Notes by nogeek
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Created by nogeek on November 03, 2010 20:52:49
Last update: November 23, 2011 08:54:44
My problem is simple: in my XML data, a timestamp is provided as a long integer (number of milliseconds since the "the epoch"). When I do XSLT, I want to display it as a readable string, such as "Mon Nov 01 18:08:48 CDT 2010". After hours of struggle, I found: It's not so easy to get the job done with JDK 1.6 There are tons of garbage on the web in this space (suggestions, code snippets that simply don't work) Simple Xalan extension functions was the only resource that's somewhat informative. Even there some of the examples don't work. Below is a list of what worked and what didn't. This works:
<xsl:stylesheet version="1.0" xmlns:xsl="h... This does not (providing long value to Date constructor): <xsl:stylesheet version="1.0" xmlns:xsl="h......
Created by nogeek on April 07, 2011 21:30:54
Last update: April 07, 2011 21:30:54
This is the opposite of parsing. You can use javax.xml.transform.Transformer to output a DOM tree to a file.
import java.io.*;
import javax.xml.parsers.Docu...
Created by nogeek on April 07, 2011 21:07:55
Last update: April 07, 2011 21:07:55
You can use the javax.xml.transform.Transformer class to "transform" an XML stream (string in this case) to a DOM tree - effectively parsing the XML string.
import java.io.*;
import javax.xml.transform.Tr...
Created by nogeek on April 07, 2011 20:54:17
Last update: April 07, 2011 20:54:17
Use javax.xml.parsers.DocumentBuilder to parse xml. DocumentBuilder.parse() takes:
java.io.File
org.xml.sax.InputSource
java.io.InputStream
java.lang.String as a URI to an XML document
Example code:
import java.io.*;
import javax.xml.parsers.Docu...
Created by nogeek on February 08, 2011 13:46:18
Last update: February 08, 2011 13:46:18
Simple Java code that does XSLT on an XML file. The transform results go to STDOUT.
import java.io.*;
import javax.xml.parsers....
Created by nogeek on November 11, 2010 00:26:08
Last update: November 11, 2010 00:29:43
This one is even more weird: it worked on Windows but failed on Linux, using default tools JDK1.6.0_20 on both. The exception thrown was:
java.lang.RuntimeException: Invalid conversion fro...
And the stack trace:
java.lang.RuntimeException: Invalid conversion fro...
This was the XSL used:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xs...
The problem was , DateUtil.java had two getDate methods, one taking long parameter, the other taking a String parameter. And Java's XSLT get confused about which one to use:
import java.util.Date;
import java.text.SimpleD...
Created by nogeek on November 04, 2010 20:00:15
Last update: November 05, 2010 14:38:43
Following are some bugs in the Xalan jar shipped with JBoss 5.1.0 GA and JBoss 6.0. The Xalan jar file is located in jboss-5.1.0.GA/lib/endorsed ( %JBOSS_HOME%/common/lib for JBoss 6.0).
Test xml:
<?xml version="1.0" encoding="ISO-8859-1"?>
...
Test xsl:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xs...
XSLT Java code:
import org.w3c.dom.*;
import javax.xml.parsers....
DateUtil.java
import java.util.Date;
public class DateUti...
XSLT output:
Transformer Factory class: class org.apache.xalan....
Apparently, the output is wrong. The string "A test event" should not have been displayed.
Created by nogeek on November 04, 2010 20:24:32
Last update: November 04, 2010 20:24:55
XSLT by default writes namespace declarations in the output. Most of the time it's spurious, sometimes outright wrong.
Take this XML:
<?xml version="1.0" encoding="ISO-8859-1"?>
<ev...
And this XSL:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xs...
where DateUtil.java is:
import java.util.Date;
public class DateUti...
The output is (with JDK1.6):
Title: <br xmlns:java="http://xml.apache.org/x...
The namespace declaration went to the <br> element, not the timestamp where it belongs.
To remove the namespace info, add exclude-result-prefixes to the XSL:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xs...
Created by nogeek on August 05, 2010 15:13:24
Last update: August 05, 2010 15:13:24
Read from stdio and print out rot13:
import java.io.BufferedReader;
import java.io.I...
The ROT13 translated Fourth Amendment reads:
Gur evtug bs gur crbcyr gb or frpher va gurve crefbaf, ubhfrf, cncref, naq rssrpgf, ntnvafg haernfbanoyr frnepurf naq frvmherf, funyy abg or ivbyngrq, naq ab Jneenagf funyy vffhr, ohg hcba cebonoyr pnhfr, fhccbegrq ol Bngu be nssvezngvba, naq cnegvphyneyl qrfpevovat gur cynpr gb or frnepurq, naq gur crefbaf be guvatf gb or frvmrq.
