modules/ml/src/main/java/org/apache/ignite/ml/dataset/impl/bootstrapping/BootstrappedDatasetPartition.java

/*
 * 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.dataset.impl.bootstrapping;

import java.util.Arrays;
import java.util.Iterator;
import org.jetbrains.annotations.NotNull;

/**
 * Partition of bootstrapped vectors.
 */
public class BootstrappedDatasetPartition implements AutoCloseable, Iterable<BootstrappedVector> {
    /** Vectors. */
    private final BootstrappedVector[] vectors;

    /**
     * Creates an instance of BootstrappedDatasetPartition.
     *
     * @param vectors Vectors.
     */
    public BootstrappedDatasetPartition(BootstrappedVector[] vectors) {
        this.vectors = vectors;
    }

    /**
     * Returns vector from dataset in according to row id.
     *
     * @param rowId Row id.
     * @return Vector.
     */
    public BootstrappedVector getRow(int rowId) {
        return vectors[rowId];
    }

    /**
     * Returns rows count.
     *
     * @return Rows count.
     */
    public int getRowsCount() {
        return vectors.length;
    }

    /** {@inheritDoc} */
    @NotNull @Override public Iterator<BootstrappedVector> iterator() {
        return Arrays.stream(vectors).iterator();
    }

    /** {@inheritDoc} */
    @Override public void close() {
        //NOP
    }
}