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A Reactive Streams implementation of the MongoDB Java driver

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/*
 * Copyright 2008-present MongoDB, Inc.
 *
 * Licensed 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 com.mongodb.reactivestreams.client.internal;

import com.mongodb.client.cursor.TimeoutMode;
import com.mongodb.internal.TimeoutSettings;
import com.mongodb.internal.async.AsyncBatchCursor;
import com.mongodb.internal.operation.AsyncOperations;
import com.mongodb.internal.operation.AsyncReadOperation;
import com.mongodb.lang.Nullable;
import com.mongodb.reactivestreams.client.ClientSession;
import com.mongodb.reactivestreams.client.ListIndexesPublisher;
import org.bson.BsonString;
import org.bson.BsonValue;

import java.util.concurrent.TimeUnit;
import java.util.function.Function;

import static com.mongodb.assertions.Assertions.notNull;
import static java.util.concurrent.TimeUnit.MILLISECONDS;

final class ListIndexesPublisherImpl extends BatchCursorPublisher implements ListIndexesPublisher {

    private long maxTimeMS;
    private BsonValue comment;

    ListIndexesPublisherImpl(
            @Nullable final ClientSession clientSession,
            final MongoOperationPublisher mongoOperationPublisher) {
        super(clientSession, mongoOperationPublisher);
    }

    public ListIndexesPublisher maxTime(final long maxTime, final TimeUnit timeUnit) {
        notNull("timeUnit", timeUnit);
        this.maxTimeMS = MILLISECONDS.convert(maxTime, timeUnit);
        return this;
    }

    public ListIndexesPublisher batchSize(final int batchSize) {
        super.batchSize(batchSize);
        return this;
    }
    @Override
    public ListIndexesPublisher comment(@Nullable final String comment) {
        this.comment = comment != null ? new BsonString(comment) : null;
        return this;
    }

    @Override
    public ListIndexesPublisher comment(@Nullable final BsonValue comment) {
        this.comment = comment;
        return this;
    }

    @SuppressWarnings("ReactiveStreamsUnusedPublisher")
    @Override
    public ListIndexesPublisher timeoutMode(final TimeoutMode timeoutMode) {
        super.timeoutMode(timeoutMode);
        return this;
    }

    AsyncReadOperation> asAsyncReadOperation(final int initialBatchSize) {
        return getOperations().listIndexes(getDocumentClass(), initialBatchSize, comment, getTimeoutMode());
    }

    @Override
    Function, TimeoutSettings> getTimeoutSettings() {
        return (asyncOperations -> asyncOperations.createTimeoutSettings(maxTimeMS));
    }
}