOrString(objectToVisit)) {
           // TODO(Joel): this is only used for deserialization of "primitives"
@@ -116,7 +116,7 @@ final class ObjectNavigator {
         } else {
           visitor.startVisitingObject(objectToVisit);
           ObjectTypePair currObjTypePair = objTypePair.toMoreSpecificType();
-          Class<?> topLevelClass = new TypeInfo(currObjTypePair.getType()).getRawClass();
+          Class<?> topLevelClass = new TypeInfo(currObjTypePair.type).getRawClass();
           for (Class<?> curr = topLevelClass; curr != null && !curr.equals(Object.class);
               curr = curr.getSuperclass()) {
             if (!curr.isSynthetic()) {
@@ -145,7 +145,7 @@ final class ObjectNavigator {
           || exclusionStrategy.shouldSkipClass(fieldAttributes.getDeclaredClass())) {
         continue; // skip
       } else {
-        TypeInfo fieldTypeInfo = TypeInfoFactory.getTypeInfoForField(f, objTypePair.getType());
+        TypeInfo fieldTypeInfo = TypeInfoFactory.getTypeInfoForField(f, objTypePair.type);
         Type declaredTypeOfField = fieldTypeInfo.getActualType();
         boolean visitedWithCustomHandler =
             visitor.visitFieldUsingCustomHandler(f, declaredTypeOfField, obj);

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

@@ -24,7 +24,7 @@ import java.lang.reflect.Type;
  */
 final class ObjectTypePair {
   private Object obj;
-  private final Type type;
+  final Type type;
   private final boolean preserveType;
 
   ObjectTypePair(Object obj, Type type, boolean preserveType) {

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

@@ -17,19 +17,11 @@ package com.google.gson;
 
 final class Pair<FIRST, SECOND> {
 
-  private final FIRST first;
+  final FIRST first;
-  private final SECOND second;
+  final SECOND second;
 
   Pair(FIRST first, SECOND second) {
     this.first = first;
     this.second = second;
   }
-
-  public FIRST getFirst() {
-    return first;
-  }
-
-  public SECOND getSecond() {
-    return second;
-  }
 }

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

@@ -33,7 +33,7 @@ import java.lang.reflect.Field;
  *
  * @author Joel Leitch
  */
-class SerializedNameAnnotationInterceptingNamingPolicy implements FieldNamingStrategy {
+final class SerializedNameAnnotationInterceptingNamingPolicy implements FieldNamingStrategy {
   private static final JsonFieldNameValidator fieldNameValidator = new JsonFieldNameValidator();
   private final FieldNamingStrategy delegate;