cassandra-analytics-core/src/main/java/org/apache/cassandra/spark/data/BasicSupplier.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.cassandra.spark.data;

import java.util.Set;
import java.util.stream.Collectors;

import org.apache.cassandra.spark.reader.SparkSSTableReader;
import org.apache.cassandra.spark.utils.Throwing;
import org.jetbrains.annotations.NotNull;

public class BasicSupplier extends SSTablesSupplier
{
    private final Set<SSTable> ssTables;

    public BasicSupplier(@NotNull Set<SSTable> ssTables)
    {
        this.ssTables = ssTables;
    }

    @Override
    public <T extends SparkSSTableReader> Set<T> openAll(ReaderOpener<T> readerOpener)
    {
        return ssTables.stream()
                       .map(Throwing.function(ssTable -> readerOpener.openReader(ssTable, true)))
                       .filter(reader -> !reader.ignore())
                       .collect(Collectors.toSet());
    }
}