Exemple #1
0
        public async Task IgnoreCase()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync($"drop table if exists {Escape}test{Escape}.{Escape}IgnoreCase{Escape};");

                var services = SpiderProvider.Value.CreateScopeServiceProvider();
                var storage  = (RelationalDatabaseEntityStorageBase)CreateStorage(StorageType.Insert);
                storage.IgnoreCase = false;
                var dfc      = new DataFlowContext(null, services);
                var typeName = typeof(CreateTableEntity7).FullName;
                var entity   = new CreateTableEntity7();
                dfc.Add(typeName, entity.GetTableMetadata());
                var items = new ParseResult <CreateTableEntity7>
                {
                    entity
                };
                dfc.AddParseData(typeName, items);
                await storage.HandleAsync(dfc);

                var list = (await conn.QueryAsync <CreateTableEntity7>(
                                $"SELECT * FROM {Escape}test{Escape}.{Escape}IgnoreCase{Escape}")).ToList();
                Assert.Single(list);
                entity = list.First();
                Assert.Equal("xxx", entity.Str1);
                Assert.Equal("yyy", entity.Str2);
                Assert.Equal(655, entity.Required);
                Assert.Equal(0, entity.Decimal);
                Assert.Equal(600, entity.Long);
                Assert.Equal(400, entity.Double);
                Assert.Equal(200.0F, entity.Float);
                await conn.ExecuteAsync($"drop table if exists {Escape}test{Escape}.{Escape}IgnoreCase{Escape};");
            }
        }
Exemple #2
0
 protected virtual void RegisterMetadata(DataFlowContext context)
 {
     if (!context.Contains(Model.TypeName))
     {
         context.Add(Model.TypeName, TableMetadata);
     }
 }
        public async Task Store_Should_Success()
        {
            var serviceProvider = Mock.Of <IServiceProvider>();

            var mongoCollection = new Mock <IMongoCollection <BsonDocument> >();

            var mongoDatabase = new Mock <IMongoDatabase>();

            mongoDatabase.Setup(d =>
                                d.GetCollection <BsonDocument>(It.IsAny <string>(), It.IsAny <MongoCollectionSettings>()))
            .Returns(mongoCollection.Object);

            var mongoClient = new Mock <IMongoClient>();

            mongoClient.Setup(d => d.GetDatabase(It.IsAny <string>(), It.IsAny <MongoDatabaseSettings>()))
            .Returns(mongoDatabase.Object);

            var mongoEntityStorage = new MongoEntityStorage(mongoClient.Object);

            var tableMetadata = new TableMetadata {
                Schema = new Schema("db", "table")
            };

            var dataFlowContext = new DataFlowContext(serviceProvider);

            dataFlowContext.Add("table", tableMetadata);
            dataFlowContext.AddItem("table", new object[] { new Dictionary <string, object> {
                                                                { "Name", "Value" }
                                                            } });

            var result = await mongoEntityStorage.HandleAsync(dataFlowContext);

            Assert.Equal(DataFlowResult.Success, result);
        }
Exemple #4
0
        public async Task CreateTableNoSchema()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync("drop table if exists createtableentity1;");

                var services = SpiderProvider.Value.CreateScopeServiceProvider();
                var storage  = CreateStorage(StorageType.Insert);
                var dfc      = new DataFlowContext(null, services);
                var typeName = typeof(CreateTableEntity1).FullName;
                var entity   = new CreateTableEntity1();
                dfc.Add(typeName, entity.GetTableMetadata());
                var items = new ParseResult <CreateTableEntity1>
                {
                    entity
                };
                dfc.AddParseItem(typeName, items);
                await storage.HandleAsync(dfc);

                var list = (await conn.QueryAsync <CreateTableEntity1>("SELECT * FROM createtableentity1")).ToList();
                Assert.Single(list);
                entity = list.First();
                Assert.Equal("xxx", entity.Str1);
                Assert.Equal("yyy", entity.Str2);
                Assert.Equal(655, entity.Required);
                Assert.Equal(0, entity.Decimal);
                Assert.Equal(600, entity.Long);
                Assert.Equal(400, entity.Double);
                Assert.Equal(200.0F, entity.Float);
                await conn.ExecuteAsync("drop table if exists createtableentity1;");
            }
        }
        public async Task UpdatePartColumns()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync(
                    $"drop table if exists {Escape}test{Escape}.{Escape}updatepartcolumns{Escape};");

                using (var builder = GetLocalSpiderHostBuilder())
                {
                    var provider = builder.Build();
                    var services = provider.CreateScopeServiceProvider();
                    var storage  = CreateStorage(StorageType.InsertIgnoreDuplicate);
                    var dfc      = new DataFlowContext(null, services);
                    var typeName = typeof(CreateTableEntity6).FullName;
                    var entity   = new CreateTableEntity6();
                    dfc.Add(typeName, entity.GetTableMetadata());
                    var items = new ParseResult <CreateTableEntity6> {
                        entity
                    };
                    dfc.AddParseData(typeName, items);
                    await storage.HandleAsync(dfc);

                    var dfc2 = new DataFlowContext(null, services);
                    dfc2.Add(typeName, entity.GetTableMetadata());
                    var now = DateTime.Now;
                    dfc2.AddParseData(typeName,
                                      new ParseResult <CreateTableEntity6>
                    {
                        new CreateTableEntity6
                        {
                            Str1           = "TTT",
                            DateTime       = now,
                            DateTimeOffset = now,
                            Double         = 888,
                            Float          = 999F,
                            Required       = 888
                        }
                    });
                    var storage2 = CreateStorage(StorageType.Update);
                    await storage2.HandleAsync(dfc2);

                    var list = (await conn.QueryAsync <CreateTableEntity6>(
                                    $"SELECT * FROM {Escape}test{Escape}.{Escape}updatepartcolumns{Escape}"))
                               .ToList();
                    Assert.Single(list);
                    entity = list.First();
                    Assert.Equal("TTT", entity.Str1);
                    Assert.Equal("yyy", entity.Str2);
                    Assert.Equal(655, entity.Required);
                    Assert.Equal(0, entity.Decimal);
                    Assert.Equal(600, entity.Long);
                    Assert.Equal(888, entity.Double);
                    Assert.Equal(200.0F, entity.Float);

                    await conn.ExecuteAsync(
                        $"drop table if exists {Escape}test{Escape}.{Escape}updatepartcolumns{Escape};");
                }
            }
        }
        public async Task Store_Should_Success()
        {
            var serviceProvider = Mock.Of <IServiceProvider>();

            var mongoCollection = new Mock <IMongoCollection <BsonDocument> >();

            var mongoDatabase = new Mock <IMongoDatabase>();

            mongoDatabase.Setup(d =>
                                d.GetCollection <BsonDocument>(It.IsAny <string>(), It.IsAny <MongoCollectionSettings>()))
            .Returns(mongoCollection.Object);

            var mongoClient = new Mock <IMongoClient>();

            mongoClient.Setup(d => d.GetDatabase(It.IsAny <string>(), It.IsAny <MongoDatabaseSettings>()))
            .Returns(mongoDatabase.Object);

            var mongoEntityStorage = new MongoEntityStorage(mongoClient.Object);

            var dfc      = new DataFlowContext(null, serviceProvider);
            var typeName = typeof(CreateTableEntity1).FullName;
            var entity   = new CreateTableEntity1();

            dfc.Add(typeName, entity.GetTableMetadata());
            var items = new ParseResult <CreateTableEntity1>
            {
                entity
            };

            dfc.AddParseData(typeName, items);
            var result = await mongoEntityStorage.HandleAsync(dfc);

            Assert.Equal(DataFlowResult.Success, result);
        }
 protected override Task <DataFlowResult> Parse(DataFlowContext context)
 {
     if (!context.Contains(Model.TypeName))
     {
         context.Add(Model.TypeName, TableMetadata);
     }
     return(Task.FromResult(DataFlowResult.Success));
 }
Exemple #8
0
        public async Task UpdateAllColumns()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync("drop table if exists `test`.`createtableprimay`;");

                var services = SpiderFactory.CreateScopeServiceProvider();
                var storage  = CreateStorage(StorageType.InsertIgnoreDuplicate);
                var dfc      = new DataFlowContext(null, services);
                var typeName = typeof(CreateTableEntity4).FullName;
                var entity   = new CreateTableEntity4();
                dfc.Add(typeName, entity.GetTableMetadata());
                var items = new ParseResult <CreateTableEntity4>
                {
                    entity
                };
                dfc.AddParseItem(typeName, items);

                await storage.HandleAsync(dfc);

                var dfc2 = new DataFlowContext(null, services);
                dfc2.Add(typeName, entity.GetTableMetadata());
                var now = DateTime.Now;
                dfc2.AddParseItem(typeName, new ParseResult <CreateTableEntity4>
                {
                    new CreateTableEntity4
                    {
                        Str1           = "TTT",
                        DateTime       = now,
                        DateTimeOffset = now,
                        Double         = 888
                    }
                });
                var storage2 = CreateStorage(StorageType.Update);
                await storage2.HandleAsync(dfc2);

                var list = (await conn.QueryAsync <CreateTableEntity4>("SELECT * FROM `test`.`createtableprimay`"))
                           .ToList();
                Assert.Single(list);
                entity = list.First();
                Assert.Equal("TTT", entity.Str1);
                Assert.Equal("yyy", entity.Str2);
                Assert.Equal(655, entity.Required);
                Assert.Equal(0, entity.Decimal);
                Assert.Equal(600, entity.Long);
                Assert.Equal(888, entity.Double);
                Assert.Equal(200.0F, entity.Float);

                await conn.ExecuteAsync("drop table if exists `test`.`createtableprimay`;");
            }
        }
        public async Task AutoIncPrimary()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync(
                    $"drop table if exists {Escape}test{Escape}.{Escape}createtableautoincprimay{Escape};");

                using (var builder = GetLocalSpiderHostBuilder())
                {
                    var provider = builder.Build();
                    var services = provider.CreateScopeServiceProvider();
                    var storage  = CreateStorage(StorageType.Insert);
                    var dfc      = new DataFlowContext(null, services);
                    var typeName = typeof(CreateTableEntity5).FullName;
                    var entity   = new CreateTableEntity5();
                    dfc.Add(typeName, entity.GetTableMetadata());
                    var items = new ParseResult <CreateTableEntity5> {
                        entity, entity
                    };
                    dfc.AddParseData(typeName, items);
                    await storage.HandleAsync(dfc);

                    var list =
                        (await conn.QueryAsync <CreateTableEntity5>(
                             $"SELECT * FROM {Escape}test{Escape}.{Escape}createtableautoincprimay{Escape}"))
                        .ToList();
                    Assert.Equal(2, list.Count);
                    entity = list.First();
                    Assert.Equal("xxx", entity.Str1);
                    Assert.Equal("yyy", entity.Str2);
                    Assert.Equal(655, entity.Required);
                    Assert.Equal(0, entity.Decimal);
                    Assert.Equal(600, entity.Long);
                    Assert.Equal(400, entity.Double);
                    Assert.Equal(200.0F, entity.Float);
                    Assert.Equal(1, entity.Id);
                    Assert.Equal(2, list[1].Id);

                    var primaries = (await conn.QueryAsync <PrimaryInfo>(
                                         "SELECT t.CONSTRAINT_TYPE, c.COLUMN_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS t, INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS c WHERE t.TABLE_NAME = c.TABLE_NAME AND t.TABLE_SCHEMA = 'test' AND t.CONSTRAINT_TYPE = 'PRIMARY KEY' AND t.TABLE_NAME='createtableautoincprimay';")
                                     ).ToList();
                    Assert.Single(primaries);
                    Assert.Equal("id", primaries[0].COLUMN_NAME);
                    await conn.ExecuteAsync(
                        $"drop table if exists {Escape}test{Escape}.{Escape}createtableautoincprimay{Escape};");
                }
            }
        }
Exemple #10
0
        public async Task CreateTableAutoIncPrimary()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync("drop table if exists test.dbo.createtableautoincprimay;");

                using (var builder = GetLocalSpiderHostBuilder())
                {
                    var provider = builder.Build();
                    var services = provider.CreateScopeServiceProvider();
                    var storage  = CreateStorage(StorageType.Insert);
                    var dfc      = new DataFlowContext(null, services);
                    var typeName = typeof(CreateTableEntity5).FullName;
                    var entity   = new CreateTableEntity5();
                    dfc.Add(typeName, entity.GetTableMetadata());
                    var items = new ParseResult <CreateTableEntity5> {
                        entity, entity
                    };
                    dfc.AddParseData(typeName, items);
                    await storage.HandleAsync(dfc);

                    var list =
                        (await conn.QueryAsync <CreateTableEntity5>("SELECT * FROM test.dbo.createtableautoincprimay"))
                        .ToList();
                    Assert.Equal(2, list.Count);
                    entity = list.First();
                    Assert.Equal("xxx", entity.Str1);
                    Assert.Equal("yyy", entity.Str2);
                    Assert.Equal(655, entity.Required);
                    Assert.Equal(0, entity.Decimal);
                    Assert.Equal(600, entity.Long);
                    Assert.Equal(400, entity.Double);
                    Assert.Equal(200.0F, entity.Float);
                    Assert.Equal(1, entity.Id);
                    Assert.Equal(2, list[1].Id);

                    var primaries = (await conn.QueryAsync <IndexInfo>
                                         (@"USE test; EXEC sp_pkeys @table_name='createtableautoincprimay'")
                                     ).ToList();
                    Assert.Single(primaries);
                    Assert.Equal("id", primaries[0].COLUMN_NAME);
                    Assert.Equal(1, primaries[0].KEY_SEQ);
                    await conn.ExecuteAsync("drop table if exists test.dbo.createtableautoincprimay;");
                }
            }
        }
        public async Task Indexes()
        {
            using (var conn = CreateConnection())
            {
                await conn.ExecuteAsync(
                    $"drop table if exists {Escape}test{Escape}.{Escape}createtableindexes{Escape};");

                using (var builder = GetLocalSpiderHostBuilder())
                {
                    var provider = builder.Build();
                    var services = provider.CreateScopeServiceProvider();
                    var storage  = CreateStorage(StorageType.Insert);

                    var dfc      = new DataFlowContext(null, services);
                    var typeName = typeof(CreateTableEntity5).FullName;
                    var entity   = new CreateTableEntity9();
                    dfc.Add(typeName, entity.GetTableMetadata());
                    var items = new ParseResult <CreateTableEntity9> {
                        entity
                    };
                    dfc.AddParseData(typeName, items);
                    await storage.HandleAsync(dfc);

                    var indexes = (await conn.QueryAsync <IndexInfo>
                                       ("show index from test.createtableindexes")
                                   ).ToList();
                    Assert.Equal(6, indexes.Count);
                    Assert.Contains(indexes,
                                    x => x.Key_name == "INDEX_STR1" && x.Non_unique == 1 && x.Column_name == "str1");
                    Assert.Contains(indexes, x =>
                                    x.Key_name == "INDEX_STR1_STR2" && x.Non_unique == 1 && x.Column_name == "str1");
                    Assert.Contains(indexes, x =>
                                    x.Key_name == "INDEX_STR1_STR2" && x.Non_unique == 1 && x.Column_name == "str2");
                    Assert.Contains(indexes,
                                    x => x.Key_name == "UNIQUE_STR3" && x.Non_unique == 0 && x.Column_name == "str3");
                    Assert.Contains(indexes, x =>
                                    x.Key_name == "UNIQUE_STR3_STR4" && x.Non_unique == 0 && x.Column_name == "str3");
                    Assert.Contains(indexes, x =>
                                    x.Key_name == "UNIQUE_STR3_STR4" && x.Non_unique == 0 && x.Column_name == "str4");

                    await conn.ExecuteAsync(
                        $"drop table if exists {Escape}test{Escape}.{Escape}createtableindexes{Escape};");
                }
            }
        }
Exemple #12
0
            //public DatabaseSpiderDataParser()
            //{
            //	CanParse = DataParserHelper.CanParseByRegex("cnblogs\\.com");
            //	QueryFollowRequests = DataParserHelper.QueryFollowRequestsByXPath(".");
            //}

            protected override Task <DataFlowResult> Parse(DataFlowContext context)
            {
                context.AddData("URL", context.Response.Request.Url);
                context.AddData("Title", context.Selectable.XPath(".//title").GetValue());

                #region add mysql database
                var typeName = typeof(EntitySpider.CnblogsEntry).FullName;
                var entity   = new EntitySpider.CnblogsEntry();
                context.Add(typeName, entity.GetTableMetadata());
                ParseResult <EntitySpider.CnblogsEntry> items = new ParseResult <EntitySpider.CnblogsEntry>();
                entity.WebSite = context.Response.Request.Url;
                entity.Url     = context.Response.Request.Url;
                entity.Title   = context.Selectable.XPath(".//title").GetValue();
                items.Add(entity);
                context.AddParseData(typeName, items);
                #endregion
                return(Task.FromResult(DataFlowResult.Success));
            }
        public async Task InsertAndUpdate()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync(
                    $"drop table if exists {Escape}test{Escape}.{Escape}createtableprimay{Escape};");

                using (var builder = GetLocalSpiderHostBuilder())
                {
                    var provider = builder.Build();
                    var services = provider.CreateScopeServiceProvider();
                    var storage  = CreateStorage(StorageType.InsertAndUpdate);
                    var dfc      = new DataFlowContext(null, services);
                    var typeName = typeof(CreateTableEntity4).FullName;
                    var entity   = new CreateTableEntity4();
                    dfc.Add(typeName, entity.GetTableMetadata());
                    var items = new ParseResult <CreateTableEntity4> {
                        entity, new CreateTableEntity4 {
                            Str1 = "zzz"
                        }
                    };
                    dfc.AddParseData(typeName, items);

                    await storage.HandleAsync(dfc);

                    var list = (await conn.QueryAsync <CreateTableEntity4>(
                                    $"SELECT * FROM {Escape}test{Escape}.{Escape}createtableprimay{Escape}"))
                               .ToList();
                    Assert.Single(list);
                    entity = list.First();
                    Assert.Equal("zzz", entity.Str1);
                    Assert.Equal("yyy", entity.Str2);
                    Assert.Equal(655, entity.Required);
                    Assert.Equal(0, entity.Decimal);
                    Assert.Equal(600, entity.Long);
                    Assert.Equal(400, entity.Double);
                    Assert.Equal(200.0F, entity.Float);

                    await conn.ExecuteAsync(
                        $"drop table if exists {Escape}test{Escape}.{Escape}createtableprimay{Escape};");
                }
            }
        }
        public async Task Store_Empty_Should_Success()
        {
            var serviceProvider    = Mock.Of <IServiceProvider>();
            var mongoClient        = new Mock <IMongoClient>();
            var mongoEntityStorage = new MongoEntityStorage(mongoClient.Object);

            var dfc      = new DataFlowContext(null, serviceProvider);
            var typeName = typeof(CreateTableEntity1).FullName;
            var entity   = new CreateTableEntity1();

            dfc.Add(typeName, entity.GetTableMetadata());
            var items = new ParseResult <CreateTableEntity1>();

            dfc.AddParseData(typeName, items);

            var result = await mongoEntityStorage.HandleAsync(dfc);

            Assert.Equal(DataFlowResult.Success, result);
        }
Exemple #15
0
        public async Task CreateTablePrimary()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync("drop table if exists `test`.`createtableprimay`;");

                var services = SpiderFactory.CreateScopeServiceProvider();
                var storage  = CreateStorage(StorageType.Insert);
                var dfc      = new DataFlowContext(null, services);
                var typeName = typeof(CreateTableEntity4).FullName;
                var entity   = new CreateTableEntity4();
                dfc.Add(typeName, entity.GetTableMetadata());
                var items = new ParseResult <CreateTableEntity4>
                {
                    entity
                };
                dfc.AddParseItem(typeName, items);
                await storage.HandleAsync(dfc);

                var list = (await conn.QueryAsync <CreateTableEntity4>("SELECT * FROM `test`.`createtableprimay`"))
                           .ToList();
                Assert.Single(list);
                entity = list.First();
                Assert.Equal("xxx", entity.Str1);
                Assert.Equal("yyy", entity.Str2);
                Assert.Equal(655, entity.Required);
                Assert.Equal(0, entity.Decimal);
                Assert.Equal(600, entity.Long);
                Assert.Equal(400, entity.Double);
                Assert.Equal(200.0F, entity.Float);

                var primaries = (await conn.QueryAsync <IndexInfo>
                                     (@"SELECT t.CONSTRAINT_TYPE, c.COLUMN_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS t, INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS c 
                    WHERE t.TABLE_NAME = c.TABLE_NAME AND t.TABLE_SCHEMA = 'test' AND t.CONSTRAINT_TYPE = 'PRIMARY KEY' AND t.TABLE_NAME='createtableprimay';")
                                 ).ToList();
                Assert.Single(primaries);
                Assert.Equal("str2", primaries[0].COLUMN_NAME);
                await conn.ExecuteAsync("drop table if exists `test`.`createtableprimay`;");
            }
        }
Exemple #16
0
        public async Task UseTransaction()
        {
            using (var conn = CreateConnection())
            {
                // 如果实体的 Schema 没有配置表名,则使用类名
                await conn.ExecuteAsync("drop table if exists test.dbo.createtableprimay;");

                using (var builder = GetLocalSpiderHostBuilder())
                {
                    var provider = builder.Build();
                    var services = provider.CreateScopeServiceProvider();
                    var storage  = (RelationalDatabaseEntityStorageBase)CreateStorage(StorageType.InsertIgnoreDuplicate);
                    storage.UseTransaction = true;
                    var dfc      = new DataFlowContext(null, services);
                    var typeName = typeof(CreateTableEntity4).FullName;
                    var entity   = new CreateTableEntity4();
                    dfc.Add(typeName, entity.GetTableMetadata());
                    var items = new ParseResult <CreateTableEntity4> {
                        entity, entity, entity
                    };
                    dfc.AddParseData(typeName, items);
                    await storage.HandleAsync(dfc);

                    var list = (await conn.QueryAsync <CreateTableEntity4>("SELECT * FROM test.dbo.createtableprimay"))
                               .ToList();
                    Assert.Single(list);
                    entity = list.First();
                    Assert.Equal("xxx", entity.Str1);
                    Assert.Equal("yyy", entity.Str2);
                    Assert.Equal(655, entity.Required);
                    Assert.Equal(0, entity.Decimal);
                    Assert.Equal(600, entity.Long);
                    Assert.Equal(400, entity.Double);
                    Assert.Equal(200.0F, entity.Float);

                    await conn.ExecuteAsync("drop table if exists test.dbo.createtableprimay;");
                }
            }
        }
Exemple #17
0
        protected override Task <DataFlowResult> Parse(DataFlowContext context)
        {
            if (!context.Contains(_model.TypeName))
            {
                context.Add(_model.TypeName, _tableMetadata);
            }

            var selectable = context.GetSelectable();
            var results    = new ParseResult <T>();

            if (selectable.Properties == null)
            {
                selectable.Properties = new Dictionary <string, object>();
            }

            var environments = new Dictionary <string, string>();

            foreach (var property in context.Response.Request.Properties)
            {
                environments.Add(property.Key, property.Value);
            }

            if (_model.ShareValueSelectors != null)
            {
                foreach (var selector in _model.ShareValueSelectors)
                {
                    string name  = selector.Name;
                    var    value = selectable.Select(selector.ToSelector()).GetValue();
                    if (!environments.ContainsKey(name))
                    {
                        environments.Add(name, value);
                    }
                    else
                    {
                        environments[name] = value;
                    }
                }
            }

            bool singleExtractor = _model.Selector == null;

            if (!singleExtractor)
            {
                var selector = _model.Selector.ToSelector();

                var list = selectable.SelectList(selector).Nodes()?.ToList();
                if (list != null)
                {
                    if (_model.Take > 0 && list.Count > _model.Take)
                    {
                        list = _model.TakeFromHead
                                                        ? list.Take(_model.Take).ToList()
                                                        : list.Skip(list.Count - _model.Take).ToList();
                    }

                    for (var i = 0; i < list.Count; ++i)
                    {
                        var item = list.ElementAt(i);
                        var obj  = ParseObject(environments, item, i);
                        if (obj != null)
                        {
                            results.Add(obj);
                        }
                        else
                        {
                            Logger?.LogWarning($"解析到空数据,类型: {_model.TypeName}");
                        }
                    }
                }
            }
            else
            {
                var obj = ParseObject(environments, selectable, 0);
                if (obj != null)
                {
                    results.Add(obj);
                }
                else
                {
                    Logger?.LogWarning($"解析到空数据,类型: {_model.TypeName}");
                }
            }

            if (results.Count > 0)
            {
                var items = context.GetParseItem(_model.TypeName);
                if (items == null)
                {
                    context.AddParseItem(_model.TypeName, results);
                }
                else
                {
                    ((ParseResult <T>)items).AddRange(results);
                }
            }

            return(Task.FromResult(DataFlowResult.Success));
        }