Retrieving hashmap values in XSLT
I am performing XSLT transformation using a java program. Below is the block of code that is used for the conversion. Here I am creating a hashmap and setting the value to be retrieved in XSLT.
TransformerFactory factory = TransformerFactory.newInstance();
StreamSource xslStream = new StreamSource(inputXSL);
Transformer transformer = factory.newTransformer(xslStream);
Map<String,String> mapData = new HashMap<String,String>();
mapData.put("103", "188 E 6th Street");
transformer.setParameter("mapData", mapData);
Shown below is the xslt (inputXSL) code that performs the conversion.
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:map="xalan://java.util.Map"
extension-element-prefixes="map">
<xsl:param name="mapData"/>
<xsl:template match="/class">
<html>
<body>
<h3>Student Details</h3>
<table border="1">
<tr bgcolor="#E6E6FA">
<th>Roll Number</th>
<th>First Name</th>
<th>Last Name</th>
<th>Nick Name</th>
<th>Marks</th>
<th>Address</th>
</tr>
<xsl:for-each select="student">
<tr>
<xsl:variable name="rollNumber" select="./@rollno"/>
<xsl:variable name="addressData" select="map:get($mapData,$rollNumber)"/>
<td>
<xsl:value-of select="./@rollno" />
</td>
<td>
<xsl:value-of select="firstname" />
</td>
<td>
<xsl:value-of select="lastname" />
</td>
<td>
<xsl:value-of select="nickname" />
</td>
<td>
<xsl:value-of select="marks" />
</td>
<td>
<xsl:value-of select="$addressData" />
</td>
</tr>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
In the above xslt program, I can get the value for the addressData variable if I pass in a hardcoded key like '101' (refer to students.xml). But if I iterate over the array and then pass the number as a key, the value in the addressData variable is empty.
I'm not sure why the map.:get method will take a hardcoded value but not a parameter. I guess I'm missing something.
Following is the xml data that is passed to the xslt.
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="ParseResponse.xsl"?>
<class>
<student rollno="101">
<firstname>PPP</firstname>
<lastname>LLL</lastname>
<nickname>JJJ</nickname>
<marks>85</marks>
</student>
<student rollno="102">
<firstname>AAA</firstname>
<lastname>CCC</lastname>
<nickname>DDD</nickname>
<marks>95</marks>
</student>
<student rollno="103">
<firstname>KKK</firstname>
<lastname>LLL</lastname>
<nickname>WWW</nickname>
<marks>90</marks>
</student>
</class>
Can someone explain why the map: get method will accept hard coded input but not a variable?
source to share
As you determined - HashMap<String,String>()
its keys and values should be String
. As long as you get $rollNumber
as a type variable
when retrieving data.
<xsl:variable name="addressData" select="map:get($mapData,$rollNumber)"/>
before transferring, you must transfer it to String
from variable
.
<xsl:variable name="addressData" select="map:get($mapData,(String)$rollNumber)"/>