@uwdata/flechette/src/encode/dictionary-batch.js

Fast, lightweight access to Apache Arrow data.

import { encodeRecordBatch } from './record-batch.js';

/**
 * @param {import('./builder.js').Builder} builder
 * @param {import('../types.js').DictionaryBatch} dictionaryBatch
 * @returns {number}
 */
export function encodeDictionaryBatch(builder, dictionaryBatch) {
  const dataOffset = encodeRecordBatch(builder, dictionaryBatch.data);
  return builder.addObject(3, b => {
    b.addInt64(0, dictionaryBatch.id, 0);
    b.addOffset(1, dataOffset, 0);
    b.addInt8(2, +dictionaryBatch.isDelta, 0);
  });
}