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diff --git a/src/main/java/org/apache/commons/math3/ml/neuralnet/sofm/KohonenTrainingTask.java b/src/main/java/org/apache/commons/math3/ml/neuralnet/sofm/KohonenTrainingTask.java
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+/*
+ * 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.commons.math3.ml.neuralnet.sofm;
+
+import java.util.Iterator;
+import org.apache.commons.math3.ml.neuralnet.Network;
+
+/**
+ * Trainer for Kohonen's Self-Organizing Map.
+ *
+ * @since 3.3
+ */
+public class KohonenTrainingTask implements Runnable {
+    /** SOFM to be trained. */
+    private final Network net;
+    /** Training data. */
+    private final Iterator<double[]> featuresIterator;
+    /** Update procedure. */
+    private final KohonenUpdateAction updateAction;
+
+    /**
+     * Creates a (sequential) trainer for the given network.
+     *
+     * @param net Network to be trained with the SOFM algorithm.
+     * @param featuresIterator Training data iterator.
+     * @param updateAction SOFM update procedure.
+     */
+    public KohonenTrainingTask(Network net,
+                               Iterator<double[]> featuresIterator,
+                               KohonenUpdateAction updateAction) {
+        this.net = net;
+        this.featuresIterator = featuresIterator;
+        this.updateAction = updateAction;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public void run() {
+        while (featuresIterator.hasNext()) {
+            updateAction.update(net, featuresIterator.next());
+        }
+    }
+}