[GitHub] [ignite] mrk-andreev commented on a change in pull request #8489: IGNITE-13714 [ML]: Add catboost inference integration

[GitBox <gi...@apache.org>]

mrk-andreev commented on a change in pull request #8489:
URL: https://github.com/apache/ignite/pull/8489#discussion_r660472816



##########
File path: modules/ml/catboost-model-parser/src/main/java/org/apache/ignite/ml/catboost/CatboostClassificationModel.java
##########
@@ -0,0 +1,73 @@
+/*
+ * 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.ignite.ml.catboost;
+
+import ai.catboost.CatBoostError;
+import ai.catboost.CatBoostModel;
+import org.apache.ignite.ml.inference.Model;
+import org.apache.ignite.ml.math.primitives.vector.NamedVector;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * CatboostClassificationModel imported and wrapped to be compatible with Apache Ignite infrastructure.
+ */
+public class CatboostClassificationModel implements Model<NamedVector, Double> {
+    /** Logger. */
+    private static final Logger logger = LoggerFactory.getLogger(CatboostClassificationModel.class);
+
+    /** Catboost model. */
+    private final CatBoostModel model;
+
+    /**
+     * Constructs a new instance of Catboost model wrapper.
+     *
+     * @param model Catboost Model
+     */
+    public CatboostClassificationModel(CatBoostModel model) {
+        this.model = model;
+    }
+
+    /** {@inheritDoc} */
+    @Override public Double predict(NamedVector input) {
+        float[] floatInput = new float[input.size()];
+        int index = 0;
+        for (String key: model.getFeatureNames()) {
+            floatInput[index] = (float) input.get(key);
+            index++;
+        }
+
+        try {
+            double predict = model.predict(floatInput, model.getFeatureNames())

Review comment:
       Hi, @saurzcode . I need more time for investigation. 




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