Hi James,
On Tue, Aug 16, 2022 at 11:20 PM James Allen <jamesalle...@gmail.com> wrote:
> I tried to remove xalan jar from classpath and use the basic internal jdk
> version with java 8 or java 11 but found our use of an internal
> java.util.Hashtable to store and retrieve values stopped working Example
> (xmlns:myhash="xalan://java.util.Hashtable").
> xsl:variable MYHASH to declare one with myhash:new()
> then myhash:put and myhash:get etc caused no errors but value put in could
> not be retrieved later with get.
Following is an example, I've tried today, to use java Hashtable via
an XSLT stylesheet processed by Xalan.
XML input document:
<map>
<entry>
<key>1</key>
<value>a</value>
</entry>
<entry>
<key>2</key>
<value>b</value>
</entry>
<entry>
<key>3</key>
<value>c</value>
</entry>
<entry>
<key>4</key>
<value>d</value>
</entry>
</map>
The Java extension utility, that I use to store above XML map data,
within a JVM Hashtable:
import java.util.Hashtable;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
public class HashtableUtil {
private static Hashtable hashTable = new Hashtable();
public static void populateHashTable(NodeList mapEntries) {
for (int idx = 0; idx < mapEntries.getLength(); idx++) {
String key = findKeyFromXmlMapItem(mapEntries.item(idx));
String value = findValueFromXmlMapItem(mapEntries.item(idx));
hashTable.put(key, value);
}
}
public static String getValueFromMap(String key) {
return (String)hashTable.get(key);
}
private static String findKeyFromXmlMapItem(Node node) {
String key = "";
NodeList nodeList = node.getChildNodes();
for (int idx = 0; idx < nodeList.getLength(); idx++) {
Node nodeChild = nodeList.item(idx);
if (nodeChild.getNodeType() == Node.ELEMENT_NODE &&
"key".equals(nodeChild.getNodeName())) {
key = (nodeChild.getFirstChild()).getNodeValue();
break;
}
}
return key;
}
private static String findValueFromXmlMapItem(Node node) {
String value = "";
NodeList nodeList = node.getChildNodes();
for (int idx = 0; idx < nodeList.getLength(); idx++) {
Node nodeChild = nodeList.item(idx);
if (nodeChild.getNodeType() == Node.ELEMENT_NODE &&
"value".equals(nodeChild.getNodeName())) {
value = (nodeChild.getFirstChild()).getNodeValue();
break;
}
}
return value;
}
}
The XSLT stylesheet, that I've used to tie both of above things (i.e,
using the above mentioned XML map data, and the Java extension
utility):
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:java="http://xml.apache.org/xalan/java";
exclude-result-prefixes="java"
version="1.0">
<xsl:output method="text"/>
<xsl:template match="/">
<xsl:variable name="polulateHashtableAction"
select="java:HashtableUtil.populateHashTable(map/entry)"/>
<xsl:for-each select="map/entry">
<xsl:value-of select="key"/> => <xsl:value-of
select="java:HashtableUtil.getValueFromMap(key)"/><xsl:text>
</xsl:text>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
The above XSLT stylesheet when run, produces following output:
1 => a
2 => b
3 => c
4 => d
--
Regards,
Mukul Gandhi
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