public void Load(TableInfo table_info)
{
this.row_map = table_info.DataMap;
foreach (string index in table_info.Index)
{
this.index_map[index] = new IndexData();
}
this.ReflushIndex();
}
public Dictionary <string, string> Select(string condition)
{
RowMap search_row_map = this.Filter(condition, "Select", false);
Dictionary <string, string> data = new Dictionary <string, string>();
foreach (KeyValuePair <string, RowData> pair in search_row_map)
{
data[pair.Key] = this.RowDataToJson(pair.Value);
}
return(data);
}
public Dictionary <string, string> Delete(string condition)
{
RowMap search_row_map = this.Filter(condition, "Delete", true);
Dictionary <string, string> data = new Dictionary <string, string>();
foreach (KeyValuePair <string, RowData> pair in search_row_map)
{
this.row_map.Remove(pair.Key);
this.OnRemoveRowData(pair.Key, pair.Value);
data[pair.Key] = this.RowDataToJson(pair.Value);
}
return(data);
}
public Dictionary <string, string> Update(string condition, string json)
{
RowMap search_row_map = this.Filter(condition, "Update", true);
Dictionary <string, string> data = new Dictionary <string, string>();
foreach (KeyValuePair <string, RowData> pair in search_row_map)
{
this.OnRemoveRowData(pair.Key, this.row_map[pair.Key]);
this.row_map[pair.Key] = this.JsonToRowData(json);
this.OnAddRowData(pair.Key, this.row_map[pair.Key]);
data[pair.Key] = this.RowDataToJson(this.row_map[pair.Key]);
}
return(data);
}
private RowMap Filter(string condition, string handle, bool is_warn = false)
{
JObject cond = (JObject)JsonConvert.DeserializeObject(condition);
RowMap search_row_map = new RowMap();
//有指定UID先筛选
if (cond.ContainsKey("UID"))
{
JObject target = (JObject)JsonConvert.DeserializeObject(cond["UID"].ToString());
if (target["op"].ToString().Equals("=="))
{
string uid = target["value"].ToString();
if (!this.row_map.ContainsKey(uid))
{
if (is_warn)
{
throw new Exception(string.Format("{0} Table:{1} Error | Not Exist Uid:{2}", handle, this.table_name, uid));
}
return(search_row_map);
}
search_row_map[uid] = this.row_map[uid];
}
else
{
search_row_map = this.row_map;
}
}
else
{
search_row_map = this.row_map;
}
//筛选条件先与后或
if (cond.Count > (cond.ContainsKey("$or") ? 1 : 0))
{
search_row_map = this.FilterCondition(search_row_map, cond, true);
}
if (cond.ContainsKey("$or") && ((JObject)cond["$or"]).Count > 0)
{
search_row_map = this.FilterCondition(search_row_map, (JObject)cond["$or"], false);
}
return(search_row_map);
}
private RowMap FilterCondition(RowMap search_row_map, JObject cond, bool and_cond)
{
bool need_check = false;
//先用索引筛选一遍
RowMap and_filter_map = search_row_map;
RowMap or_filter_map = new RowMap();
foreach (KeyValuePair <string, JToken> pair in cond)
{
if (!pair.Key.Equals("$or"))
{
string value = pair.Value.ToString();
if (this.index_map.ContainsKey(pair.Key))
{
if (!this.index_map[pair.Key].ContainsKey(value))
{
//与条件筛选出的数据为空
if (and_cond)
{
return(new RowMap());
}
}
else
{
RowMap filter_row_map = new RowMap();
foreach (string uid in this.index_map[pair.Key][value])
{
if (search_row_map.ContainsKey(uid))
{
if (and_cond)
{
if (and_filter_map.ContainsKey(uid))
{
filter_row_map[uid] = this.row_map[uid];
}
}
else
{
or_filter_map[uid] = this.row_map[uid];
}
}
}
and_filter_map = filter_row_map;
}
}
else
{
need_check = true;
}
}
}
//存在没有索引的条件，需要遍历判断
if (need_check)
{
RowMap filter_row_map = new RowMap();
foreach (KeyValuePair <string, RowData> pair in search_row_map)
{
string uid = pair.Key;
if (this.CheckCondition(uid, pair.Value, cond, and_cond))
{
filter_row_map[uid] = this.row_map[uid];
}
}
search_row_map = filter_row_map;
}
return(search_row_map);
}
