本文介绍了我如何替换HXT中的节点?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
给出一个示例xml文件: < root>
< tag attr =value>内容< / tag>
< tag attr =value2>内容< / tag>
< / root>
如何将每个标记
替换为不同的标签,所以我得到不同的文件:
< root>
< tag2 attr2 =value/>
< tag2 attr2 =value2/>
< / root>
文档[1]似乎使用了过滤器,是否有一种方法可以单独使用箭头来完成此操作?
更新
我现在处于i可以替换像这样的节点:$ b
$ b
runX $ readDocument []in.xml
>>> ; processTopDown(
(eelemtag2+ = sattrattr2XXX)
`when`(isElem>>> hasNametag))
>> > writeDocument []test.xml
但我不知道如何获取属性。
[1]
解决方案
从:
runX $ readDocument []in .xml>>>转换>>> writeDocument []test.xml
其中
transform = processTopDown $
(setElemName(mkNametag2)>>>
processAttrl(changeAttrName $ mkName.attrMap 。localPart)
)`when`(isElem>>> hasNametag)
attrMapattr=attr2
attrMap a = a
这适用于我的示例文档。
Given a sample xml file:
<root>
<tag attr="value">Content</tag>
<tag attr="value2">Content</tag>
</root>
how do i replace every tag
with a different tag so i get a different file:
<root>
<tag2 attr2="value"/>
<tag2 attr2="value2"/>
</root>
The documentation [1] seems to use Filters, is there a way to accomplish this with arrows alone?
Update
i am now at the point where i can replace a node like this:
runX $ readDocument [] "in.xml"
>>> processTopDown(
(eelem "tag2" += sattr "attr2" "XXX" )
`when` (isElem >>> hasName "tag") )
>>> writeDocument [] "test.xml"
but i have no idea on how to get the attribute right.
[1] http://www.haskell.org/haskellwiki/HXT#Transform_external_references_into_absolute_reference
解决方案
Try setElemName
, processAttrl
, and changeAttrName
from Text.XML.HXT.XmlArrow
:
runX $ readDocument [] "in.xml" >>> transform >>> writeDocument [] "test.xml"
where
transform = processTopDown $
( setElemName (mkName "tag2") >>>
processAttrl (changeAttrName $ mkName . attrMap . localPart)
) `when` (isElem >>> hasName "tag")
attrMap "attr" = "attr2"
attrMap a = a
This works for me with your sample document.
这篇关于我如何替换HXT中的节点?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!