public static OperationParameter GetOperationParameter(JObject token)
{
var result = new OperationParameter();
if (token != null)
{
foreach (var item in token)
{
Parse(item.Key, item.Value, result);
}
}
return(result);
}
private static void Parse(string key, JToken value, OperationParameter result)
{
if (key == PaginationParameter.Key)
{
var param = value as JArray;
if (param == null || param.Count != 2)
{
throw new ParameterParseException("The pagination shuold have page index and page size parameters.");
}
result.PaginationParameter = new PaginationParameter()
{
Size = param[0].Value <int>(),
Index = param[1].Value <int>()
};
}
else if (key == OrderParameter.Key)
{
List <IColumnObject> colObjs = new List <IColumnObject>();
var cols = value as JArray;
if (cols != null && cols.Count > 0)
{
for (var i = 0; i < cols.Count; i++)
{
var col = cols[i];
if (col is JValue)
{
colObjs.Add(new SimpleColumnObjectInOrder()
{
Name = col.Value <string>(), IsDesc = false
});
}
else
{
var complexCol = col as JObject;
if (complexCol == null || string.IsNullOrEmpty(complexCol.Value <string>("$name")))
{
throw new Exception("Order指令中复杂字段对象必须包含$name属性");
}
else
{
var item = new ComplexColumnObjectInOrder()
{
Name = complexCol["$name"].ToString()
};
if (!string.IsNullOrEmpty(complexCol.Value <string>("$aggregation")))
{
item.Aggregation = complexCol.Value <string>("$aggregation").ToAggregationType();
if (item.Aggregation == null)
{
throw new Exception("聚合指令无法识别！");
}
}
if (!string.IsNullOrEmpty(complexCol.Value <string>("$desc")))
{
item.IsDesc = complexCol.Value <bool>("$desc");
}
colObjs.Add(item);
}
}
}
result.OrderParameter = new OrderParameter(colObjs);
}
}
else if (key == OperationParameter.WhereParameterKey)
{
var conditions = value as JObject;
if (conditions.Count != 1)
{
throw new Exception("Where条件语法错误，只能使用一个组合查询组合或者一个基本条件指令！");
}
else if (conditions.Count == 1)
{
var conKey = (conditions as IDictionary <string, JToken>).Keys.First();
if (BaseConditionParameter.IsConditionParameter(conKey))
{
result.WhereParameter = BaseConditionParameter.TranslateByDictionary(conKey, conditions[conKey], false);
}
else if (LinkConditionParameter.IsLinkConditionParameter(conKey))
{
result.WhereParameter = LinkConditionParameter.TranslateByDictionary(conKey, conditions[conKey], false);
}
else
{
throw new Exception("Where条件语法错误，条件指令未能识别！");
}
}
}
else if (key == OperationParameter.GroupByParameterKey)
{
var cols = value as JArray;
if (cols == null)
{
throw new Exception("GroupBy语法错误，内容为字段字符串数组！");
}
var list = cols.Select(j => j.ToString()).ToList();
result.GroupByParameter = list;
}
else if (key == OperationParameter.HavingParameterKey)
{
var conditions = value as JObject;
if (conditions.Count != 1)
{
throw new Exception("Having条件语法错误，只能使用一个组合查询组合或者一个基本条件指令！");
}
else if (conditions.Count == 1)
{
var conKey = (conditions as IDictionary <string, JToken>).Keys.First();
if (BaseConditionParameter.IsConditionParameter(conKey))
{
result.HavingParameter = BaseConditionParameter.TranslateByDictionary(conKey, conditions[conKey], true);
}
else if (LinkConditionParameter.IsLinkConditionParameter(conKey))
{
result.HavingParameter = LinkConditionParameter.TranslateByDictionary(conKey, conditions[conKey], true);
}
else
{
throw new Exception("Having条件语法错误，条件指令未能识别！");
}
}
}
else if (key == OperationParameter.IncludesParameterKey)
{
var colObjs = value as JArray;
if (colObjs == null)
{
throw new Exception("Includes字段筛选语法错误，内容只能是字段对象数组！");
}
if (colObjs.Count > 0)
{
if (result.ExcludesColumnParameter != null)
{
throw new Exception("Includes不能与Excludes同时使用！");
}
var cols = new List <IColumnObject>();
for (var i = 0; i < colObjs.Count; i++)
{
var colObj = colObjs[i];
if (colObj is JValue)
{
cols.Add(new SimpleColumnObject()
{
Name = colObj.Value <string>()
});
}
else
{
var colDic = colObj as JObject;
if (colDic == null || string.IsNullOrEmpty(colDic.Value <string>("$name")))
{
throw new Exception("Includes中字段对象定义错误，如果是复杂字段对象，必须包含$name属性！");
}
var cc = new ComplexColumnObject();
cc.Name = colDic.Value <string>("$name");
if (!string.IsNullOrEmpty(colDic.Value <string>("$distinct")))
{
cc.IsDistinct = colDic.Value <bool>("$distinct");
}
if (!string.IsNullOrEmpty(colDic.Value <string>("$aggregation")))
{
cc.Aggregation = colDic.Value <string>("$aggregation").ToAggregationType();
if (cc.Aggregation == null)
{
throw new Exception("Includes字段对象中存在未能识别的$aggregation指令！");
}
}
if (!string.IsNullOrEmpty(colDic.Value <string>("$alias")))
{
cc.Alias = colDic.Value <string>("$alias");
}
cols.Add(cc);
}
}
result.IncludesColumnParameter = cols;
}
}
else if (key == OperationParameter.ExcludesParameterKey)
{
var colObjs = value as JArray;
if (colObjs == null)
{
throw new Exception("Excludes字段筛选语法错误，内容只能是字段对象数组！");
}
if (colObjs.Count > 0)
{
if (result.IncludesColumnParameter != null)
{
throw new Exception("Excludes不能与Includes同时使用！");
}
var cols = new List <SimpleColumnObject>();
for (var i = 0; i < colObjs.Count; i++)
{
var colObj = colObjs[i];
if (colObj is JArray)
{
cols.Add(new SimpleColumnObject()
{
Name = colObj.Value <string>()
});
}
else
{
throw new Exception("Excludes后面的数组只能是字段名称，不支持复杂的字段对象");
}
}
result.ExcludesColumnParameter = cols;
}
}
else
{
throw new ParameterParseException("Unknown parameter.");
}
}
