java - How to flatten an XML file into a set of xpath expressions? -

-

consider have following example xml file:

<ns1:create xmlns:ns1='http://predic8.com/wsdl/material/articleservice/1/'>    <article xmlns:ns1='http://predic8.com/material/1/'>       <name xmlns:ns1='http://predic8.com/material/1/'>foo</name>       <description xmlns:ns1='http://predic8.com/material/1/'>bar</description>       <price xmlns:ns1='http://predic8.com/common/1/'>          <amount xmlns:ns1='http://predic8.com/common/1/'>00.00</amount>          <currency xmlns:ns1='http://predic8.com/common/1/'>usd</currency>       </price>       <id xmlns:ns1='http://predic8.com/material/1/'>1</id>    </article> </ns1:create>

what best (most efficient) way flatten set of xpath expressions. note also: want ignore namespace , attribute information. (if needed, done pre-processing step).

so want output:

/create/article/name /create/article/description /create/article/price/amount /create/article/price/currency /create/article/id

i’m implementing in java.

edit: ps, might need work in case there no data @ text node, example, following should generate same output above:

<ns1:create xmlns:ns1='http://predic8.com/wsdl/material/articleservice/1/'>   <article xmlns:ns1='http://predic8.com/material/1/'>     <name />     <description />     <price xmlns:ns1='http://predic8.com/common/1/'>       <amount />       <currency xmlns:ns1='http://predic8.com/common/1/'></currency>     </price>     <id xmlns:ns1='http://predic8.com/material/1/'></id>   </article> </ns1:create>

you pretty xslt. looking @ examples, seems want xpath of elements contain text. if that's not case, let me know , can update xslt.

i created new input example show how handles siblings same name. in case, <article>.

xml input

<ns1:create xmlns:ns1='http://predic8.com/wsdl/material/articleservice/1/'>     <article xmlns:ns1='http://predic8.com/material/1/'>         <name xmlns:ns1='http://predic8.com/material/1/'>foo</name>         <description xmlns:ns1='http://predic8.com/material/1/'>bar</description>         <price xmlns:ns1='http://predic8.com/common/1/'>             <amount xmlns:ns1='http://predic8.com/common/1/'>00.00</amount>             <currency xmlns:ns1='http://predic8.com/common/1/'>usd</currency>         </price>         <id xmlns:ns1='http://predic8.com/material/1/'>1</id>     </article>     <article xmlns:ns1='http://predic8.com/material/2/'>         <name xmlns:ns1='http://predic8.com/material/2/'>some name</name>         <description xmlns:ns1='http://predic8.com/material/2/'>some description</description>         <price xmlns:ns1='http://predic8.com/common/2/'>             <amount xmlns:ns1='http://predic8.com/common/2/'>00.01</amount>             <currency xmlns:ns1='http://predic8.com/common/2/'>usd</currency>         </price>         <id xmlns:ns1='http://predic8.com/material/2/'>2</id>     </article> </ns1:create>

xslt 1.0

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform">     <xsl:output method="text"/>     <xsl:strip-space elements="*"/>      <xsl:template match="text()"/>      <xsl:template match="*[text()]">         <xsl:call-template name="genpath"/>         <xsl:apply-templates select="node()|@*"/>     </xsl:template>      <xsl:template name="genpath">         <xsl:param name="prevpath"/>         <xsl:variable name="currpath" select="concat('/',local-name(),'[',         count(preceding-sibling::*[name() = name(current())])+1,']',$prevpath)"/>         <xsl:for-each select="parent::*">             <xsl:call-template name="genpath">                 <xsl:with-param name="prevpath" select="$currpath"/>             </xsl:call-template>         </xsl:for-each>         <xsl:if test="not(parent::*)">             <xsl:value-of select="$currpath"/>             <xsl:text>&#xa;</xsl:text>         </xsl:if>     </xsl:template>  </xsl:stylesheet>

output

/create[1]/article[1]/name[1] /create[1]/article[1]/description[1] /create[1]/article[1]/price[1]/amount[1] /create[1]/article[1]/price[1]/currency[1] /create[1]/article[1]/id[1] /create[1]/article[2]/name[1] /create[1]/article[2]/description[1] /create[1]/article[2]/price[1]/amount[1] /create[1]/article[2]/price[1]/currency[1] /create[1]/article[2]/id[1]

update

for xslt work elements, remove [text()] predicate match="*[text()]". output path every element. if don't want path output elements contain other elements (like create, article, , price) add predicate [not(*)]. here's updated example:

new xml input

<ns1:create xmlns:ns1='http://predic8.com/wsdl/material/articleservice/1/'>     <article xmlns:ns1='http://predic8.com/material/1/'>         <name />         <description />         <price xmlns:ns1='http://predic8.com/common/1/'>             <amount />             <currency xmlns:ns1='http://predic8.com/common/1/'></currency>         </price>         <id xmlns:ns1='http://predic8.com/material/1/'></id>     </article>     <article xmlns:ns1='http://predic8.com/material/2/'>         <name xmlns:ns1='http://predic8.com/material/2/'>some name</name>         <description xmlns:ns1='http://predic8.com/material/2/'>some description</description>         <price xmlns:ns1='http://predic8.com/common/2/'>             <amount xmlns:ns1='http://predic8.com/common/2/'>00.01</amount>             <currency xmlns:ns1='http://predic8.com/common/2/'>usd</currency>         </price>         <id xmlns:ns1='http://predic8.com/material/2/'>2</id>     </article> </ns1:create>

xslt 1.0

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform">     <xsl:output method="text"/>     <xsl:strip-space elements="*"/>      <xsl:template match="text()"/>      <xsl:template match="*[not(*)]">         <xsl:call-template name="genpath"/>         <xsl:apply-templates select="node()"/>     </xsl:template>      <xsl:template name="genpath">         <xsl:param name="prevpath"/>         <xsl:variable name="currpath" select="concat('/',local-name(),'[',             count(preceding-sibling::*[name() = name(current())])+1,']',$prevpath)"/>         <xsl:for-each select="parent::*">             <xsl:call-template name="genpath">                 <xsl:with-param name="prevpath" select="$currpath"/>             </xsl:call-template>         </xsl:for-each>         <xsl:if test="not(parent::*)">             <xsl:value-of select="$currpath"/>             <xsl:text>&#xa;</xsl:text>         </xsl:if>     </xsl:template>  </xsl:stylesheet>

output

/create[1]/article[1]/name[1] /create[1]/article[1]/description[1] /create[1]/article[1]/price[1]/amount[1] /create[1]/article[1]/price[1]/currency[1] /create[1]/article[1]/id[1] /create[1]/article[2]/name[1] /create[1]/article[2]/description[1] /create[1]/article[2]/price[1]/amount[1] /create[1]/article[2]/price[1]/currency[1] /create[1]/article[2]/id[1]

if remove [not(*)] predicate, output looks (a path output every element):

/create[1] /create[1]/article[1] /create[1]/article[1]/name[1] /create[1]/article[1]/description[1] /create[1]/article[1]/price[1] /create[1]/article[1]/price[1]/amount[1] /create[1]/article[1]/price[1]/currency[1] /create[1]/article[1]/id[1] /create[1]/article[2] /create[1]/article[2]/name[1] /create[1]/article[2]/description[1] /create[1]/article[2]/price[1] /create[1]/article[2]/price[1]/amount[1] /create[1]/article[2]/price[1]/currency[1] /create[1]/article[2]/id[1]

here's version of xslt 65% faster:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform">     <xsl:output method="text"/>     <xsl:strip-space elements="*"/>      <xsl:template match="text()"/>      <xsl:template match="*[not(*)]">         <xsl:for-each select="ancestor-or-self::*">             <xsl:value-of select="concat('/',local-name(),'[',count(preceding-sibling::*[local-name()=local-name(current())])+1,']')"/>         </xsl:for-each>         <xsl:text>&#xa;</xsl:text>         <xsl:apply-templates select="node()"/>     </xsl:template>  </xsl:stylesheet>

Comments

Post a Comment

Popular posts from this blog

c# - SVN Error : "svnadmin: E205000: Too many arguments" -

-
i trying reposotries using c# code process svncommand = null; var psi = new processstartinfo("svnadmin"); psi.redirectstandardoutput = true; psi.redirectstandarderror = true; psi.useshellexecute = false; psi.arguments= @"dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump"; using (svncommand = process.start(psi)) { var myoutput = svncommand.standardoutput; var myerror = svncommand.standarderror; debug.write("output :" + environment.newline + environment.newline + myoutput.readtoend() + environment.newline + "error :" + environment.newline + environment.newline + myerror.readtoend()); svncommand.close(); } when use dump command commandline svnadmin dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump it works fine when try ...
Read more

c# - Copy ObservableCollection to another ObservableCollection -

-
how copy observablecollection item observablecollection without reference of first collection? here observablecollection item value changes affecting both collections. code private observablecollection<ratemodel> _allmetalrate = new observablecollection<ratemodel>(); private observablecollection<ratemodel> _metalrateondate = new observablecollection<ratemodel>(); public observablecollection<ratemodel> allmetalrate { { return this._allmetalrate; } set { this._allmetalrate = value; notifypropertychanged("metalrate"); } } public observablecollection<ratemodel> metalrateondate { { return this._metalrateondate; } set { this._metalrateondate = value; notifypropertychanged("metalrateondate"); } } foreach (var item in metalrateondate) allmetalrate.add(item); what causing , how can solve it? you need clone object referenced item before it's a...
Read more

All overlapping substrings matching a java regex -

-
is there api method returns (possibly overlapping) substrings match regular expression? for example, have text string: string t = 04/31 412-555-1235; , , have pattern: pattern p = new pattern("\\d\\d+"); matches strings of 2 or more characters. the matches are: 04, 31, 412, 555, 1235. how overlapping matches? i want code return: 04, 31, 41, 412, 12, 55, 555, 55, 12, 123, 1235, 23, 235, 35. theoretically should possible -- there obvious o(n^2) algorithm enumerates , checks substrings against pattern. edit rather enumerating substrings, safer use region(int start, int end) method in matcher . checking pattern against separate, extracted substring might change result of match (e.g. if there non-capturing group or word boundary check @ start/end of pattern). edit 2 actually, it's unclear whether region() expect zero-width matches. specification vague, , experiments yield disappointing results. for example: string line = "xx90xx"; strin...
Read more