weibozhao commented on a change in pull request #54:
URL: https://github.com/apache/flink-ml/pull/54#discussion_r823414741



##########
File path: 
flink-ml-lib/src/main/java/org/apache/flink/ml/feature/minmaxscaler/MinMaxScalerParams.java
##########
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+package org.apache.flink.ml.feature.minmaxscaler;
+
+import org.apache.flink.ml.common.param.HasFeaturesCol;
+import org.apache.flink.ml.common.param.HasOutputCol;
+import org.apache.flink.ml.param.DoubleParam;
+import org.apache.flink.ml.param.Param;
+import org.apache.flink.ml.param.ParamValidators;
+
+/**
+ * Params for {@link MinMaxScaler}.
+ *
+ * @param <T> The class type of this instance.
+ */
+public interface MinMaxScalerParams<T> extends HasFeaturesCol<T>, 
HasOutputCol<T> {
+    Param<Double> MAX =
+            new DoubleParam(
+                    "max", "Upper bound after transformation.", 1.0, 
ParamValidators.notNull());
+
+    default Double getMax() {
+        return get(MAX);
+    }
+
+    default T setMax(Double value) {
+        return set(MAX, value);
+    }
+
+    Param<Double> MIN =
+            new DoubleParam(
+                    "min", "Lower bound after transformation.", 0.0, 
ParamValidators.notNull());
+
+    default Double getMIN() {

Review comment:
       I define api as alink and spark.




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