src/Apache.Arrow/Types/DurationType.cs

// 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.

namespace Apache.Arrow.Types
{
    public sealed class DurationType : TimeBasedType
    {
        public static readonly DurationType Second = new DurationType(TimeUnit.Second);
        public static readonly DurationType Millisecond = new DurationType(TimeUnit.Millisecond);
        public static readonly DurationType Microsecond = new DurationType(TimeUnit.Microsecond);
        public static readonly DurationType Nanosecond = new DurationType(TimeUnit.Nanosecond);
        private static readonly DurationType[] _types = new DurationType[] { Second, Millisecond, Microsecond, Nanosecond };

        private DurationType(TimeUnit unit)
            : base(unit)
        {
        }

        public override ArrowTypeId TypeId => ArrowTypeId.Duration;
        public override string Name => "duration";
        public override int BitWidth => 64;

        public static DurationType FromTimeUnit(TimeUnit unit)
        {
            return _types[(int)unit];
        }

        public override void Accept(IArrowTypeVisitor visitor) => Accept(this, visitor);
    }
}