Spaces:
Running
Running
File size: 5,776 Bytes
78c921d |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 |
"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.FileBlock = exports.Footer = void 0;
const tslib_1 = require("tslib");
/* eslint-disable @typescript-eslint/naming-convention */
const block_js_1 = require("../../fb/block.js");
const footer_js_1 = require("../../fb/footer.js");
const flatbuffers = tslib_1.__importStar(require("flatbuffers"));
var Long = flatbuffers.Long;
var Builder = flatbuffers.Builder;
var ByteBuffer = flatbuffers.ByteBuffer;
const schema_js_1 = require("../../schema.js");
const enum_js_1 = require("../../enum.js");
const buffer_js_1 = require("../../util/buffer.js");
/** @ignore */
class Footer_ {
constructor(schema, version = enum_js_1.MetadataVersion.V4, recordBatches, dictionaryBatches) {
this.schema = schema;
this.version = version;
recordBatches && (this._recordBatches = recordBatches);
dictionaryBatches && (this._dictionaryBatches = dictionaryBatches);
}
/** @nocollapse */
static decode(buf) {
buf = new ByteBuffer((0, buffer_js_1.toUint8Array)(buf));
const footer = footer_js_1.Footer.getRootAsFooter(buf);
const schema = schema_js_1.Schema.decode(footer.schema());
return new OffHeapFooter(schema, footer);
}
/** @nocollapse */
static encode(footer) {
const b = new Builder();
const schemaOffset = schema_js_1.Schema.encode(b, footer.schema);
footer_js_1.Footer.startRecordBatchesVector(b, footer.numRecordBatches);
for (const rb of [...footer.recordBatches()].slice().reverse()) {
FileBlock.encode(b, rb);
}
const recordBatchesOffset = b.endVector();
footer_js_1.Footer.startDictionariesVector(b, footer.numDictionaries);
for (const db of [...footer.dictionaryBatches()].slice().reverse()) {
FileBlock.encode(b, db);
}
const dictionaryBatchesOffset = b.endVector();
footer_js_1.Footer.startFooter(b);
footer_js_1.Footer.addSchema(b, schemaOffset);
footer_js_1.Footer.addVersion(b, enum_js_1.MetadataVersion.V4);
footer_js_1.Footer.addRecordBatches(b, recordBatchesOffset);
footer_js_1.Footer.addDictionaries(b, dictionaryBatchesOffset);
footer_js_1.Footer.finishFooterBuffer(b, footer_js_1.Footer.endFooter(b));
return b.asUint8Array();
}
get numRecordBatches() { return this._recordBatches.length; }
get numDictionaries() { return this._dictionaryBatches.length; }
*recordBatches() {
for (let block, i = -1, n = this.numRecordBatches; ++i < n;) {
if (block = this.getRecordBatch(i)) {
yield block;
}
}
}
*dictionaryBatches() {
for (let block, i = -1, n = this.numDictionaries; ++i < n;) {
if (block = this.getDictionaryBatch(i)) {
yield block;
}
}
}
getRecordBatch(index) {
return index >= 0
&& index < this.numRecordBatches
&& this._recordBatches[index] || null;
}
getDictionaryBatch(index) {
return index >= 0
&& index < this.numDictionaries
&& this._dictionaryBatches[index] || null;
}
}
exports.Footer = Footer_;
/** @ignore */
class OffHeapFooter extends Footer_ {
constructor(schema, _footer) {
super(schema, _footer.version());
this._footer = _footer;
}
get numRecordBatches() { return this._footer.recordBatchesLength(); }
get numDictionaries() { return this._footer.dictionariesLength(); }
getRecordBatch(index) {
if (index >= 0 && index < this.numRecordBatches) {
const fileBlock = this._footer.recordBatches(index);
if (fileBlock) {
return FileBlock.decode(fileBlock);
}
}
return null;
}
getDictionaryBatch(index) {
if (index >= 0 && index < this.numDictionaries) {
const fileBlock = this._footer.dictionaries(index);
if (fileBlock) {
return FileBlock.decode(fileBlock);
}
}
return null;
}
}
/** @ignore */
class FileBlock {
constructor(metaDataLength, bodyLength, offset) {
this.metaDataLength = metaDataLength;
this.offset = typeof offset === 'number' ? offset : offset.low;
this.bodyLength = typeof bodyLength === 'number' ? bodyLength : bodyLength.low;
}
/** @nocollapse */
static decode(block) {
return new FileBlock(block.metaDataLength(), block.bodyLength(), block.offset());
}
/** @nocollapse */
static encode(b, fileBlock) {
const { metaDataLength } = fileBlock;
const offset = new Long(fileBlock.offset, 0);
const bodyLength = new Long(fileBlock.bodyLength, 0);
return block_js_1.Block.createBlock(b, offset, metaDataLength, bodyLength);
}
}
exports.FileBlock = FileBlock;
//# sourceMappingURL=file.js.map
|