| // 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. |
| |
| using System; |
| using Apache.Arrow.Types; |
| |
| namespace Apache.Arrow |
| { |
| public class ListArray : Array |
| { |
| public IArrowArray Values { get; } |
| |
| public ArrowBuffer ValueOffsetsBuffer => Data.Buffers[1]; |
| |
| public ReadOnlySpan<int> ValueOffsets => ValueOffsetsBuffer.Span.CastTo<int>().Slice(0, Length + 1); |
| |
| public ListArray(IArrowType dataType, int length, |
| ArrowBuffer valueOffsetsBuffer, IArrowArray values, |
| ArrowBuffer nullBitmapBuffer, int nullCount = 0, int offset = 0) |
| : this(new ArrayData(dataType, length, nullCount, offset, |
| new[] {nullBitmapBuffer, valueOffsetsBuffer}, new[] {values.Data})) |
| { |
| Values = values; |
| } |
| |
| public ListArray(ArrayData data) |
| : base(data) |
| { |
| data.EnsureBufferCount(2); |
| data.EnsureDataType(ArrowTypeId.List); |
| } |
| |
| public override void Accept(IArrowArrayVisitor visitor) => Accept(this, visitor); |
| |
| public int GetValueOffset(int index) |
| { |
| return ValueOffsets[index]; |
| } |
| |
| public int GetValueLength(int index) |
| { |
| var offsets = ValueOffsets; |
| return offsets[index + 1] - offsets[index]; |
| } |
| |
| protected override void Dispose(bool disposing) |
| { |
| if (disposing) |
| { |
| Values?.Dispose(); |
| } |
| base.Dispose(disposing); |
| } |
| } |
| } |