我有以下情況。我從探針獲取週數據。數據收集在幾個xml文件中(內聯在下面的代碼中)。我需要在一個文件中連接這些。雖然我把它們集中在一個可以進一步翻譯成單個文件的記錄中。如何處理嵌套記錄和列表箭頭
結果記錄我試圖抓住如下:
[YS {ser = "MSG"
, ori =[YO {site = "Bordeaux" , perfM = ["0","0"] }
,YO {site = "Paris" , perfM = ["1","1"]}]}
,YS {ser = "OTP"
, ori =[YO {site = "Marseilles" , perfM = ["20","20"]}
,YO {site = "Lyon" , perfM = ["21","21"]}]}
]
,你可以看到perfM收集所有提交的數據。
但下面的代碼給了我。
[YS {ser = "MSG"
, ori = [YO {site = "Bordeaux", perfM = ["0"]}
,YO {site = "Paris", perfM =["1"]}
,YO {site = "Bordeaux", perfM = ["0","0"]}
,YO {site = "Paris", perfM = ["1","1"]}]}
,YS {ser = "OTP"
, ori = [YO {site = "Marseilles"
, perfM = ["20"]}
,YO {site = "Lyon", perfM =["21"]}
,YO {site = "Marseilles", perfM = ["20","20"]}
,YO {site = "Lyon", perfM = ["21","21"]}]}
]
這真的不清楚我這裏發生了什麼,我應該在哪裏看看。我認爲它在getYearOri和addOri函數中,但到目前爲止,我所有的嘗試都可能失敗。
如果任何人都可以給我一個線索,要改變的代碼。
{-# LANGUAGE Arrows, NoMonomorphismRestriction #-}
import Text.XML.HXT.Core
type Site = String
type Service = String
data YScen = YS
{ ser :: Service
, ori :: [YOri]
}
deriving (Show,Eq)
data YOri = YO
{ site :: Site
,perfM :: [String]
}
deriving (Show,Eq)
xml= "<DATAS LANG='en'>\
\ <SCENARIO ID='MSG'>\
\ <ORIGIN ID='Bordeaux'>\
\ <SCENARIO_M PERF_MOY='0'></SCENARIO_M>\
\ </ORIGIN>\
\ <ORIGIN ID='Paris'>\
\ <SCENARIO_M PERF_MOY='1'></SCENARIO_M>\
\ </ORIGIN>\
\ </SCENARIO>\
\ <SCENARIO ID='OTP'>\
\ <ORIGIN ID='Marseilles'>\
\ <SCENARIO_M PERF_MOY='20'></SCENARIO_M>\
\ </ORIGIN>\
\ <ORIGIN ID='Lyon'>\
\ <SCENARIO_M PERF_MOY='21'></SCENARIO_M>\
\ </ORIGIN>\
\ </SCENARIO>\
\</DATAS>"
parseXML :: String -> IOStateArrow s b XmlTree
parseXML s = readString [ withValidate no
, withRemoveWS yes
] s
atTag :: ArrowXml a => String -> a XmlTree XmlTree
atTag tag = deep (isElem >>> hasName tag)
getYearOri :: ArrowXml cat => [YOri] -> cat XmlTree YOri
getYearOri yo = atTag "ORIGIN" >>>
proc tagSite -> do
siteName1 <- getAttrValue "ID" -< tagSite
tagScen_M <- atTag "SCENARIO_M" -< tagSite
perfM1 <- getAttrValue "PERF_MOY" -< tagScen_M
returnA -< addOri (YO siteName1 [perfM1]) yo
where
addOri::YOri -> [YOri]-> YOri
addOri o [] = o
addOri o (x:xs)
| site o == site x
= YO {site = site o
,perfM = (perfM x) ++ (perfM o)}
| otherwise = addOri o xs
getYearScen :: ArrowXml cat => [YScen] -> cat XmlTree YScen
getYearScen ys = atTag "SCENARIO" >>>
proc l -> do
scenName <- getAttrValue "ID" -< l
orig <- listA (getYearOri (concat (map ori ys))) -< l
returnA -< addScen (YS scenName orig) ys
where
addScen :: YScen -> [YScen] -> YScen
addScen sc [] = sc
addScen sc (x:xs)
| ser sc == ser x
= YS {ser=ser x
,ori=(ori x) ++ (ori sc)}
| otherwise = addScen sc xs
parse :: [YScen]-> IO [YScen]
parse ys = do
res <- runX (parseXML xml >>> getYearScen ys)
return res
ysc1 = [YS "" []]
test = do
ysc2 <- parse ysc1
ysc3 <- parse ysc2
return ysc3
是的,發佈我的問題後,延遲了8小時。我明天會做。 –