"use strict";
// 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.
Object.defineProperty(exports, "__esModule", { value: true });
const stream_1 = require("stream");
const stream_2 = require("../../io/stream");
/** @ignore */
function recordBatchWriterThroughNodeStream(options) {
    return new RecordBatchWriterDuplex(new this(options));
}
exports.recordBatchWriterThroughNodeStream = recordBatchWriterThroughNodeStream;
/** @ignore */
class RecordBatchWriterDuplex extends stream_1.Duplex {
    constructor(writer, options) {
        super({ allowHalfOpen: false, ...options, writableObjectMode: true, readableObjectMode: false });
        this._pulling = false;
        this._writer = writer;
        this._reader = new stream_2.AsyncByteStream(writer);
    }
    _final(cb) {
        const writer = this._writer;
        writer && writer.close();
        cb && cb();
    }
    _write(x, _, cb) {
        const writer = this._writer;
        writer && writer.write(x);
        cb && cb();
        return true;
    }
    _read(size) {
        const it = this._reader;
        if (it && !this._pulling && (this._pulling = true)) {
            (async () => this._pulling = await this._pull(size, it))();
        }
    }
    _destroy(err, cb) {
        const writer = this._writer;
        if (writer) {
            err ? writer.abort(err) : writer.close();
        }
        cb(this._reader = this._writer = null);
    }
    async _pull(size, reader) {
        let r = null;
        while (this.readable && !(r = await reader.next(size || null)).done) {
            if (size != null && r.value) {
                size -= r.value.byteLength;
            }
            if (!this.push(r.value) || size <= 0) {
                break;
            }
        }
        if ((r && r.done || !this.readable)) {
            this.push(null);
            await reader.cancel();
        }
        return !this.readable;
    }
}

//# sourceMappingURL=writer.js.map