One xml, multiple xsl, multiple xslt, one output

Question

Hi,
I have one xml file, 3 xsl files, and want to output (append) to a text file.
I can only get a result when I run one xsl against the xml, if I try adding new xsl and new Transform instances, I get a whole host of errors. The bits in bold are what i'm adding to run a second transformation against original xml file, with a new stylesheet. Where am I going wrong?
Here's my code:
// create the XML content input source:
String xmlInputFile = getFilepathdoc();
Source xmlSource = new StreamSource(new FileInputStream(xmlInputFile));
// create the XSLT Stylesheet input source
String xsltInputFile1 = DefaultValues.xsl1;
Source xsltSource1 = new StreamSource(new
FileInputStream(xsltInputFile1));
String xsltInputFile3 = DefaultValues.xsl3;
Source xsltSource3 = new StreamSource(new
FileInputStream(xsltInputFile3));
// create the result target of the transformation
// appends file
String xmlOutputFile = DefaultValues.text1;
Result transResult = new StreamResult(new FileOutputStream(xmlOutputFile,true));
// create the transformerfactory & transformer instance
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer(xsltSource1);
TransformerFactory tf3 = TransformerFactory.newInstance();
Transformer t3 = tf3.newTransformer(xsltSource3);
// execute transformation & fill result target object
t.transform(xmlSource, transResult);
t3.transform(xmlSource, transResult);
Thanks

Answer 1

The XSL stylesheets (xsltSource1 and xsltSource3) pose no problem at all. It is only the XML document to be transformed (xmlSource) that can cause problems if you supply its content in a stream-based object like an InputStream or a Reader. To clarify what I mean, here are a few examples.
1. Multiple XSL transformation using multiple instances of stream-based source objects
a) Instantiation with an InputStream:...
Source xmlSource1 = new StreamSource(new FileInputStream(xmlInputFile));
Source xmlSource3 = new StreamSource(new FileInputStream(xmlInputFile));
t.transform(xmlSource1, transResult);
t3.transform(xmlSource3, transResult);
...b) Instantiation with a Reader:...
Source xmlSource1 = new StreamSource(new StringReader(<string content of xmlInputFile>));
Source xmlSource3 = new StreamSource(new StringReader(<string content of xmlInputFile>));
t.transform(xmlSource1, transResult);
t3.transform(xmlSource3, transResult);
...Note that if you did the transformation multiple times with either xmlSource1 or xmlSource3, you would get an error. That's why I used different sources.
2. Multiple XSL transformation using a single instance of a non-stream-based source object
a) Instantiation with a File:...
Source xmlSource = new StreamSource(new File("C:/xmlInputFile.xml"));
t.transform(xmlSource, transResult);
t3.transform(xmlSource, transResult);
...b) Instantiation with a String that conforms to a URL:...
Source xmlSource = new StreamSource("file:C:/xmlInputFile.xml");
t.transform(xmlSource, transResult);
t3.transform(xmlSource, transResult);
...