parquet-wasm/node/parquet_wasm.js

WebAssembly Parquet reader and writer.

let imports = {};
imports['__wbindgen_placeholder__'] = module.exports;

let cachedUint8ArrayMemory0 = null;

function getUint8ArrayMemory0() {
    if (cachedUint8ArrayMemory0 === null || cachedUint8ArrayMemory0.byteLength === 0) {
        cachedUint8ArrayMemory0 = new Uint8Array(wasm.memory.buffer);
    }
    return cachedUint8ArrayMemory0;
}

let cachedTextDecoder = new TextDecoder('utf-8', { ignoreBOM: true, fatal: true });

cachedTextDecoder.decode();

function decodeText(ptr, len) {
    return cachedTextDecoder.decode(getUint8ArrayMemory0().subarray(ptr, ptr + len));
}

function getStringFromWasm0(ptr, len) {
    ptr = ptr >>> 0;
    return decodeText(ptr, len);
}

let WASM_VECTOR_LEN = 0;

const cachedTextEncoder = new TextEncoder();

if (!('encodeInto' in cachedTextEncoder)) {
    cachedTextEncoder.encodeInto = function (arg, view) {
        const buf = cachedTextEncoder.encode(arg);
        view.set(buf);
        return {
            read: arg.length,
            written: buf.length
        };
    }
}

function passStringToWasm0(arg, malloc, realloc) {

    if (realloc === undefined) {
        const buf = cachedTextEncoder.encode(arg);
        const ptr = malloc(buf.length, 1) >>> 0;
        getUint8ArrayMemory0().subarray(ptr, ptr + buf.length).set(buf);
        WASM_VECTOR_LEN = buf.length;
        return ptr;
    }

    let len = arg.length;
    let ptr = malloc(len, 1) >>> 0;

    const mem = getUint8ArrayMemory0();

    let offset = 0;

    for (; offset < len; offset++) {
        const code = arg.charCodeAt(offset);
        if (code > 0x7F) break;
        mem[ptr + offset] = code;
    }

    if (offset !== len) {
        if (offset !== 0) {
            arg = arg.slice(offset);
        }
        ptr = realloc(ptr, len, len = offset + arg.length * 3, 1) >>> 0;
        const view = getUint8ArrayMemory0().subarray(ptr + offset, ptr + len);
        const ret = cachedTextEncoder.encodeInto(arg, view);

        offset += ret.written;
        ptr = realloc(ptr, len, offset, 1) >>> 0;
    }

    WASM_VECTOR_LEN = offset;
    return ptr;
}

let cachedDataViewMemory0 = null;

function getDataViewMemory0() {
    if (cachedDataViewMemory0 === null || cachedDataViewMemory0.buffer.detached === true || (cachedDataViewMemory0.buffer.detached === undefined && cachedDataViewMemory0.buffer !== wasm.memory.buffer)) {
        cachedDataViewMemory0 = new DataView(wasm.memory.buffer);
    }
    return cachedDataViewMemory0;
}

function addToExternrefTable0(obj) {
    const idx = wasm.__externref_table_alloc();
    wasm.__wbindgen_export_4.set(idx, obj);
    return idx;
}

function handleError(f, args) {
    try {
        return f.apply(this, args);
    } catch (e) {
        const idx = addToExternrefTable0(e);
        wasm.__wbindgen_exn_store(idx);
    }
}

function isLikeNone(x) {
    return x === undefined || x === null;
}

function getArrayU8FromWasm0(ptr, len) {
    ptr = ptr >>> 0;
    return getUint8ArrayMemory0().subarray(ptr / 1, ptr / 1 + len);
}

function debugString(val) {
    // primitive types
    const type = typeof val;
    if (type == 'number' || type == 'boolean' || val == null) {
        return  `${val}`;
    }
    if (type == 'string') {
        return `"${val}"`;
    }
    if (type == 'symbol') {
        const description = val.description;
        if (description == null) {
            return 'Symbol';
        } else {
            return `Symbol(${description})`;
        }
    }
    if (type == 'function') {
        const name = val.name;
        if (typeof name == 'string' && name.length > 0) {
            return `Function(${name})`;
        } else {
            return 'Function';
        }
    }
    // objects
    if (Array.isArray(val)) {
        const length = val.length;
        let debug = '[';
        if (length > 0) {
            debug += debugString(val[0]);
        }
        for(let i = 1; i < length; i++) {
            debug += ', ' + debugString(val[i]);
        }
        debug += ']';
        return debug;
    }
    // Test for built-in
    const builtInMatches = /\[object ([^\]]+)\]/.exec(toString.call(val));
    let className;
    if (builtInMatches && builtInMatches.length > 1) {
        className = builtInMatches[1];
    } else {
        // Failed to match the standard '[object ClassName]'
        return toString.call(val);
    }
    if (className == 'Object') {
        // we're a user defined class or Object
        // JSON.stringify avoids problems with cycles, and is generally much
        // easier than looping through ownProperties of `val`.
        try {
            return 'Object(' + JSON.stringify(val) + ')';
        } catch (_) {
            return 'Object';
        }
    }
    // errors
    if (val instanceof Error) {
        return `${val.name}: ${val.message}\n${val.stack}`;
    }
    // TODO we could test for more things here, like `Set`s and `Map`s.
    return className;
}

const CLOSURE_DTORS = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(
state => {
    wasm.__wbindgen_export_5.get(state.dtor)(state.a, state.b);
}
);

function makeMutClosure(arg0, arg1, dtor, f) {
    const state = { a: arg0, b: arg1, cnt: 1, dtor };
    const real = (...args) => {

        // First up with a closure we increment the internal reference
        // count. This ensures that the Rust closure environment won't
        // be deallocated while we're invoking it.
        state.cnt++;
        const a = state.a;
        state.a = 0;
        try {
            return f(a, state.b, ...args);
        } finally {
            if (--state.cnt === 0) {
                wasm.__wbindgen_export_5.get(state.dtor)(a, state.b);
                CLOSURE_DTORS.unregister(state);
            } else {
                state.a = a;
            }
        }
    };
    real.original = state;
    CLOSURE_DTORS.register(real, state, state);
    return real;
}

function takeFromExternrefTable0(idx) {
    const value = wasm.__wbindgen_export_4.get(idx);
    wasm.__externref_table_dealloc(idx);
    return value;
}

function getArrayJsValueFromWasm0(ptr, len) {
    ptr = ptr >>> 0;
    const mem = getDataViewMemory0();
    const result = [];
    for (let i = ptr; i < ptr + 4 * len; i += 4) {
        result.push(wasm.__wbindgen_export_4.get(mem.getUint32(i, true)));
    }
    wasm.__externref_drop_slice(ptr, len);
    return result;
}
/**
 * Read a Parquet file into a stream of Arrow `RecordBatch`es.
 *
 * This returns a ReadableStream containing RecordBatches in WebAssembly memory. To transfer the
 * Arrow table to JavaScript memory you have two options:
 *
 * - (Easier): Call {@linkcode RecordBatch.intoIPCStream} to construct a buffer that can be parsed
 *   with Arrow JS's `tableFromIPC` function. (The table will have a single internal record
 *   batch).
 * - (More performant but bleeding edge): Call {@linkcode RecordBatch.intoFFI} to construct a data
 *   representation that can be parsed zero-copy from WebAssembly with
 *   [arrow-js-ffi](https://github.com/kylebarron/arrow-js-ffi) using `parseRecordBatch`.
 *
 * Example with IPC stream:
 *
 * ```js
 * import { tableFromIPC, Table } from "apache-arrow";
 * import initWasm, {readParquetStream} from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 *
 * const stream = await readParquetStream(url);
 *
 * const batches = [];
 * for await (const wasmRecordBatch of stream) {
 *   const arrowTable = tableFromIPC(wasmRecordBatch.intoIPCStream());
 *   batches.push(...arrowTable.batches);
 * }
 * const table = new Table(batches);
 * ```
 *
 * Example with `arrow-js-ffi`:
 *
 * ```js
 * import { Table } from "apache-arrow";
 * import { parseRecordBatch } from "arrow-js-ffi";
 * import initWasm, {readParquetStream, wasmMemory} from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 * const WASM_MEMORY = wasmMemory();
 *
 * const stream = await readParquetStream(url);
 *
 * const batches = [];
 * for await (const wasmRecordBatch of stream) {
 *   const ffiRecordBatch = wasmRecordBatch.intoFFI();
 *   const recordBatch = parseRecordBatch(
 *     WASM_MEMORY.buffer,
 *     ffiRecordBatch.arrayAddr(),
 *     ffiRecordBatch.schemaAddr(),
 *     true
 *   );
 *   batches.push(recordBatch);
 * }
 * const table = new Table(batches);
 * ```
 *
 * @param url URL to Parquet file
 * @param {string} url
 * @param {number | null} [content_length]
 * @returns {Promise<ReadableStream>}
 */
exports.readParquetStream = function(url, content_length) {
    const ptr0 = passStringToWasm0(url, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
    const len0 = WASM_VECTOR_LEN;
    const ret = wasm.readParquetStream(ptr0, len0, isLikeNone(content_length) ? 0x100000001 : (content_length) >>> 0);
    return ret;
};

function _assertClass(instance, klass) {
    if (!(instance instanceof klass)) {
        throw new Error(`expected instance of ${klass.name}`);
    }
}
/**
 * Transform a ReadableStream of RecordBatches to a ReadableStream of bytes
 *
 * Browser example with piping to a file via the File System API:
 *
 * ```js
 * import initWasm, {ParquetFile, transformParquetStream} from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 *
 * const fileInstance = await ParquetFile.fromUrl("https://example.com/file.parquet");
 * const recordBatchStream = await fileInstance.stream();
 * const serializedParquetStream = await transformParquetStream(recordBatchStream);
 * // NB: requires transient user activation - you would typically do this before ☝️
 * const handle = await window.showSaveFilePicker();
 * const writable = await handle.createWritable();
 * await serializedParquetStream.pipeTo(writable);
 * ```
 *
 * NodeJS (ESM) example with piping to a file:
 * ```js
 * import { open } from "node:fs/promises";
 * import { Writable } from "node:stream";
 * import initWasm, {ParquetFile, transformParquetStream} from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 *
 * const fileInstance = await ParquetFile.fromUrl("https://example.com/file.parquet");
 * const recordBatchStream = await fileInstance.stream();
 * const serializedParquetStream = await transformParquetStream(recordBatchStream);
 *
 * // grab a file handle via fsPromises
 * const handle = await open("file.parquet");
 * const destinationStream = Writable.toWeb(handle.createWriteStream());
 * await serializedParquetStream.pipeTo(destinationStream);
 *
 * ```
 * NB: the above is a little contrived - `await writeFile("file.parquet", serializedParquetStream)`
 * is enough for most use cases.
 *
 * Browser kitchen sink example - teeing to the Cache API, using as a streaming post body, transferring
 * to a Web Worker:
 * ```js
 * // prelude elided - see above
 * const serializedParquetStream = await transformParquetStream(recordBatchStream);
 * const [cacheStream, bodyStream] = serializedParquetStream.tee();
 * const postProm = fetch(targetUrl, {
 *     method: "POST",
 *     duplex: "half",
 *     body: bodyStream
 * });
 * const targetCache = await caches.open("foobar");
 * await targetCache.put("https://example.com/file.parquet", new Response(cacheStream));
 * // this could have been done with another tee, but beware of buffering
 * const workerStream = await targetCache.get("https://example.com/file.parquet").body;
 * const worker = new Worker("worker.js");
 * worker.postMessage(workerStream, [workerStream]);
 * await postProm;
 * ```
 *
 * @param stream A {@linkcode ReadableStream} of {@linkcode RecordBatch} instances
 * @param writer_properties (optional) Configuration for writing to Parquet. Use the {@linkcode
 * WriterPropertiesBuilder} to build a writing configuration, then call `.build()` to create an
 * immutable writer properties to pass in here.
 * @returns ReadableStream containing serialized Parquet data.
 * @param {ReadableStream} stream
 * @param {WriterProperties | null} [writer_properties]
 * @returns {Promise<ReadableStream>}
 */
exports.transformParquetStream = function(stream, writer_properties) {
    let ptr0 = 0;
    if (!isLikeNone(writer_properties)) {
        _assertClass(writer_properties, WriterProperties);
        ptr0 = writer_properties.__destroy_into_raw();
    }
    const ret = wasm.transformParquetStream(stream, ptr0);
    return ret;
};

function passArray8ToWasm0(arg, malloc) {
    const ptr = malloc(arg.length * 1, 1) >>> 0;
    getUint8ArrayMemory0().set(arg, ptr / 1);
    WASM_VECTOR_LEN = arg.length;
    return ptr;
}
/**
 * Read a Parquet file into Arrow data.
 *
 * This returns an Arrow table in WebAssembly memory. To transfer the Arrow table to JavaScript
 * memory you have two options:
 *
 * - (Easier): Call {@linkcode Table.intoIPCStream} to construct a buffer that can be parsed with
 *   Arrow JS's `tableFromIPC` function.
 * - (More performant but bleeding edge): Call {@linkcode Table.intoFFI} to construct a data
 *   representation that can be parsed zero-copy from WebAssembly with
 *   [arrow-js-ffi](https://github.com/kylebarron/arrow-js-ffi) using `parseTable`.
 *
 * Example with IPC stream:
 *
 * ```js
 * import { tableFromIPC } from "apache-arrow";
 * import initWasm, {readParquet} from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 *
 * const resp = await fetch("https://example.com/file.parquet");
 * const parquetUint8Array = new Uint8Array(await resp.arrayBuffer());
 * const arrowWasmTable = readParquet(parquetUint8Array);
 * const arrowTable = tableFromIPC(arrowWasmTable.intoIPCStream());
 * ```
 *
 * Example with `arrow-js-ffi`:
 *
 * ```js
 * import { parseTable } from "arrow-js-ffi";
 * import initWasm, {readParquet, wasmMemory} from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 * const WASM_MEMORY = wasmMemory();
 *
 * const resp = await fetch("https://example.com/file.parquet");
 * const parquetUint8Array = new Uint8Array(await resp.arrayBuffer());
 * const arrowWasmTable = readParquet(parquetUint8Array);
 * const ffiTable = arrowWasmTable.intoFFI();
 * const arrowTable = parseTable(
 *   WASM_MEMORY.buffer,
 *   ffiTable.arrayAddrs(),
 *   ffiTable.schemaAddr()
 * );
 * ```
 *
 * @param parquet_file Uint8Array containing Parquet data
 * @param options
 *
 *    Options for reading Parquet data. Optional keys include:
 *
 *    - `batchSize`: The number of rows in each batch. If not provided, the upstream parquet
 *           default is 1024.
 *    - `rowGroups`: Only read data from the provided row group indexes.
 *    - `limit`: Provide a limit to the number of rows to be read.
 *    - `offset`: Provide an offset to skip over the given number of rows.
 *    - `columns`: The column names from the file to read.
 * @param {Uint8Array} parquet_file
 * @param {ReaderOptions | null} [options]
 * @returns {Table}
 */
exports.readParquet = function(parquet_file, options) {
    const ptr0 = passArray8ToWasm0(parquet_file, wasm.__wbindgen_malloc);
    const len0 = WASM_VECTOR_LEN;
    const ret = wasm.readParquet(ptr0, len0, isLikeNone(options) ? 0 : addToExternrefTable0(options));
    if (ret[2]) {
        throw takeFromExternrefTable0(ret[1]);
    }
    return Table.__wrap(ret[0]);
};

/**
 * Read an Arrow schema from a Parquet file in memory.
 *
 * This returns an Arrow schema in WebAssembly memory. To transfer the Arrow schema to JavaScript
 * memory you have two options:
 *
 * - (Easier): Call {@linkcode Schema.intoIPCStream} to construct a buffer that can be parsed with
 *   Arrow JS's `tableFromIPC` function. This results in an Arrow JS Table with zero rows but a
 *   valid schema.
 * - (More performant but bleeding edge): Call {@linkcode Schema.intoFFI} to construct a data
 *   representation that can be parsed zero-copy from WebAssembly with
 *   [arrow-js-ffi](https://github.com/kylebarron/arrow-js-ffi) using `parseSchema`.
 *
 * Example with IPC Stream:
 *
 * ```js
 * import { tableFromIPC } from "apache-arrow";
 * import initWasm, {readSchema} from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 *
 * const resp = await fetch("https://example.com/file.parquet");
 * const parquetUint8Array = new Uint8Array(await resp.arrayBuffer());
 * const arrowWasmSchema = readSchema(parquetUint8Array);
 * const arrowTable = tableFromIPC(arrowWasmSchema.intoIPCStream());
 * const arrowSchema = arrowTable.schema;
 * ```
 *
 * Example with `arrow-js-ffi`:
 *
 * ```js
 * import { parseSchema } from "arrow-js-ffi";
 * import initWasm, {readSchema, wasmMemory} from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 * const WASM_MEMORY = wasmMemory();
 *
 * const resp = await fetch("https://example.com/file.parquet");
 * const parquetUint8Array = new Uint8Array(await resp.arrayBuffer());
 * const arrowWasmSchema = readSchema(parquetUint8Array);
 * const ffiSchema = arrowWasmSchema.intoFFI();
 * const arrowTable = parseSchema(WASM_MEMORY.buffer, ffiSchema.addr());
 * const arrowSchema = arrowTable.schema;
 * ```
 *
 * @param parquet_file Uint8Array containing Parquet data
 * @param {Uint8Array} parquet_file
 * @returns {Schema}
 */
exports.readSchema = function(parquet_file) {
    const ptr0 = passArray8ToWasm0(parquet_file, wasm.__wbindgen_malloc);
    const len0 = WASM_VECTOR_LEN;
    const ret = wasm.readSchema(ptr0, len0);
    if (ret[2]) {
        throw takeFromExternrefTable0(ret[1]);
    }
    return Schema.__wrap(ret[0]);
};

/**
 * Write Arrow data to a Parquet file.
 *
 * For example, to create a Parquet file with Snappy compression:
 *
 * ```js
 * import { tableToIPC } from "apache-arrow";
 * // Edit the `parquet-wasm` import as necessary
 * import initWasm, {
 *   Table,
 *   WriterPropertiesBuilder,
 *   Compression,
 *   writeParquet,
 * } from "parquet-wasm";
 *
 * // Instantiate the WebAssembly context
 * await initWasm();
 *
 * // Given an existing arrow JS table under `table`
 * const wasmTable = Table.fromIPCStream(tableToIPC(table, "stream"));
 * const writerProperties = new WriterPropertiesBuilder()
 *   .setCompression(Compression.SNAPPY)
 *   .build();
 * const parquetUint8Array = writeParquet(wasmTable, writerProperties);
 * ```
 *
 * If `writerProperties` is not provided or is `null`, the default writer properties will be used.
 * This is equivalent to `new WriterPropertiesBuilder().build()`.
 *
 * @param table A {@linkcode Table} representation in WebAssembly memory.
 * @param writer_properties (optional) Configuration for writing to Parquet. Use the {@linkcode
 * WriterPropertiesBuilder} to build a writing configuration, then call `.build()` to create an
 * immutable writer properties to pass in here.
 * @returns Uint8Array containing written Parquet data.
 * @param {Table} table
 * @param {WriterProperties | null} [writer_properties]
 * @returns {Uint8Array}
 */
exports.writeParquet = function(table, writer_properties) {
    _assertClass(table, Table);
    var ptr0 = table.__destroy_into_raw();
    let ptr1 = 0;
    if (!isLikeNone(writer_properties)) {
        _assertClass(writer_properties, WriterProperties);
        ptr1 = writer_properties.__destroy_into_raw();
    }
    const ret = wasm.writeParquet(ptr0, ptr1);
    if (ret[3]) {
        throw takeFromExternrefTable0(ret[2]);
    }
    var v3 = getArrayU8FromWasm0(ret[0], ret[1]).slice();
    wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
    return v3;
};

/**
 * Returns a handle to this wasm instance's `WebAssembly.Table` which is the indirect function
 * table used by Rust
 * @returns {FunctionTable}
 */
exports._functionTable = function() {
    const ret = wasm._functionTable();
    return ret;
};

/**
 * Returns a handle to this wasm instance's `WebAssembly.Memory`
 * @returns {Memory}
 */
exports.wasmMemory = function() {
    const ret = wasm.wasmMemory();
    return ret;
};

let cachedUint32ArrayMemory0 = null;

function getUint32ArrayMemory0() {
    if (cachedUint32ArrayMemory0 === null || cachedUint32ArrayMemory0.byteLength === 0) {
        cachedUint32ArrayMemory0 = new Uint32Array(wasm.memory.buffer);
    }
    return cachedUint32ArrayMemory0;
}

function getArrayU32FromWasm0(ptr, len) {
    ptr = ptr >>> 0;
    return getUint32ArrayMemory0().subarray(ptr / 4, ptr / 4 + len);
}
function __wbg_adapter_8(arg0, arg1, arg2) {
    wasm.closure3806_externref_shim(arg0, arg1, arg2);
}

function __wbg_adapter_15(arg0, arg1) {
    wasm.wasm_bindgen__convert__closures_____invoke__h7767827484ad8911(arg0, arg1);
}

function __wbg_adapter_266(arg0, arg1, arg2, arg3) {
    wasm.closure3830_externref_shim(arg0, arg1, arg2, arg3);
}

/**
 * Supported compression algorithms.
 *
 * Codecs added in format version X.Y can be read by readers based on X.Y and later.
 * Codec support may vary between readers based on the format version and
 * libraries available at runtime.
 * @enum {0 | 1 | 2 | 3 | 4 | 5 | 6 | 7}
 */
exports.Compression = Object.freeze({
    UNCOMPRESSED: 0, "0": "UNCOMPRESSED",
    SNAPPY: 1, "1": "SNAPPY",
    GZIP: 2, "2": "GZIP",
    BROTLI: 3, "3": "BROTLI",
    /**
     * @deprecated as of Parquet 2.9.0.
     * Switch to LZ4_RAW
     */
    LZ4: 4, "4": "LZ4",
    ZSTD: 5, "5": "ZSTD",
    LZ4_RAW: 6, "6": "LZ4_RAW",
    LZO: 7, "7": "LZO",
});
/**
 * Controls the level of statistics to be computed by the writer
 * @enum {0 | 1 | 2}
 */
exports.EnabledStatistics = Object.freeze({
    /**
     * Compute no statistics
     */
    None: 0, "0": "None",
    /**
     * Compute chunk-level statistics but not page-level
     */
    Chunk: 1, "1": "Chunk",
    /**
     * Compute page-level and chunk-level statistics
     */
    Page: 2, "2": "Page",
});
/**
 * Encodings supported by Parquet.
 * Not all encodings are valid for all types. These enums are also used to specify the
 * encoding of definition and repetition levels.
 * @enum {0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8}
 */
exports.Encoding = Object.freeze({
    /**
     * Default byte encoding.
     * - BOOLEAN - 1 bit per value, 0 is false; 1 is true.
     * - INT32 - 4 bytes per value, stored as little-endian.
     * - INT64 - 8 bytes per value, stored as little-endian.
     * - FLOAT - 4 bytes per value, stored as little-endian.
     * - DOUBLE - 8 bytes per value, stored as little-endian.
     * - BYTE_ARRAY - 4 byte length stored as little endian, followed by bytes.
     * - FIXED_LEN_BYTE_ARRAY - just the bytes are stored.
     */
    PLAIN: 0, "0": "PLAIN",
    /**
     * **Deprecated** dictionary encoding.
     *
     * The values in the dictionary are encoded using PLAIN encoding.
     * Since it is deprecated, RLE_DICTIONARY encoding is used for a data page, and
     * PLAIN encoding is used for dictionary page.
     */
    PLAIN_DICTIONARY: 1, "1": "PLAIN_DICTIONARY",
    /**
     * Group packed run length encoding.
     *
     * Usable for definition/repetition levels encoding and boolean values.
     */
    RLE: 2, "2": "RLE",
    /**
     * Bit packed encoding.
     *
     * This can only be used if the data has a known max width.
     * Usable for definition/repetition levels encoding.
     */
    BIT_PACKED: 3, "3": "BIT_PACKED",
    /**
     * Delta encoding for integers, either INT32 or INT64.
     *
     * Works best on sorted data.
     */
    DELTA_BINARY_PACKED: 4, "4": "DELTA_BINARY_PACKED",
    /**
     * Encoding for byte arrays to separate the length values and the data.
     *
     * The lengths are encoded using DELTA_BINARY_PACKED encoding.
     */
    DELTA_LENGTH_BYTE_ARRAY: 5, "5": "DELTA_LENGTH_BYTE_ARRAY",
    /**
     * Incremental encoding for byte arrays.
     *
     * Prefix lengths are encoded using DELTA_BINARY_PACKED encoding.
     * Suffixes are stored using DELTA_LENGTH_BYTE_ARRAY encoding.
     */
    DELTA_BYTE_ARRAY: 6, "6": "DELTA_BYTE_ARRAY",
    /**
     * Dictionary encoding.
     *
     * The ids are encoded using the RLE encoding.
     */
    RLE_DICTIONARY: 7, "7": "RLE_DICTIONARY",
    /**
     * Encoding for floating-point data.
     *
     * K byte-streams are created where K is the size in bytes of the data type.
     * The individual bytes of an FP value are scattered to the corresponding stream and
     * the streams are concatenated.
     * This itself does not reduce the size of the data but can lead to better compression
     * afterwards.
     */
    BYTE_STREAM_SPLIT: 8, "8": "BYTE_STREAM_SPLIT",
});
/**
 * The Parquet version to use when writing
 * @enum {0 | 1}
 */
exports.WriterVersion = Object.freeze({
    V1: 0, "0": "V1",
    V2: 1, "1": "V2",
});

const __wbindgen_enum_ReadableStreamType = ["bytes"];

const __wbindgen_enum_RequestCache = ["default", "no-store", "reload", "no-cache", "force-cache", "only-if-cached"];

const __wbindgen_enum_RequestCredentials = ["omit", "same-origin", "include"];

const __wbindgen_enum_RequestMode = ["same-origin", "no-cors", "cors", "navigate"];

const ColumnChunkMetaDataFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_columnchunkmetadata_free(ptr >>> 0, 1));
/**
 * Metadata for a Parquet column chunk.
 */
class ColumnChunkMetaData {

    static __wrap(ptr) {
        ptr = ptr >>> 0;
        const obj = Object.create(ColumnChunkMetaData.prototype);
        obj.__wbg_ptr = ptr;
        ColumnChunkMetaDataFinalization.register(obj, obj.__wbg_ptr, obj);
        return obj;
    }

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        ColumnChunkMetaDataFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_columnchunkmetadata_free(ptr, 0);
    }
    /**
     * Total number of values in this column chunk.
     * @returns {number}
     */
    numValues() {
        const ret = wasm.columnchunkmetadata_numValues(this.__wbg_ptr);
        return ret;
    }
    /**
     * Path (or identifier) of this column.
     * @returns {string[]}
     */
    columnPath() {
        const ret = wasm.columnchunkmetadata_columnPath(this.__wbg_ptr);
        var v1 = getArrayJsValueFromWasm0(ret[0], ret[1]).slice();
        wasm.__wbindgen_free(ret[0], ret[1] * 4, 4);
        return v1;
    }
    /**
     * Compression for this column.
     * @returns {Compression}
     */
    compression() {
        const ret = wasm.columnchunkmetadata_compression(this.__wbg_ptr);
        return ret;
    }
    /**
     * Byte offset in `file_path()`.
     * @returns {bigint}
     */
    fileOffset() {
        const ret = wasm.columnchunkmetadata_fileOffset(this.__wbg_ptr);
        return ret;
    }
    /**
     * Returns the total compressed data size of this column chunk.
     * @returns {number}
     */
    compressedSize() {
        const ret = wasm.columnchunkmetadata_compressedSize(this.__wbg_ptr);
        return ret;
    }
    /**
     * Returns the total uncompressed data size of this column chunk.
     * @returns {number}
     */
    uncompressedSize() {
        const ret = wasm.columnchunkmetadata_uncompressedSize(this.__wbg_ptr);
        return ret;
    }
    /**
     * All encodings used for this column.
     * @returns {any[]}
     */
    encodings() {
        const ret = wasm.columnchunkmetadata_encodings(this.__wbg_ptr);
        var v1 = getArrayJsValueFromWasm0(ret[0], ret[1]).slice();
        wasm.__wbindgen_free(ret[0], ret[1] * 4, 4);
        return v1;
    }
    /**
     * File where the column chunk is stored.
     *
     * If not set, assumed to belong to the same file as the metadata.
     * This path is relative to the current file.
     * @returns {string | undefined}
     */
    filePath() {
        const ret = wasm.columnchunkmetadata_filePath(this.__wbg_ptr);
        let v1;
        if (ret[0] !== 0) {
            v1 = getStringFromWasm0(ret[0], ret[1]).slice();
            wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
        }
        return v1;
    }
}
if (Symbol.dispose) ColumnChunkMetaData.prototype[Symbol.dispose] = ColumnChunkMetaData.prototype.free;

exports.ColumnChunkMetaData = ColumnChunkMetaData;

const FFIDataFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_ffidata_free(ptr >>> 0, 1));
/**
 * An Arrow array exported to FFI.
 *
 * Using [`arrow-js-ffi`](https://github.com/kylebarron/arrow-js-ffi), you can view or copy Arrow
 * these objects to JavaScript.
 *
 * Note that this also includes an ArrowSchema C struct as well, so that extension type
 * information can be maintained.
 * ## Memory management
 *
 * Note that this array will not be released automatically. You need to manually call `.free()` to
 * release memory.
 */
class FFIData {

    static __wrap(ptr) {
        ptr = ptr >>> 0;
        const obj = Object.create(FFIData.prototype);
        obj.__wbg_ptr = ptr;
        FFIDataFinalization.register(obj, obj.__wbg_ptr, obj);
        return obj;
    }

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        FFIDataFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_ffidata_free(ptr, 0);
    }
    /**
     * Access the pointer to the
     * [`ArrowArray`](https://arrow.apache.org/docs/format/CDataInterface.html#structure-definitions)
     * struct. This can be viewed or copied (without serialization) to an Arrow JS `RecordBatch` by
     * using [`arrow-js-ffi`](https://github.com/kylebarron/arrow-js-ffi). You can access the
     * [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/WebAssembly/JavaScript_interface/Memory)
     * instance by using {@linkcode wasmMemory}.
     *
     * **Example**:
     *
     * ```ts
     * import { parseRecordBatch } from "arrow-js-ffi";
     *
     * const wasmRecordBatch: FFIRecordBatch = ...
     * const wasmMemory: WebAssembly.Memory = wasmMemory();
     *
     * // Pass `true` to copy arrays across the boundary instead of creating views.
     * const jsRecordBatch = parseRecordBatch(
     *   wasmMemory.buffer,
     *   wasmRecordBatch.arrayAddr(),
     *   wasmRecordBatch.schemaAddr(),
     *   true
     * );
     * ```
     * @returns {number}
     */
    arrayAddr() {
        const ret = wasm.ffidata_arrayAddr(this.__wbg_ptr);
        return ret >>> 0;
    }
    /**
     * Access the pointer to the
     * [`ArrowSchema`](https://arrow.apache.org/docs/format/CDataInterface.html#structure-definitions)
     * struct. This can be viewed or copied (without serialization) to an Arrow JS `Field` by
     * using [`arrow-js-ffi`](https://github.com/kylebarron/arrow-js-ffi). You can access the
     * [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/WebAssembly/JavaScript_interface/Memory)
     * instance by using {@linkcode wasmMemory}.
     *
     * **Example**:
     *
     * ```ts
     * import { parseRecordBatch } from "arrow-js-ffi";
     *
     * const wasmRecordBatch: FFIRecordBatch = ...
     * const wasmMemory: WebAssembly.Memory = wasmMemory();
     *
     * // Pass `true` to copy arrays across the boundary instead of creating views.
     * const jsRecordBatch = parseRecordBatch(
     *   wasmMemory.buffer,
     *   wasmRecordBatch.arrayAddr(),
     *   wasmRecordBatch.schemaAddr(),
     *   true
     * );
     * ```
     * @returns {number}
     */
    schemaAddr() {
        const ret = wasm.ffidata_schemaAddr(this.__wbg_ptr);
        return ret >>> 0;
    }
}
if (Symbol.dispose) FFIData.prototype[Symbol.dispose] = FFIData.prototype.free;

exports.FFIData = FFIData;

const FFISchemaFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_ffischema_free(ptr >>> 0, 1));

class FFISchema {

    static __wrap(ptr) {
        ptr = ptr >>> 0;
        const obj = Object.create(FFISchema.prototype);
        obj.__wbg_ptr = ptr;
        FFISchemaFinalization.register(obj, obj.__wbg_ptr, obj);
        return obj;
    }

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        FFISchemaFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_ffischema_free(ptr, 0);
    }
    /**
     * Access the pointer to the
     * [`ArrowSchema`](https://arrow.apache.org/docs/format/CDataInterface.html#structure-definitions)
     * struct. This can be viewed or copied (without serialization) to an Arrow JS `Field` by
     * using [`arrow-js-ffi`](https://github.com/kylebarron/arrow-js-ffi). You can access the
     * [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/WebAssembly/JavaScript_interface/Memory)
     * instance by using {@linkcode wasmMemory}.
     *
     * **Example**:
     *
     * ```ts
     * import { parseRecordBatch } from "arrow-js-ffi";
     *
     * const wasmRecordBatch: FFIRecordBatch = ...
     * const wasmMemory: WebAssembly.Memory = wasmMemory();
     *
     * // Pass `true` to copy arrays across the boundary instead of creating views.
     * const jsRecordBatch = parseRecordBatch(
     *   wasmMemory.buffer,
     *   wasmRecordBatch.arrayAddr(),
     *   wasmRecordBatch.schemaAddr(),
     *   true
     * );
     * ```
     * @returns {number}
     */
    addr() {
        const ret = wasm.ffischema_addr(this.__wbg_ptr);
        return ret >>> 0;
    }
}
if (Symbol.dispose) FFISchema.prototype[Symbol.dispose] = FFISchema.prototype.free;

exports.FFISchema = FFISchema;

const FFIStreamFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_ffistream_free(ptr >>> 0, 1));
/**
 * A representation of an Arrow C Stream in WebAssembly memory exposed as FFI-compatible
 * structs through the Arrow C Data Interface.
 *
 * Unlike other Arrow implementations outside of JS, this always stores the "stream" fully
 * materialized as a sequence of Arrow chunks.
 */
class FFIStream {

    static __wrap(ptr) {
        ptr = ptr >>> 0;
        const obj = Object.create(FFIStream.prototype);
        obj.__wbg_ptr = ptr;
        FFIStreamFinalization.register(obj, obj.__wbg_ptr, obj);
        return obj;
    }

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        FFIStreamFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_ffistream_free(ptr, 0);
    }
    /**
     * Get the pointer to one ArrowArray FFI struct for a given chunk index and column index
     *
     * Access the pointer to one
     * [`ArrowArray`](https://arrow.apache.org/docs/format/CDataInterface.html#structure-definitions)
     * struct representing one of the internal `RecordBatch`es. This can be viewed or copied (without serialization) to an Arrow JS `RecordBatch` by
     * using [`arrow-js-ffi`](https://github.com/kylebarron/arrow-js-ffi). You can access the
     * [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/WebAssembly/JavaScript_interface/Memory)
     * instance by using {@linkcode wasmMemory}.
     *
     * **Example**:
     *
     * ```ts
     * import * as arrow from "apache-arrow";
     * import { parseRecordBatch } from "arrow-js-ffi";
     *
     * const wasmTable: FFITable = ...
     * const wasmMemory: WebAssembly.Memory = wasmMemory();
     *
     * const jsBatches: arrow.RecordBatch[] = []
     * for (let i = 0; i < wasmTable.numBatches(); i++) {
     *   // Pass `true` to copy arrays across the boundary instead of creating views.
     *   const jsRecordBatch = parseRecordBatch(
     *     wasmMemory.buffer,
     *     wasmTable.arrayAddr(i),
     *     wasmTable.schemaAddr(),
     *     true
     *   );
     *   jsBatches.push(jsRecordBatch);
     * }
     * const jsTable = new arrow.Table(jsBatches);
     * ```
     *
     * @param chunk number The chunk index to use
     * @returns number pointer to an ArrowArray FFI struct in Wasm memory
     * @param {number} chunk
     * @returns {number}
     */
    arrayAddr(chunk) {
        const ret = wasm.ffistream_arrayAddr(this.__wbg_ptr, chunk);
        return ret >>> 0;
    }
    /**
     * Get the total number of elements in this stream
     * @returns {number}
     */
    numArrays() {
        const ret = wasm.ffistream_numArrays(this.__wbg_ptr);
        return ret >>> 0;
    }
    /**
     * @returns {Uint32Array}
     */
    arrayAddrs() {
        const ret = wasm.ffistream_arrayAddrs(this.__wbg_ptr);
        var v1 = getArrayU32FromWasm0(ret[0], ret[1]).slice();
        wasm.__wbindgen_free(ret[0], ret[1] * 4, 4);
        return v1;
    }
    /**
     * Get the pointer to the ArrowSchema FFI struct
     * @returns {number}
     */
    schemaAddr() {
        const ret = wasm.ffistream_schemaAddr(this.__wbg_ptr);
        return ret >>> 0;
    }
    drop() {
        const ptr = this.__destroy_into_raw();
        wasm.ffistream_drop(ptr);
    }
}
if (Symbol.dispose) FFIStream.prototype[Symbol.dispose] = FFIStream.prototype.free;

exports.FFIStream = FFIStream;

const FileMetaDataFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_filemetadata_free(ptr >>> 0, 1));
/**
 * Metadata for a Parquet file.
 */
class FileMetaData {

    static __wrap(ptr) {
        ptr = ptr >>> 0;
        const obj = Object.create(FileMetaData.prototype);
        obj.__wbg_ptr = ptr;
        FileMetaDataFinalization.register(obj, obj.__wbg_ptr, obj);
        return obj;
    }

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        FileMetaDataFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_filemetadata_free(ptr, 0);
    }
    /**
     * String message for application that wrote this file.
     *
     * This should have the following format:
     * `<application> version <application version> (build <application build hash>)`.
     *
     * ```shell
     * parquet-mr version 1.8.0 (build 0fda28af84b9746396014ad6a415b90592a98b3b)
     * ```
     * @returns {string | undefined}
     */
    createdBy() {
        const ret = wasm.filemetadata_createdBy(this.__wbg_ptr);
        let v1;
        if (ret[0] !== 0) {
            v1 = getStringFromWasm0(ret[0], ret[1]).slice();
            wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
        }
        return v1;
    }
    /**
     * Returns key_value_metadata of this file.
     * @returns {Map<any, any>}
     */
    keyValueMetadata() {
        const ret = wasm.filemetadata_keyValueMetadata(this.__wbg_ptr);
        if (ret[2]) {
            throw takeFromExternrefTable0(ret[1]);
        }
        return takeFromExternrefTable0(ret[0]);
    }
    /**
     * Returns version of this file.
     * @returns {number}
     */
    version() {
        const ret = wasm.filemetadata_version(this.__wbg_ptr);
        return ret;
    }
    /**
     * Returns number of rows in the file.
     * @returns {number}
     */
    numRows() {
        const ret = wasm.filemetadata_numRows(this.__wbg_ptr);
        return ret;
    }
}
if (Symbol.dispose) FileMetaData.prototype[Symbol.dispose] = FileMetaData.prototype.free;

exports.FileMetaData = FileMetaData;

const IntoUnderlyingByteSourceFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_intounderlyingbytesource_free(ptr >>> 0, 1));

class IntoUnderlyingByteSource {

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        IntoUnderlyingByteSourceFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_intounderlyingbytesource_free(ptr, 0);
    }
    /**
     * @returns {number}
     */
    get autoAllocateChunkSize() {
        const ret = wasm.intounderlyingbytesource_autoAllocateChunkSize(this.__wbg_ptr);
        return ret >>> 0;
    }
    /**
     * @param {ReadableByteStreamController} controller
     * @returns {Promise<any>}
     */
    pull(controller) {
        const ret = wasm.intounderlyingbytesource_pull(this.__wbg_ptr, controller);
        return ret;
    }
    /**
     * @param {ReadableByteStreamController} controller
     */
    start(controller) {
        wasm.intounderlyingbytesource_start(this.__wbg_ptr, controller);
    }
    /**
     * @returns {ReadableStreamType}
     */
    get type() {
        const ret = wasm.intounderlyingbytesource_type(this.__wbg_ptr);
        return __wbindgen_enum_ReadableStreamType[ret];
    }
    cancel() {
        const ptr = this.__destroy_into_raw();
        wasm.intounderlyingbytesource_cancel(ptr);
    }
}
if (Symbol.dispose) IntoUnderlyingByteSource.prototype[Symbol.dispose] = IntoUnderlyingByteSource.prototype.free;

exports.IntoUnderlyingByteSource = IntoUnderlyingByteSource;

const IntoUnderlyingSinkFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_intounderlyingsink_free(ptr >>> 0, 1));

class IntoUnderlyingSink {

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        IntoUnderlyingSinkFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_intounderlyingsink_free(ptr, 0);
    }
    /**
     * @param {any} reason
     * @returns {Promise<any>}
     */
    abort(reason) {
        const ptr = this.__destroy_into_raw();
        const ret = wasm.intounderlyingsink_abort(ptr, reason);
        return ret;
    }
    /**
     * @returns {Promise<any>}
     */
    close() {
        const ptr = this.__destroy_into_raw();
        const ret = wasm.intounderlyingsink_close(ptr);
        return ret;
    }
    /**
     * @param {any} chunk
     * @returns {Promise<any>}
     */
    write(chunk) {
        const ret = wasm.intounderlyingsink_write(this.__wbg_ptr, chunk);
        return ret;
    }
}
if (Symbol.dispose) IntoUnderlyingSink.prototype[Symbol.dispose] = IntoUnderlyingSink.prototype.free;

exports.IntoUnderlyingSink = IntoUnderlyingSink;

const IntoUnderlyingSourceFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_intounderlyingsource_free(ptr >>> 0, 1));

class IntoUnderlyingSource {

    static __wrap(ptr) {
        ptr = ptr >>> 0;
        const obj = Object.create(IntoUnderlyingSource.prototype);
        obj.__wbg_ptr = ptr;
        IntoUnderlyingSourceFinalization.register(obj, obj.__wbg_ptr, obj);
        return obj;
    }

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        IntoUnderlyingSourceFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_intounderlyingsource_free(ptr, 0);
    }
    /**
     * @param {ReadableStreamDefaultController} controller
     * @returns {Promise<any>}
     */
    pull(controller) {
        const ret = wasm.intounderlyingsource_pull(this.__wbg_ptr, controller);
        return ret;
    }
    cancel() {
        const ptr = this.__destroy_into_raw();
        wasm.intounderlyingsource_cancel(ptr);
    }
}
if (Symbol.dispose) IntoUnderlyingSource.prototype[Symbol.dispose] = IntoUnderlyingSource.prototype.free;

exports.IntoUnderlyingSource = IntoUnderlyingSource;

const ParquetFileFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_parquetfile_free(ptr >>> 0, 1));

class ParquetFile {

    static __wrap(ptr) {
        ptr = ptr >>> 0;
        const obj = Object.create(ParquetFile.prototype);
        obj.__wbg_ptr = ptr;
        ParquetFileFinalization.register(obj, obj.__wbg_ptr, obj);
        return obj;
    }

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        ParquetFileFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_parquetfile_free(ptr, 0);
    }
    /**
     * Read from the Parquet file in an async fashion.
     *
     * @param options
     *
     *    Options for reading Parquet data. Optional keys include:
     *
     *    - `batchSize`: The number of rows in each batch. If not provided, the upstream parquet
     *           default is 1024.
     *    - `rowGroups`: Only read data from the provided row group indexes.
     *    - `limit`: Provide a limit to the number of rows to be read.
     *    - `offset`: Provide an offset to skip over the given number of rows.
     *    - `columns`: The column names from the file to read.
     * @param {ReaderOptions | null} [options]
     * @returns {Promise<Table>}
     */
    read(options) {
        const ret = wasm.parquetfile_read(this.__wbg_ptr, isLikeNone(options) ? 0 : addToExternrefTable0(options));
        return ret;
    }
    /**
     * @returns {Schema}
     */
    schema() {
        const ret = wasm.parquetfile_schema(this.__wbg_ptr);
        if (ret[2]) {
            throw takeFromExternrefTable0(ret[1]);
        }
        return Schema.__wrap(ret[0]);
    }
    /**
     * Create a readable stream of record batches.
     *
     * Each item in the stream will be a {@linkcode RecordBatch}.
     *
     * @param options
     *
     *    Options for reading Parquet data. Optional keys include:
     *
     *    - `batchSize`: The number of rows in each batch. If not provided, the upstream parquet
     *           default is 1024.
     *    - `rowGroups`: Only read data from the provided row group indexes.
     *    - `limit`: Provide a limit to the number of rows to be read.
     *    - `offset`: Provide an offset to skip over the given number of rows.
     *    - `columns`: The column names from the file to read.
     *    - `concurrency`: The number of concurrent requests to make
     * @param {ReaderOptions | null} [options]
     * @returns {Promise<ReadableStream>}
     */
    stream(options) {
        const ret = wasm.parquetfile_stream(this.__wbg_ptr, isLikeNone(options) ? 0 : addToExternrefTable0(options));
        return ret;
    }
    /**
     * Construct a ParquetFile from a new URL.
     * @param {string} url
     * @returns {Promise<ParquetFile>}
     */
    static fromUrl(url) {
        const ptr0 = passStringToWasm0(url, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
        const len0 = WASM_VECTOR_LEN;
        const ret = wasm.parquetfile_fromUrl(ptr0, len0);
        return ret;
    }
    /**
     * @returns {ParquetMetaData}
     */
    metadata() {
        const ret = wasm.parquetfile_metadata(this.__wbg_ptr);
        if (ret[2]) {
            throw takeFromExternrefTable0(ret[1]);
        }
        return ParquetMetaData.__wrap(ret[0]);
    }
    /**
     * Construct a ParquetFile from a new [Blob] or [File] handle.
     *
     * [Blob]: https://developer.mozilla.org/en-US/docs/Web/API/Blob
     * [File]: https://developer.mozilla.org/en-US/docs/Web/API/File
     *
     * Safety: Do not use this in a multi-threaded environment,
     * (transitively depends on `!Send` `web_sys::Blob`)
     * @param {Blob} handle
     * @returns {Promise<ParquetFile>}
     */
    static fromFile(handle) {
        const ret = wasm.parquetfile_fromFile(handle);
        return ret;
    }
}
if (Symbol.dispose) ParquetFile.prototype[Symbol.dispose] = ParquetFile.prototype.free;

exports.ParquetFile = ParquetFile;

const ParquetMetaDataFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_parquetmetadata_free(ptr >>> 0, 1));
/**
 * Global Parquet metadata.
 */
class ParquetMetaData {

    static __wrap(ptr) {
        ptr = ptr >>> 0;
        const obj = Object.create(ParquetMetaData.prototype);
        obj.__wbg_ptr = ptr;
        ParquetMetaDataFinalization.register(obj, obj.__wbg_ptr, obj);
        return obj;
    }

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        ParquetMetaDataFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_parquetmetadata_free(ptr, 0);
    }
    /**
     * Returns row group metadata for all row groups
     * @returns {RowGroupMetaData[]}
     */
    rowGroups() {
        const ret = wasm.parquetmetadata_rowGroups(this.__wbg_ptr);
        var v1 = getArrayJsValueFromWasm0(ret[0], ret[1]).slice();
        wasm.__wbindgen_free(ret[0], ret[1] * 4, 4);
        return v1;
    }
    /**
     * Returns file metadata as reference.
     * @returns {FileMetaData}
     */
    fileMetadata() {
        const ret = wasm.parquetmetadata_fileMetadata(this.__wbg_ptr);
        return FileMetaData.__wrap(ret);
    }
    /**
     * Returns number of row groups in this file.
     * @returns {number}
     */
    numRowGroups() {
        const ret = wasm.parquetmetadata_numRowGroups(this.__wbg_ptr);
        return ret >>> 0;
    }
    /**
     * Returns row group metadata for `i`th position.
     * Position should be less than number of row groups `num_row_groups`.
     * @param {number} i
     * @returns {RowGroupMetaData}
     */
    rowGroup(i) {
        const ret = wasm.parquetmetadata_rowGroup(this.__wbg_ptr, i);
        return RowGroupMetaData.__wrap(ret);
    }
}
if (Symbol.dispose) ParquetMetaData.prototype[Symbol.dis