com.mongodb.reactivestreams.client.internal.GridFSDownloadStreamImpl Maven / Gradle / Ivy

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/*
 * Copyright 2016 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.Block;
import com.mongodb.async.SingleResultCallback;
import com.mongodb.client.gridfs.model.GridFSFile;
import com.mongodb.reactivestreams.client.Success;
import com.mongodb.reactivestreams.client.gridfs.GridFSDownloadStream;
import org.reactivestreams.Publisher;

import java.nio.ByteBuffer;

import static com.mongodb.assertions.Assertions.notNull;
import static com.mongodb.async.client.Observables.observe;
import static com.mongodb.reactivestreams.client.internal.PublisherHelper.voidToSuccessCallback;

final class GridFSDownloadStreamImpl implements GridFSDownloadStream {
    private final com.mongodb.async.client.gridfs.GridFSDownloadStream wrapped;

    GridFSDownloadStreamImpl(final com.mongodb.async.client.gridfs.GridFSDownloadStream wrapped) {
        this.wrapped = notNull("GridFSDownloadStream", wrapped);
    }

    @Override
    public Publisher getGridFSFile() {
        return new ObservableToPublisher(observe(new Block>() {
            @Override
            public void apply(final SingleResultCallback callback) {
                wrapped.getGridFSFile(callback);
            }
        }));
    }

    @Override
    public GridFSDownloadStream batchSize(final int batchSize) {
        wrapped.batchSize(batchSize);
        return this;
    }

    @Override
    public Publisher read(final ByteBuffer dst) {
        return new ObservableToPublisher(observe(new Block>() {
            @Override
            public void apply(final SingleResultCallback callback) {
                wrapped.read(dst, callback);
            }
        }));
    }

    @Override
    public Publisher close() {
        return new ObservableToPublisher(observe(new Block>() {
            @Override
            public void apply(final SingleResultCallback callback) {
                wrapped.close(voidToSuccessCallback(callback));
            }
        }));
    }
}