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"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 });
exports.FieldNode = exports.BufferRegion = exports.DictionaryBatch = exports.RecordBatch = exports.Message = void 0;
const tslib_1 = require("tslib");
/* eslint-disable brace-style */
const flatbuffers = tslib_1.__importStar(require("flatbuffers"));
const schema_js_1 = require("../../fb/schema.js");
const int_js_1 = require("../../fb/int.js");
const record_batch_js_1 = require("../../fb/record-batch.js");
const dictionary_batch_js_1 = require("../../fb/dictionary-batch.js");
const buffer_js_1 = require("../../fb/buffer.js");
const field_js_1 = require("../../fb/field.js");
const field_node_js_1 = require("../../fb/field-node.js");
const type_js_1 = require("../../fb/type.js");
const key_value_js_1 = require("../../fb/key-value.js");
const endianness_js_1 = require("../../fb/endianness.js");
const floating_point_js_1 = require("../../fb/floating-point.js");
const decimal_js_1 = require("../../fb/decimal.js");
const date_js_1 = require("../../fb/date.js");
const time_js_1 = require("../../fb/time.js");
const timestamp_js_1 = require("../../fb/timestamp.js");
const interval_js_1 = require("../../fb/interval.js");
const union_js_1 = require("../../fb/union.js");
const fixed_size_binary_js_1 = require("../../fb/fixed-size-binary.js");
const fixed_size_list_js_1 = require("../../fb/fixed-size-list.js");
const map_js_1 = require("../../fb/map.js");
const message_js_1 = require("../../fb/message.js");
const schema_js_2 = require("../../schema.js");
const buffer_js_2 = require("../../util/buffer.js");
const enum_js_1 = require("../../enum.js");
const typeassembler_js_1 = require("../../visitor/typeassembler.js");
const json_js_1 = require("./json.js");
var Long = flatbuffers.Long;
var Builder = flatbuffers.Builder;
var ByteBuffer = flatbuffers.ByteBuffer;
const type_js_2 = require("../../type.js");
/**
* @ignore
* @private
**/
class Message {
constructor(bodyLength, version, headerType, header) {
this._version = version;
this._headerType = headerType;
this.body = new Uint8Array(0);
header && (this._createHeader = () => header);
this._bodyLength = typeof bodyLength === 'number' ? bodyLength : bodyLength.low;
}
/** @nocollapse */
static fromJSON(msg, headerType) {
const message = new Message(0, enum_js_1.MetadataVersion.V4, headerType);
message._createHeader = messageHeaderFromJSON(msg, headerType);
return message;
}
/** @nocollapse */
static decode(buf) {
buf = new ByteBuffer((0, buffer_js_2.toUint8Array)(buf));
const _message = message_js_1.Message.getRootAsMessage(buf);
const bodyLength = _message.bodyLength();
const version = _message.version();
const headerType = _message.headerType();
const message = new Message(bodyLength, version, headerType);
message._createHeader = decodeMessageHeader(_message, headerType);
return message;
}
/** @nocollapse */
static encode(message) {
const b = new Builder();
let headerOffset = -1;
if (message.isSchema()) {
headerOffset = schema_js_2.Schema.encode(b, message.header());
}
else if (message.isRecordBatch()) {
headerOffset = RecordBatch.encode(b, message.header());
}
else if (message.isDictionaryBatch()) {
headerOffset = DictionaryBatch.encode(b, message.header());
}
message_js_1.Message.startMessage(b);
message_js_1.Message.addVersion(b, enum_js_1.MetadataVersion.V4);
message_js_1.Message.addHeader(b, headerOffset);
message_js_1.Message.addHeaderType(b, message.headerType);
message_js_1.Message.addBodyLength(b, new Long(message.bodyLength, 0));
message_js_1.Message.finishMessageBuffer(b, message_js_1.Message.endMessage(b));
return b.asUint8Array();
}
/** @nocollapse */
static from(header, bodyLength = 0) {
if (header instanceof schema_js_2.Schema) {
return new Message(0, enum_js_1.MetadataVersion.V4, enum_js_1.MessageHeader.Schema, header);
}
if (header instanceof RecordBatch) {
return new Message(bodyLength, enum_js_1.MetadataVersion.V4, enum_js_1.MessageHeader.RecordBatch, header);
}
if (header instanceof DictionaryBatch) {
return new Message(bodyLength, enum_js_1.MetadataVersion.V4, enum_js_1.MessageHeader.DictionaryBatch, header);
}
throw new Error(`Unrecognized Message header: ${header}`);
}
get type() { return this.headerType; }
get version() { return this._version; }
get headerType() { return this._headerType; }
get bodyLength() { return this._bodyLength; }
header() { return this._createHeader(); }
isSchema() { return this.headerType === enum_js_1.MessageHeader.Schema; }
isRecordBatch() { return this.headerType === enum_js_1.MessageHeader.RecordBatch; }
isDictionaryBatch() { return this.headerType === enum_js_1.MessageHeader.DictionaryBatch; }
}
exports.Message = Message;
/**
* @ignore
* @private
**/
class RecordBatch {
constructor(length, nodes, buffers) {
this._nodes = nodes;
this._buffers = buffers;
this._length = typeof length === 'number' ? length : length.low;
}
get nodes() { return this._nodes; }
get length() { return this._length; }
get buffers() { return this._buffers; }
}
exports.RecordBatch = RecordBatch;
/**
* @ignore
* @private
**/
class DictionaryBatch {
constructor(data, id, isDelta = false) {
this._data = data;
this._isDelta = isDelta;
this._id = typeof id === 'number' ? id : id.low;
}
get id() { return this._id; }
get data() { return this._data; }
get isDelta() { return this._isDelta; }
get length() { return this.data.length; }
get nodes() { return this.data.nodes; }
get buffers() { return this.data.buffers; }
}
exports.DictionaryBatch = DictionaryBatch;
/**
* @ignore
* @private
**/
class BufferRegion {
constructor(offset, length) {
this.offset = typeof offset === 'number' ? offset : offset.low;
this.length = typeof length === 'number' ? length : length.low;
}
}
exports.BufferRegion = BufferRegion;
/**
* @ignore
* @private
**/
class FieldNode {
constructor(length, nullCount) {
this.length = typeof length === 'number' ? length : length.low;
this.nullCount = typeof nullCount === 'number' ? nullCount : nullCount.low;
}
}
exports.FieldNode = FieldNode;
/** @ignore */
function messageHeaderFromJSON(message, type) {
return (() => {
switch (type) {
case enum_js_1.MessageHeader.Schema: return schema_js_2.Schema.fromJSON(message);
case enum_js_1.MessageHeader.RecordBatch: return RecordBatch.fromJSON(message);
case enum_js_1.MessageHeader.DictionaryBatch: return DictionaryBatch.fromJSON(message);
}
throw new Error(`Unrecognized Message type: { name: ${enum_js_1.MessageHeader[type]}, type: ${type} }`);
});
}
/** @ignore */
function decodeMessageHeader(message, type) {
return (() => {
switch (type) {
case enum_js_1.MessageHeader.Schema: return schema_js_2.Schema.decode(message.header(new schema_js_1.Schema()));
case enum_js_1.MessageHeader.RecordBatch: return RecordBatch.decode(message.header(new record_batch_js_1.RecordBatch()), message.version());
case enum_js_1.MessageHeader.DictionaryBatch: return DictionaryBatch.decode(message.header(new dictionary_batch_js_1.DictionaryBatch()), message.version());
}
throw new Error(`Unrecognized Message type: { name: ${enum_js_1.MessageHeader[type]}, type: ${type} }`);
});
}
schema_js_2.Field['encode'] = encodeField;
schema_js_2.Field['decode'] = decodeField;
schema_js_2.Field['fromJSON'] = json_js_1.fieldFromJSON;
schema_js_2.Schema['encode'] = encodeSchema;
schema_js_2.Schema['decode'] = decodeSchema;
schema_js_2.Schema['fromJSON'] = json_js_1.schemaFromJSON;
RecordBatch['encode'] = encodeRecordBatch;
RecordBatch['decode'] = decodeRecordBatch;
RecordBatch['fromJSON'] = json_js_1.recordBatchFromJSON;
DictionaryBatch['encode'] = encodeDictionaryBatch;
DictionaryBatch['decode'] = decodeDictionaryBatch;
DictionaryBatch['fromJSON'] = json_js_1.dictionaryBatchFromJSON;
FieldNode['encode'] = encodeFieldNode;
FieldNode['decode'] = decodeFieldNode;
BufferRegion['encode'] = encodeBufferRegion;
BufferRegion['decode'] = decodeBufferRegion;
/** @ignore */
function decodeSchema(_schema, dictionaries = new Map()) {
const fields = decodeSchemaFields(_schema, dictionaries);
return new schema_js_2.Schema(fields, decodeCustomMetadata(_schema), dictionaries);
}
/** @ignore */
function decodeRecordBatch(batch, version = enum_js_1.MetadataVersion.V4) {
if (batch.compression() !== null) {
throw new Error('Record batch compression not implemented');
}
return new RecordBatch(batch.length(), decodeFieldNodes(batch), decodeBuffers(batch, version));
}
/** @ignore */
function decodeDictionaryBatch(batch, version = enum_js_1.MetadataVersion.V4) {
return new DictionaryBatch(RecordBatch.decode(batch.data(), version), batch.id(), batch.isDelta());
}
/** @ignore */
function decodeBufferRegion(b) {
return new BufferRegion(b.offset(), b.length());
}
/** @ignore */
function decodeFieldNode(f) {
return new FieldNode(f.length(), f.nullCount());
}
/** @ignore */
function decodeFieldNodes(batch) {
const nodes = [];
for (let f, i = -1, j = -1, n = batch.nodesLength(); ++i < n;) {
if (f = batch.nodes(i)) {
nodes[++j] = FieldNode.decode(f);
}
}
return nodes;
}
/** @ignore */
function decodeBuffers(batch, version) {
const bufferRegions = [];
for (let b, i = -1, j = -1, n = batch.buffersLength(); ++i < n;) {
if (b = batch.buffers(i)) {
// If this Arrow buffer was written before version 4,
// advance the buffer's bb_pos 8 bytes to skip past
// the now-removed page_id field
if (version < enum_js_1.MetadataVersion.V4) {
b.bb_pos += (8 * (i + 1));
}
bufferRegions[++j] = BufferRegion.decode(b);
}
}
return bufferRegions;
}
/** @ignore */
function decodeSchemaFields(schema, dictionaries) {
const fields = [];
for (let f, i = -1, j = -1, n = schema.fieldsLength(); ++i < n;) {
if (f = schema.fields(i)) {
fields[++j] = schema_js_2.Field.decode(f, dictionaries);
}
}
return fields;
}
/** @ignore */
function decodeFieldChildren(field, dictionaries) {
const children = [];
for (let f, i = -1, j = -1, n = field.childrenLength(); ++i < n;) {
if (f = field.children(i)) {
children[++j] = schema_js_2.Field.decode(f, dictionaries);
}
}
return children;
}
/** @ignore */
function decodeField(f, dictionaries) {
let id;
let field;
let type;
let keys;
let dictType;
let dictMeta;
// If no dictionary encoding
if (!dictionaries || !(dictMeta = f.dictionary())) {
type = decodeFieldType(f, decodeFieldChildren(f, dictionaries));
field = new schema_js_2.Field(f.name(), type, f.nullable(), decodeCustomMetadata(f));
}
// If dictionary encoded and the first time we've seen this dictionary id, decode
// the data type and child fields, then wrap in a Dictionary type and insert the
// data type into the dictionary types map.
else if (!dictionaries.has(id = dictMeta.id().low)) {
// a dictionary index defaults to signed 32 bit int if unspecified
keys = (keys = dictMeta.indexType()) ? decodeIndexType(keys) : new type_js_2.Int32();
dictionaries.set(id, type = decodeFieldType(f, decodeFieldChildren(f, dictionaries)));
dictType = new type_js_2.Dictionary(type, keys, id, dictMeta.isOrdered());
field = new schema_js_2.Field(f.name(), dictType, f.nullable(), decodeCustomMetadata(f));
}
// If dictionary encoded, and have already seen this dictionary Id in the schema, then reuse the
// data type and wrap in a new Dictionary type and field.
else {
// a dictionary index defaults to signed 32 bit int if unspecified
keys = (keys = dictMeta.indexType()) ? decodeIndexType(keys) : new type_js_2.Int32();
dictType = new type_js_2.Dictionary(dictionaries.get(id), keys, id, dictMeta.isOrdered());
field = new schema_js_2.Field(f.name(), dictType, f.nullable(), decodeCustomMetadata(f));
}
return field || null;
}
/** @ignore */
function decodeCustomMetadata(parent) {
const data = new Map();
if (parent) {
for (let entry, key, i = -1, n = Math.trunc(parent.customMetadataLength()); ++i < n;) {
if ((entry = parent.customMetadata(i)) && (key = entry.key()) != null) {
data.set(key, entry.value());
}
}
}
return data;
}
/** @ignore */
function decodeIndexType(_type) {
return new type_js_2.Int(_type.isSigned(), _type.bitWidth());
}
/** @ignore */
function decodeFieldType(f, children) {
const typeId = f.typeType();
switch (typeId) {
case type_js_1.Type['NONE']: return new type_js_2.Null();
case type_js_1.Type['Null']: return new type_js_2.Null();
case type_js_1.Type['Binary']: return new type_js_2.Binary();
case type_js_1.Type['Utf8']: return new type_js_2.Utf8();
case type_js_1.Type['Bool']: return new type_js_2.Bool();
case type_js_1.Type['List']: return new type_js_2.List((children || [])[0]);
case type_js_1.Type['Struct_']: return new type_js_2.Struct(children || []);
}
switch (typeId) {
case type_js_1.Type['Int']: {
const t = f.type(new int_js_1.Int());
return new type_js_2.Int(t.isSigned(), t.bitWidth());
}
case type_js_1.Type['FloatingPoint']: {
const t = f.type(new floating_point_js_1.FloatingPoint());
return new type_js_2.Float(t.precision());
}
case type_js_1.Type['Decimal']: {
const t = f.type(new decimal_js_1.Decimal());
return new type_js_2.Decimal(t.scale(), t.precision(), t.bitWidth());
}
case type_js_1.Type['Date']: {
const t = f.type(new date_js_1.Date());
return new type_js_2.Date_(t.unit());
}
case type_js_1.Type['Time']: {
const t = f.type(new time_js_1.Time());
return new type_js_2.Time(t.unit(), t.bitWidth());
}
case type_js_1.Type['Timestamp']: {
const t = f.type(new timestamp_js_1.Timestamp());
return new type_js_2.Timestamp(t.unit(), t.timezone());
}
case type_js_1.Type['Interval']: {
const t = f.type(new interval_js_1.Interval());
return new type_js_2.Interval(t.unit());
}
case type_js_1.Type['Union']: {
const t = f.type(new union_js_1.Union());
return new type_js_2.Union(t.mode(), t.typeIdsArray() || [], children || []);
}
case type_js_1.Type['FixedSizeBinary']: {
const t = f.type(new fixed_size_binary_js_1.FixedSizeBinary());
return new type_js_2.FixedSizeBinary(t.byteWidth());
}
case type_js_1.Type['FixedSizeList']: {
const t = f.type(new fixed_size_list_js_1.FixedSizeList());
return new type_js_2.FixedSizeList(t.listSize(), (children || [])[0]);
}
case type_js_1.Type['Map']: {
const t = f.type(new map_js_1.Map());
return new type_js_2.Map_((children || [])[0], t.keysSorted());
}
}
throw new Error(`Unrecognized type: "${type_js_1.Type[typeId]}" (${typeId})`);
}
/** @ignore */
function encodeSchema(b, schema) {
const fieldOffsets = schema.fields.map((f) => schema_js_2.Field.encode(b, f));
schema_js_1.Schema.startFieldsVector(b, fieldOffsets.length);
const fieldsVectorOffset = schema_js_1.Schema.createFieldsVector(b, fieldOffsets);
const metadataOffset = !(schema.metadata && schema.metadata.size > 0) ? -1 :
schema_js_1.Schema.createCustomMetadataVector(b, [...schema.metadata].map(([k, v]) => {
const key = b.createString(`${k}`);
const val = b.createString(`${v}`);
key_value_js_1.KeyValue.startKeyValue(b);
key_value_js_1.KeyValue.addKey(b, key);
key_value_js_1.KeyValue.addValue(b, val);
return key_value_js_1.KeyValue.endKeyValue(b);
}));
schema_js_1.Schema.startSchema(b);
schema_js_1.Schema.addFields(b, fieldsVectorOffset);
schema_js_1.Schema.addEndianness(b, platformIsLittleEndian ? endianness_js_1.Endianness.Little : endianness_js_1.Endianness.Big);
if (metadataOffset !== -1) {
schema_js_1.Schema.addCustomMetadata(b, metadataOffset);
}
return schema_js_1.Schema.endSchema(b);
}
/** @ignore */
function encodeField(b, field) {
let nameOffset = -1;
let typeOffset = -1;
let dictionaryOffset = -1;
const type = field.type;
let typeId = field.typeId;
if (!type_js_2.DataType.isDictionary(type)) {
typeOffset = typeassembler_js_1.instance.visit(type, b);
}
else {
typeId = type.dictionary.typeId;
dictionaryOffset = typeassembler_js_1.instance.visit(type, b);
typeOffset = typeassembler_js_1.instance.visit(type.dictionary, b);
}
const childOffsets = (type.children || []).map((f) => schema_js_2.Field.encode(b, f));
const childrenVectorOffset = field_js_1.Field.createChildrenVector(b, childOffsets);
const metadataOffset = !(field.metadata && field.metadata.size > 0) ? -1 :
field_js_1.Field.createCustomMetadataVector(b, [...field.metadata].map(([k, v]) => {
const key = b.createString(`${k}`);
const val = b.createString(`${v}`);
key_value_js_1.KeyValue.startKeyValue(b);
key_value_js_1.KeyValue.addKey(b, key);
key_value_js_1.KeyValue.addValue(b, val);
return key_value_js_1.KeyValue.endKeyValue(b);
}));
if (field.name) {
nameOffset = b.createString(field.name);
}
field_js_1.Field.startField(b);
field_js_1.Field.addType(b, typeOffset);
field_js_1.Field.addTypeType(b, typeId);
field_js_1.Field.addChildren(b, childrenVectorOffset);
field_js_1.Field.addNullable(b, !!field.nullable);
if (nameOffset !== -1) {
field_js_1.Field.addName(b, nameOffset);
}
if (dictionaryOffset !== -1) {
field_js_1.Field.addDictionary(b, dictionaryOffset);
}
if (metadataOffset !== -1) {
field_js_1.Field.addCustomMetadata(b, metadataOffset);
}
return field_js_1.Field.endField(b);
}
/** @ignore */
function encodeRecordBatch(b, recordBatch) {
const nodes = recordBatch.nodes || [];
const buffers = recordBatch.buffers || [];
record_batch_js_1.RecordBatch.startNodesVector(b, nodes.length);
for (const n of nodes.slice().reverse())
FieldNode.encode(b, n);
const nodesVectorOffset = b.endVector();
record_batch_js_1.RecordBatch.startBuffersVector(b, buffers.length);
for (const b_ of buffers.slice().reverse())
BufferRegion.encode(b, b_);
const buffersVectorOffset = b.endVector();
record_batch_js_1.RecordBatch.startRecordBatch(b);
record_batch_js_1.RecordBatch.addLength(b, new Long(recordBatch.length, 0));
record_batch_js_1.RecordBatch.addNodes(b, nodesVectorOffset);
record_batch_js_1.RecordBatch.addBuffers(b, buffersVectorOffset);
return record_batch_js_1.RecordBatch.endRecordBatch(b);
}
/** @ignore */
function encodeDictionaryBatch(b, dictionaryBatch) {
const dataOffset = RecordBatch.encode(b, dictionaryBatch.data);
dictionary_batch_js_1.DictionaryBatch.startDictionaryBatch(b);
dictionary_batch_js_1.DictionaryBatch.addId(b, new Long(dictionaryBatch.id, 0));
dictionary_batch_js_1.DictionaryBatch.addIsDelta(b, dictionaryBatch.isDelta);
dictionary_batch_js_1.DictionaryBatch.addData(b, dataOffset);
return dictionary_batch_js_1.DictionaryBatch.endDictionaryBatch(b);
}
/** @ignore */
function encodeFieldNode(b, node) {
return field_node_js_1.FieldNode.createFieldNode(b, new Long(node.length, 0), new Long(node.nullCount, 0));
}
/** @ignore */
function encodeBufferRegion(b, node) {
return buffer_js_1.Buffer.createBuffer(b, new Long(node.offset, 0), new Long(node.length, 0));
}
/** @ignore */
const platformIsLittleEndian = (() => {
const buffer = new ArrayBuffer(2);
new DataView(buffer).setInt16(0, 256, true /* littleEndian */);
// Int16Array uses the platform's endianness.
return new Int16Array(buffer)[0] === 256;
})();
//# sourceMappingURL=message.js.map
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