XSLT transform

[dileep keely]

Please suggest.
My XML data :
<XML>
<LogLevel>info</LogLevel>
<Content>
<Msg>
<AccountNo>6666</AccountNo>
<ApplName>Testing</ApplName>
</Msg>
</Content>
<data><AccountNo>555555</AccountNo></data>
<AccountNo>444444444</AccountNo>
<Date>20140909</Date>
</XML>


I want to mask all the AccountNo to the output as below.

<XML>
<LogLevel>info</LogLevel>
<Content>
<Msg>
<AccountNo>******66</AccountNo>
<ApplName>Testing</ApplName>
</Msg>
</Content>
<data><AccountNo>******5555</AccountNo></data>
<AccountNo>******444</AccountNo>
<Date>20140909</Date>
</XML>



Java code :

public class LsorRequestEventHandler {
	public static void main(String[] args) throws TransformerException {
	    String stylesheetPathname = "C:/Users/ws2/src/main/resources/xslt/testXSLT.xsl";
	    String inputPathname = "C:/Users/ws2/src/main/resources/xslt//test.xml";
	    String outputPathname ="test123.xml";
	    StreamResult result=new StreamResult(new StringWriter());
	    TransformerFactory factory = TransformerFactory.newInstance();
	    Source stylesheetSource = new StreamSource(stylesheetPathname);
	    Transformer transformer = factory.newTransformer(stylesheetSource);
	    Source inputSource = new StreamSource(inputPathname);
	    StreamResult outputResult = new StreamResult(new StringWriter());
	    transformer.transform(inputSource, outputResult);
	    System.out.println(outputResult.getWriter().toString());
	  }

}

XSLT : I am not good at XSLT i am learning it.
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>

<!-- identity transform -->
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>

<xsl:template match="AccountNo">
<xsl:variable name="acct-num" select="substring-before(substring-after(.,'AccountNo'), '/AccountNo')" />
<xsl:value-of select="concat('************', substring($acct-num, string-length($acct-num) - 2))" />

</xsl:template>

</xsl:stylesheet>

Could you please let me know what should be the XSLT..

I am getting wrong output :

<?xml version="1.0" encoding="UTF-8"?>
<XML>
<LogLevel>info</LogLevel>
<Content>
<Msg>************<ApplName>Testing</ApplName>
</Msg>
</Content>
<data>************</data>************<Date>20140909</Date>
</XML>

[g tsuji]

The main problem is that the meaning of the dot or the context of the match for a template is misunderstood. That reflects fully in the construction of the variable $acct-num. The dot in a string function would be the text context of the node in context. There isn't any trace of 'AccountNo', the tag name, anymore. The AccountNo element, on the other hand, has to be re-constructed through xsl:copy.

This is how it should look like, with some improvements like in case where the account number being of length less than or equal to 2 (you then don't want to show anything, do you? because it would reveal too much). This is how you mask and then produce a fixed length output. I hope that gives you an instructive implementation on multiple aspect --- you've to discover them yourself.
<xsl:template match="AccountNo"> <xsl:variable name="acct-num"> <xsl:choose> <xsl:when test="string-length(.) > 2"> <xsl:value-of select="substring(.,string-length(.)-1)" /> </xsl:when> <xsl:otherwise> <xsl:value-of select="'**'" /> </xsl:otherwise> </xsl:choose> </xsl:variable> <xsl:copy> <xsl:value-of select="concat('************', $acct-num)" /> </xsl:copy> </xsl:template>