// 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.

include "../../format/Schema.fbs";

namespace org.apache.arrow.computeir.flatbuf;

table ListLiteral {
  values: [Literal] (required);
}

table StructLiteral {
  /// Values for each struct field; the order must match the order of fields
  /// in the `type` field of `Literal`.
  values: [Literal] (required);
}

table KeyValue {
  key: Literal (required);
  value: Literal (required);
}

table MapLiteral {
  values: [KeyValue] (required);
}

table Int8Literal {
  value: int8;
}

table Int16Literal {
  value: int16;
}

table Int32Literal {
  value: int32;
}

table Int64Literal {
  value: int64;
}

table UInt8Literal {
  value: uint8;
}

table UInt16Literal {
  value: uint16;
}

table UInt32Literal {
  value: uint32;
}

table UInt64Literal {
  value: uint64;
}

table Float16Literal {
  value: uint16;
}

table Float32Literal {
  value: float32;
}

table Float64Literal {
  value: float64;
}

table DecimalLiteral {
  /// Bytes of a Decimal value; bytes must be in little-endian order.
  value: [byte] (required);
}

table BooleanLiteral {
  value: bool;
}

table DateLiteral {
  value: int64;
}

table TimeLiteral {
  value: int64;
}

table TimestampLiteral {
  value: int64;
}

table IntervalLiteralMonths {
  months: int32;
}

table IntervalLiteralDaysMilliseconds {
  days: int32;
  milliseconds: int32;
}

union IntervalLiteralImpl {
  IntervalLiteralMonths,
  IntervalLiteralDaysMilliseconds,
}

table IntervalLiteral {
  value: IntervalLiteralImpl (required);
}

table DurationLiteral {
  value: int64;
}

table BinaryLiteral {
  value: [byte] (required);
}

table FixedSizeBinaryLiteral {
  value: [byte] (required);
}

table StringLiteral {
  value: string (required);
}

// no union literal is defined as only one branch of a union can be resolved.
// no literals for large string/binary types as flatbuffer is limited to 2gb.

union LiteralImpl {
  BooleanLiteral,

  Int8Literal,
  Int16Literal,
  Int32Literal,
  Int64Literal,

  UInt8Literal,
  UInt16Literal,
  UInt32Literal,
  UInt64Literal,

  DateLiteral,
  TimeLiteral,
  TimestampLiteral,
  IntervalLiteral,
  DurationLiteral,

  DecimalLiteral,

  Float16Literal,
  Float32Literal,
  Float64Literal,

  ListLiteral,
  StructLiteral,
  MapLiteral,

  StringLiteral,
  BinaryLiteral,
  FixedSizeBinaryLiteral,
}

table Literal {
  /// Literal value data; for null literals do not include this field.
  impl: LiteralImpl;
  /// Type of the literal value. This must match `impl`.
  type: org.apache.arrow.flatbuf.Field (required);
}

root_type Literal;