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// 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.
/* eslint-disable @typescript-eslint/naming-convention */
import { Block as _Block } from '../../fb/block.js';
import { Footer as _Footer } from '../../fb/footer.js';
import * as flatbuffers from 'flatbuffers';
import Long = flatbuffers.Long;
import Builder = flatbuffers.Builder;
import ByteBuffer = flatbuffers.ByteBuffer;
import { Schema } from '../../schema.js';
import { MetadataVersion } from '../../enum.js';
import { toUint8Array } from '../../util/buffer.js';
import { ArrayBufferViewInput } from '../../util/buffer.js';
/** @ignore */
class Footer_ {
/** @nocollapse */
public static decode(buf: ArrayBufferViewInput) {
buf = new ByteBuffer(toUint8Array(buf));
const footer = _Footer.getRootAsFooter(buf);
const schema = Schema.decode(footer.schema()!);
return new OffHeapFooter(schema, footer) as Footer_;
}
/** @nocollapse */
public static encode(footer: Footer_) {
const b: Builder = new Builder();
const schemaOffset = Schema.encode(b, footer.schema);
_Footer.startRecordBatchesVector(b, footer.numRecordBatches);
for (const rb of [...footer.recordBatches()].slice().reverse()) {
FileBlock.encode(b, rb);
}
const recordBatchesOffset = b.endVector();
_Footer.startDictionariesVector(b, footer.numDictionaries);
for (const db of [...footer.dictionaryBatches()].slice().reverse()) {
FileBlock.encode(b, db);
}
const dictionaryBatchesOffset = b.endVector();
_Footer.startFooter(b);
_Footer.addSchema(b, schemaOffset);
_Footer.addVersion(b, MetadataVersion.V4);
_Footer.addRecordBatches(b, recordBatchesOffset);
_Footer.addDictionaries(b, dictionaryBatchesOffset);
_Footer.finishFooterBuffer(b, _Footer.endFooter(b));
return b.asUint8Array();
}
declare protected _recordBatches: FileBlock[];
declare protected _dictionaryBatches: FileBlock[];
public get numRecordBatches() { return this._recordBatches.length; }
public get numDictionaries() { return this._dictionaryBatches.length; }
constructor(public schema: Schema,
public version: MetadataVersion = MetadataVersion.V4,
recordBatches?: FileBlock[], dictionaryBatches?: FileBlock[]) {
recordBatches && (this._recordBatches = recordBatches);
dictionaryBatches && (this._dictionaryBatches = dictionaryBatches);
}
public *recordBatches(): Iterable<FileBlock> {
for (let block, i = -1, n = this.numRecordBatches; ++i < n;) {
if (block = this.getRecordBatch(i)) { yield block; }
}
}
public *dictionaryBatches(): Iterable<FileBlock> {
for (let block, i = -1, n = this.numDictionaries; ++i < n;) {
if (block = this.getDictionaryBatch(i)) { yield block; }
}
}
public getRecordBatch(index: number) {
return index >= 0
&& index < this.numRecordBatches
&& this._recordBatches[index] || null;
}
public getDictionaryBatch(index: number) {
return index >= 0
&& index < this.numDictionaries
&& this._dictionaryBatches[index] || null;
}
}
export { Footer_ as Footer };
/** @ignore */
class OffHeapFooter extends Footer_ {
public get numRecordBatches() { return this._footer.recordBatchesLength(); }
public get numDictionaries() { return this._footer.dictionariesLength(); }
constructor(schema: Schema, protected _footer: _Footer) {
super(schema, _footer.version());
}
public getRecordBatch(index: number) {
if (index >= 0 && index < this.numRecordBatches) {
const fileBlock = this._footer.recordBatches(index);
if (fileBlock) { return FileBlock.decode(fileBlock); }
}
return null;
}
public getDictionaryBatch(index: number) {
if (index >= 0 && index < this.numDictionaries) {
const fileBlock = this._footer.dictionaries(index);
if (fileBlock) { return FileBlock.decode(fileBlock); }
}
return null;
}
}
/** @ignore */
export class FileBlock {
/** @nocollapse */
public static decode(block: _Block) {
return new FileBlock(block.metaDataLength(), block.bodyLength(), block.offset());
}
/** @nocollapse */
public static encode(b: Builder, fileBlock: FileBlock) {
const { metaDataLength } = fileBlock;
const offset = new Long(fileBlock.offset, 0);
const bodyLength = new Long(fileBlock.bodyLength, 0);
return _Block.createBlock(b, offset, metaDataLength, bodyLength);
}
public offset: number;
public bodyLength: number;
public metaDataLength: number;
constructor(metaDataLength: number, bodyLength: Long | number, offset: Long | number) {
this.metaDataLength = metaDataLength;
this.offset = typeof offset === 'number' ? offset : offset.low;
this.bodyLength = typeof bodyLength === 'number' ? bodyLength : bodyLength.low;
}
}
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