protected virtual void RegisterMetadata(DataFlowContext context) { if (!context.Contains(Model.TypeName)) { context.Add(Model.TypeName, TableMetadata); } }
protected override Task <DataFlowResult> Parse(DataFlowContext context) { if (!context.Contains(Model.TypeName)) { context.Add(Model.TypeName, TableMetadata); } return(Task.FromResult(DataFlowResult.Success)); }
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)); }