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LazyDocument.cs
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/
LazyDocument.cs
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/* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. 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 System.Threading;
using System.Threading.Tasks;
using OpenSearch.Net;
using OpenSearch.Net.Utf8Json;
namespace OpenSearch.Client
{
/// <summary>
/// A lazily deserialized document
/// </summary>
[JsonFormatter(typeof(LazyDocumentInterfaceFormatter))]
public interface ILazyDocument
{
/// <summary>
/// Creates an instance of <typeparamref name="T" /> from this
/// <see cref="ILazyDocument" /> instance
/// </summary>
/// <typeparam name="T">The type</typeparam>
T As<T>();
/// <summary>
/// Creates an instance of <paramref name="objectType" /> from this
/// <see cref="ILazyDocument" /> instance
/// </summary>
/// <param name="objectType">The type</param>
object As(Type objectType);
/// <summary>
/// Creates an instance of <typeparamref name="T" /> from this
/// <see cref="ILazyDocument" /> instance
/// </summary>
/// <typeparam name="T">The type</typeparam>
Task<T> AsAsync<T>(CancellationToken ct = default);
/// <summary>
/// Creates an instance of <paramref name="objectType" /> from this
/// <see cref="ILazyDocument" /> instance
/// </summary>
/// <param name="objectType">The type</param>
Task<object> AsAsync(Type objectType, CancellationToken ct = default);
}
/// <inheritdoc />
[JsonFormatter(typeof(LazyDocumentFormatter))]
public class LazyDocument : ILazyDocument
{
private readonly IOpenSearchSerializer _sourceSerializer;
private readonly IOpenSearchSerializer _requestResponseSerializer;
private readonly IMemoryStreamFactory _memoryStreamFactory;
internal LazyDocument(byte[] bytes, IJsonFormatterResolver formatterResolver)
{
Bytes = bytes;
var settings = formatterResolver.GetConnectionSettings();
_sourceSerializer = settings.SourceSerializer;
_requestResponseSerializer = settings.RequestResponseSerializer;
_memoryStreamFactory = settings.MemoryStreamFactory;
}
internal byte[] Bytes { get; }
internal T AsUsingRequestResponseSerializer<T>()
{
using (var ms = _memoryStreamFactory.Create(Bytes))
return _requestResponseSerializer.Deserialize<T>(ms);
}
/// <inheritdoc />
public T As<T>()
{
using (var ms = _memoryStreamFactory.Create(Bytes))
return _sourceSerializer.Deserialize<T>(ms);
}
/// <inheritdoc />
public object As(Type objectType)
{
using (var ms = _memoryStreamFactory.Create(Bytes))
return _sourceSerializer.Deserialize(objectType, ms);
}
/// <inheritdoc />
public Task<T> AsAsync<T>(CancellationToken ct = default)
{
using (var ms = _memoryStreamFactory.Create(Bytes))
return _sourceSerializer.DeserializeAsync<T>(ms, ct);
}
/// <inheritdoc />
public Task<object> AsAsync(Type objectType, CancellationToken ct = default)
{
using (var ms = _memoryStreamFactory.Create(Bytes))
return _sourceSerializer.DeserializeAsync(objectType, ms, ct);
}
}
}