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Update mongodb

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This commit is contained in:
sunkaixuan
2025-05-02 11:39:41 +08:00
parent 5ec98af257
commit 8b1710b09e
9 changed files with 286 additions and 15 deletions
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33
Src/Asp.NetCore2/MongoDb.Ado.data/ExecuteDbDataReaderItems/DbDataReaderFactory.cs Normal file
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using MongoDB.Bson;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Text;
namespace MongoDb.Ado.data
{
public class DbDataReaderFactory
{
public DbDataReader Handle(string operation, IMongoCollection<BsonDocument> collection, string json)
{
var doc = MongoDB.Bson.Serialization.BsonSerializer.Deserialize<BsonValue>(json);
IQueryHandler queryHandler = null;
if (operation == "find")
{
queryHandler = new QueryFindHandler();
}
else if (operation == "aggregate")
{
queryHandler = new QueryAggregateHandler();
}
else
{
throw new NotSupportedException($" NotSupportedException: {operation} ");
}
return queryHandler.Find(collection, doc);
}
}
}

11
Src/Asp.NetCore2/MongoDb.Ado.data/ExecuteDbDataReaderItems/IQueryHandler.cs Normal file
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using MongoDB.Bson;
using MongoDB.Driver;
using System.Data.Common;
namespace MongoDb.Ado.data
{
public interface IQueryHandler
{
DbDataReader Find(IMongoCollection<BsonDocument> collection, BsonValue doc);
}
}

27
Src/Asp.NetCore2/MongoDb.Ado.data/ExecuteDbDataReaderItems/QueryAggregateHandler.cs Normal file
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using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Text;
namespace MongoDb.Ado.data
{
public class QueryAggregateHandler : IQueryHandler
{
public DbDataReader Find(IMongoCollection<BsonDocument> collection, BsonValue doc)
{
// 解析 JSON 字符串为 BsonArray
var pipeline = doc.AsBsonArray; ;
// 构建聚合管道
var aggregateFluent = collection.Aggregate<BsonDocument>(pipeline.Select(stage => new BsonDocument(stage.AsBsonDocument)).ToArray());
// 执行聚合查询并返回 DbDataReader
var cursor = aggregateFluent.ToList();
return new MongoDbBsonDocumentDataReader(cursor);
}
}
}

43
Src/Asp.NetCore2/MongoDb.Ado.data/ExecuteDbDataReaderItems/QueryFindHandler.cs Normal file
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using MongoDB.Bson;
using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Text;
namespace MongoDb.Ado.data
{
public class QueryFindHandler : IQueryHandler
{
public DbDataReader Find(IMongoCollection<BsonDocument> collection, BsonValue doc)
{
BsonDocument filter;
BsonDocument projection = null;
if (doc.IsBsonArray)
{
var array = doc.AsBsonArray;
filter = array.Count > 0 ? array[0].AsBsonDocument : new BsonDocument();
if (array.Count > 1)
projection = array[1].AsBsonDocument;
}
else if (doc.IsBsonDocument)
{
filter = doc.AsBsonDocument;
}
else
{
throw new ArgumentException("Invalid JSON format for MongoDB find operation.");
}
var findFluent = collection.Find(filter);
if (projection != null)
findFluent = findFluent.Project<BsonDocument>(projection);
var cursor = findFluent.ToCursor(); // 已包含 filter + projection 的结果
return new MongoDbIAsyncCursorDataReader(cursor); // 你要确保这个类支持逐行读取 BsonDocument
}
}
}