// automatically generated by the FlatBuffers compiler, do not modify

import * as flatbuffers from 'flatbuffers';

import { DictionaryEncoding } from './dictionary-encoding.js';
import { KeyValue } from './key-value.js';
import { Type } from './type.js';


/**
 * ----------------------------------------------------------------------
 * A field represents a named column in a record / row batch or child of a
 * nested type.
 */
export class Field {
  bb: flatbuffers.ByteBuffer|null = null;
  bb_pos = 0;
__init(i:number, bb:flatbuffers.ByteBuffer):Field {
  this.bb_pos = i;
  this.bb = bb;
  return this;
}

static getRootAsField(bb:flatbuffers.ByteBuffer, obj?:Field):Field {
  return (obj || new Field()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
}

static getSizePrefixedRootAsField(bb:flatbuffers.ByteBuffer, obj?:Field):Field {
  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
  return (obj || new Field()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
}

/**
 * Name is not required, in i.e. a List
 */
name():string|null
name(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
name(optionalEncoding?:any):string|Uint8Array|null {
  const offset = this.bb!.__offset(this.bb_pos, 4);
  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
}

/**
 * Whether or not this field can contain nulls. Should be true in general.
 */
nullable():boolean {
  const offset = this.bb!.__offset(this.bb_pos, 6);
  return offset ? !!this.bb!.readInt8(this.bb_pos + offset) : false;
}

typeType():Type {
  const offset = this.bb!.__offset(this.bb_pos, 8);
  return offset ? this.bb!.readUint8(this.bb_pos + offset) : Type.NONE;
}

/**
 * This is the type of the decoded value if the field is dictionary encoded.
 */
// @ts-ignore
type<T extends flatbuffers.Table>(obj:any):any|null {
  const offset = this.bb!.__offset(this.bb_pos, 10);
  return offset ? this.bb!.__union(obj, this.bb_pos + offset) : null;
}

/**
 * Present only if the field is dictionary encoded.
 */
dictionary(obj?:DictionaryEncoding):DictionaryEncoding|null {
  const offset = this.bb!.__offset(this.bb_pos, 12);
  return offset ? (obj || new DictionaryEncoding()).__init(this.bb!.__indirect(this.bb_pos + offset), this.bb!) : null;
}

/**
 * children apply only to nested data types like Struct, List and Union. For
 * primitive types children will have length 0.
 */
children(index: number, obj?:Field):Field|null {
  const offset = this.bb!.__offset(this.bb_pos, 14);
  return offset ? (obj || new Field()).__init(this.bb!.__indirect(this.bb!.__vector(this.bb_pos + offset) + index * 4), this.bb!) : null;
}

childrenLength():number {
  const offset = this.bb!.__offset(this.bb_pos, 14);
  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
}

/**
 * User-defined metadata
 */
customMetadata(index: number, obj?:KeyValue):KeyValue|null {
  const offset = this.bb!.__offset(this.bb_pos, 16);
  return offset ? (obj || new KeyValue()).__init(this.bb!.__indirect(this.bb!.__vector(this.bb_pos + offset) + index * 4), this.bb!) : null;
}

customMetadataLength():number {
  const offset = this.bb!.__offset(this.bb_pos, 16);
  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
}

static startField(builder:flatbuffers.Builder) {
  builder.startObject(7);
}

static addName(builder:flatbuffers.Builder, nameOffset:flatbuffers.Offset) {
  builder.addFieldOffset(0, nameOffset, 0);
}

static addNullable(builder:flatbuffers.Builder, nullable:boolean) {
  builder.addFieldInt8(1, +nullable, +false);
}

static addTypeType(builder:flatbuffers.Builder, typeType:Type) {
  builder.addFieldInt8(2, typeType, Type.NONE);
}

static addType(builder:flatbuffers.Builder, typeOffset:flatbuffers.Offset) {
  builder.addFieldOffset(3, typeOffset, 0);
}

static addDictionary(builder:flatbuffers.Builder, dictionaryOffset:flatbuffers.Offset) {
  builder.addFieldOffset(4, dictionaryOffset, 0);
}

static addChildren(builder:flatbuffers.Builder, childrenOffset:flatbuffers.Offset) {
  builder.addFieldOffset(5, childrenOffset, 0);
}

static createChildrenVector(builder:flatbuffers.Builder, data:flatbuffers.Offset[]):flatbuffers.Offset {
  builder.startVector(4, data.length, 4);
  for (let i = data.length - 1; i >= 0; i--) {
    builder.addOffset(data[i]!);
  }
  return builder.endVector();
}

static startChildrenVector(builder:flatbuffers.Builder, numElems:number) {
  builder.startVector(4, numElems, 4);
}

static addCustomMetadata(builder:flatbuffers.Builder, customMetadataOffset:flatbuffers.Offset) {
  builder.addFieldOffset(6, customMetadataOffset, 0);
}

static createCustomMetadataVector(builder:flatbuffers.Builder, data:flatbuffers.Offset[]):flatbuffers.Offset {
  builder.startVector(4, data.length, 4);
  for (let i = data.length - 1; i >= 0; i--) {
    builder.addOffset(data[i]!);
  }
  return builder.endVector();
}

static startCustomMetadataVector(builder:flatbuffers.Builder, numElems:number) {
  builder.startVector(4, numElems, 4);
}

static endField(builder:flatbuffers.Builder):flatbuffers.Offset {
  const offset = builder.endObject();
  return offset;
}

}