support fit and transform

[github-actions]

support fit and transform

incubator-wayang/wayang-commons/wayang-basic/src/main/java/org/apache/wayang/basic/operators/KMeansOperator.java

Line 49 in 8977978

// TODO support fit and transform

/*
 * 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.wayang.basic.operators;

import org.apache.wayang.basic.data.Tuple2;
import org.apache.wayang.core.api.Configuration;
import org.apache.wayang.core.optimizer.cardinality.CardinalityEstimator;
import org.apache.wayang.core.plan.wayangplan.UnaryToUnaryOperator;
import org.apache.wayang.core.types.DataSetType;

import java.util.Optional;

public class KMeansOperator extends UnaryToUnaryOperator<double[], Tuple2<double[], Integer>> {
    // TODO other parameters
    protected int k;

    public KMeansOperator(int k) {
        super(DataSetType.createDefaultUnchecked(double[].class),
                DataSetType.createDefaultUnchecked(Tuple2.class),
                false);
        this.k = k;
    }

    public KMeansOperator(KMeansOperator that) {
        super(that);
        this.k = that.k;
    }

    public int getK() {
        return k;
    }

    // TODO support fit and transform

    @Override
    public Optional<CardinalityEstimator> createCardinalityEstimator(int outputIndex, Configuration configuration) {
        // TODO
        return super.createCardinalityEstimator(outputIndex, configuration);
    }
}

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