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What it does: XalanTransform uses the XalanTransformer class and the associated C++ API to apply an XSL stylesheet file to an XML document file and write
the transformation output to either an output file or to a stream. XalanTransform takes command-line
arguments for the XML document to be transformed, the XSL stylesheet to apply, and an optional output file argument. If you omit
the third argument, XalanTransform writes the transformation output to a stream that is sent to standard out (the console).
You can run XalanTransform from the XalanTransform subdirectory with
XalanTransform foo.xml foo.xsl foo.out
Omit the third argument to write the transformation result to the console. See also: Using the XalanTransformer class..
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What it does: The SimpleTransform class uses the foo.xsl stylesheet to transform foo.xml, and writes the
output to foo.out.
You can run it from the SimpleTransform subdirectory with
SimpleTransform
See also: Basic procedures for performing XSL
transformations.
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What it does: The StreamTransform class processes character input streams containing a stylesheet and an XML document, and
writes the transformation output to a character output stream. This sample illustrates the process for working with stylesheets and documents that you assemble in memory.
You can run it from the SimpleTransform subdirectory with
StreamTransform
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What it does: Set a stylesheet parameter that the stylesheet uses during the transformation.
You can run it from the UseStylesheetParam subdirectory with
UseStylesheetParam key expression
where key is the parameter key (or name) and expression is a string expression enclosed
in single quotes.
The example uses a stylesheet (foo.xsl) with a parameter named param1. The stylesheet accepts any string
expression. Enclose the string expression in single quotes (so it is interpreted as an expression); if it
includes more than a single word, enclose the resulting string in double quotes so the executable interprets it
as a single argument. For example:
UseStylesheetParam param1 "'hello out there'"
See also: Setting stylesheet parameters.
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What it does: Return transformation output in blocks to a callback function, which writes the output to a file.
This sample illustrates the use of a callback function to incrementally process a transformation result, that is to begin
working with the transformation result before the transformation has beeen completed. See Processing output incrementally.
You can run it from the XalanTransformerCallback subdirectory with
XalanTransformerCallback foo.xml foo.xsl [foo.out]
 | If you omit the third argument, the transformation result is written to the console. |
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What it does: Trace events during a transformation; the transformation uses birds.xsl to transform birds.xml and writes the
output to birds.out.
You can run it from the TraceListen subdirectory with
TraceListen traceFlags
where traceFlags is one or more of the following:
-tt (Trace the templates as they are being called)
-tg (Trace each result tree generation event)
-ts (Trace each selection event)
-ttc (Trace the template children as they are being processed)
These flags are also available in the command-line utility (TestXSLT).
The core of this example is the following fragment:
 | | | | // Set up a diagnostic writer to be used by the TraceListener...
XalanStdOutputStream theStdErr(cerr);
XalanOutputStreamPrintWriter diagnosticsWriter(theStdErr);
// Make sure that error reporting, which includes any TraceListener
// output does not throw exceptions when transcoding, since that could
// result in an exception being thrown while another exception is active.
// In particular, characters that the TraceListener writes might not be
// representable in the local code page.
theStdErr.setThrowTranscodeException(false);
// Set up the TraceListener...
// traceTemplates, traceTemplateChildren, traceGenerationEvent,
// and TraceSelectionEvent are booleans set by the command line.
TraceListenerDefault theTraceListener(
diagnosticsWriter,
traceTemplates,
traceTemplateChildren,
traceGenerationEvent,
traceSelectionEvent);
// Add the TraceListener to the XSLT processor...
theProcessor.setTraceSelects(traceSelectionEvent);
theProcessor.addTraceListener(&theTraceListener);
// Perform the transformation
.... | | | | |
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What it does: Use a compiled stylesheet to perform a series of transformations.
You can run it from the CompileStylesheet subdirectory with
CompileStylesheet
See also: Compiling stylesheets.
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What it does: Use a DocumentBuilder to programmatically construct an XML document, apply the foo.xsl stylesheet to
this document, and write the ouput to foo.out.
You can run it from the DocumentBuilder subdirectory with
DocumentBuilder
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| For a more streamlined sample that uses the XPathEvaluator interface, see
SimpleXPathAPI. |
This sample uses an executable (TestDriver in Windows, XPathWrapper in Linux and AIX), and two classes: XPathWrapper and
XPathWrapperImp.
What it does: The executable passes XPathWrapper an XML file name, a context node location path, and an XPath
expression. XPathWrapper in turn passes these arguments to the XPathWrapperImpl evaluate() method, which executes the
XPath expression from specified context node in the XML document and returns the nodes it finds (if any).
| You can use this sample as an aid when you want to find out what a given XPath expression returns from a
given context node in an XML file. |
Run this sample from the XPathWrapper subdirectory with the same command line arguments described for SimpleXPathAPI. Under Windows, the executable is TestDriver; under UNIX, the
executable is XPathWrapper.
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What it does: Use the XPathEvaluator interface to evaluate an XPath expression from the specified context node of
an XML file and display the nodeset returned by the expression.
| You can use this sample as an aid when you want to find out what a given XPath expression returns from a
given context node in an XML file. |
Run this sample from the SimpleXPathAPI subdirectory with
SimpleXPathAPI XMLFile ContextNode XPathExpression
where XMLFile is an XML source file, ContextNode is the location path to the context
node, and XPathExpression is an XPath expression to apply to that context node. The XPathWrapper
subdirectory contains an XML file named xml.foo (part of it appears below).
| | | | <?xml version="1.0"?>
<doc>
<name first="David" last="Marston"/>
<name first="David" last="Bertoni"/>
...
<name first="Paul" last="Dick"/>
</doc> | | | | |
You can try command lines like
SimpleXPathAPI foo.xml /doc name/@last
and
SimpleXPathAPI foo.xml / '//name[position()="4"]/@first'
| If a SimpleXPathAPI argument includes characters (such as *) that the shell interprets incorrectly, enclose the argument
in double quotes. |
See also: Working with XPath expressions.
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What it does: implement, install, and illustrate the usage of three extension functions. The functions return a
square root, a cube, and a string with the current date and time. The sample stylesheet (foo.xsl) gets the area
of a cube and units of measurement from an XML document (foo.xml), computes the length of each side
of a cube and the volume of the cube, and enters the date and time of the transformation. The output appears in
foo.out.
Run this sample from the ExternalFunctions subdirectory with
ExternalFunctions
See also: Extension Functions.
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| This sample must be built with the Apache Web server, and the Xalan-C++ distribution files do not include a binary
for ApacheModuleXSLT. Assuming you have installed the Apache server on your platform, you can use Visual C++ on Windows to
build ApacheModuleXSLT.dll, or the makefile on UNIX to build xslt_module (with the appropriate library suffix). |
What it does: runs as an Apache module on an Apache Web server; performs transformations and returns the output to a Web
browser. You configure Apache to respond to a given URL request for an output file (html or txt file in the configuration below)
by applying an xsl stylesheet file to an xml document file (both with the specified name in a given location) and returning
the transformation output to the client.
This sample also illustrates use of the XalanTransformer class and the C API defined in src/XalanTransformer/XalanCAPI.h. It returns
transformation output in blocks to a callback function, which enables the browser to start displaying the result before the transformation
has been completed.
| You may need to adjust the Visual C++ or makefile settings to locate the required Apache header files. As shipped, the Visual C++
project file looks in \Apache Group\Apache\src\include, and the UNIX makefile looks in usr/lib. |
To build the Apache module, follow the instructions in Steps for doing a Windows
build or Steps for doing a UNIX build. For UNIX platforms, you do the build with
make ApacheModuleXSLT.
| | | | Setting up and using ApacheModuleXSLT | | | | |
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To use ApacheModuleXSLT, do the following:
- (UNIX only) Be sure the Xalan and Xerces libraries are on your library path (you can accomplish this by copying them to
/usr/lib; see Setting up the path/library path), and copy the Apache module to
/usr/lib/apache.
- Add LoadModule and (UNIX only) AddModule entries to the Apache configuration file: httpd.conf.
Windows: LoadModule xslt_module xml-xalan\c\Build\Win32\VC6\Release\ApacheModuleXSLT.dll
UNIX: AddModule mod_xslt.c
and
LoadModule xslt_module /usr/lib/apache/mod_xslt.xx
where xx is the appropriate library suffix for the UNIX platform ("so" or "a").
- Add a <Location> entry to httpd.conf that indicates where xml/xsl file pairs are to be found, and what target file extensions
to recognize. We suggest the following:
<Location /xslt>
AddHandler mod_xslt .html
AddHandler mod_xslt .txt
</Location>
This <Location> element instructs the module to respond to requests for xxx.html and xxx.txt files in the
in the xslt subdirectory (under the document root; see next item) by applying the xxx.xsl stylesheet to xxx.xml
(both in that directory) and returning the transformation result to the browser.
For example, a request for foo.html instructs the module to apply foo.xsl to foo.xml and return the result.
Note: It is up to the stylesheet to apply the appropriate xsl:output method to the output. Whether the user specifies html or txt is, of
itself, immaterial.
- Put xml/xsl file pairs in the <Location> subdirectory (xslt in the example)) under the document root directory specified in httpd.conf by the
DocumentRoot and <Directory> settings. Alternatively, you can modify these settings to point to xml-xalan/c/samples/ApacheModuleXSLT,
which includes an xslt subdirectory with xml/xsl file pairs (foo.xml/xsl, apachemod.xml/xsl).
- Start the Apache server.
- From a Web browser, call the module with a URL as follows:
http://serverName/xslt/xxx.html
where serverName is the Apache server (such as www.myServer.com) and xxx is the name of an xml/xsl pair of files
(such as foo.xml and foo.xsl) in the xslt subdirectory under the DocumentRoot directory.
For example,
http://www.myServer.com/xslt/apachemod.html
instructs ApacheModuleXSLT to apply the apachemod.xsl stylesheet to the apachemod.xml XML document (both files in the xslt directory under the
Apache DocumentRoot directory) and return the transformation result to the browser.
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