Added evaluator factory framework

modules/prediction/evaluator/BUILD

 package(default_visibility = ["//visibility:public"])
 
+cc_library(
+    name = "evaluator_factory",
+    hdrs = ["evaluator_factory.h"],
+    deps = [
+        "//modules/prediction/evaluator:evaluator",
+        "//modules/common/util:factory",
+        "//modules/common:macro",
+    ]
+)
+
 cc_library(
     name = "evaluator_manager",
     srcs = ["evaluator_manager.cc"],
@@ -8,7 +18,7 @@ cc_library(
         "//modules/prediction/evaluator:evaluator",
         "//modules/perception/proto:perception_proto",
         "//modules/common:macro",
-        "@glog//:glog"
+        "@glog//:glog",
     ]
 )
 

modules/prediction/evaluator/evaluator_factory.h

+/******************************************************************************
+ * Copyright 2017 The Apollo Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *****************************************************************************/
+
+/**
+ * @file
+ * @brief Defines the evaluator factory
+ */
+
+#ifndef MODULES_PREDICTION_EVALUATOR_EVALUATOR_FACTORY_H_
+#define MODULES_PREDICTION_EVALUATOR_EVALUATOR_FACTORY_H_
+
+#include <memory>
+
+#include "modules/common/util/factory.h"
+#include "modules/common/macro.h"
+
+/**
+ * @namespace apollo::prediction
+ * @brief apollo::prediction
+ */
+
+class EvaluatorFactory
+    : public apollo::common::util::Factory<PredictionConf::Eval,
+                                           Evaluator> {
+ public:
+  /**
+   * @brief Register evaluators
+   */
+  void RegisterEvaluator();
+
+  /**
+   * @brief Create a pointer to an evaluator
+   * @param Evaluator name
+   * @return A pointer to the given evaluator
+   */
+  std::unique_ptr<Evaluator> CreateEvaluator(const PredictionConf::Eval& eval);
+
+ private:
+  DECLARE_SINGLETON(EvaluatorFactory);
+}
+
+#endif // MODULES_PREDICTION_EVALUATOR_EVALUATOR_FACTORY_H_
\ No newline at end of file