dbertoni 00/05/01 07:57:49
Added: c/samples/ExternalFunction ExternalFunction.cpp
ExternalFunction.dsp foo.xml foo.xsl
Log:
Initial revision.
Revision Changes Path
1.1 xml-xalan/c/samples/ExternalFunction/ExternalFunction.cpp
Index: ExternalFunction.cpp
===================================================================
#include <cmath>
#include <ctime>
#include <iostream>
#include <fstream>
#include <util/PlatformUtils.hpp>
#include <PlatformSupport/DOMStringHelper.hpp>
#include <DOMSupport/DOMSupportDefault.hpp>
#include <XPath/XObjectFactoryDefault.hpp>
#include <XPath/XPath.hpp>
#include <XPath/XPathSupportDefault.hpp>
#include <XPath/XPathFactoryDefault.hpp>
#include <XSLT/StylesheetConstructionContextDefault.hpp>
#include <XSLT/StylesheetExecutionContextDefault.hpp>
#include <XSLT/XSLTEngineImpl.hpp>
#include <XSLT/XSLTInputSource.hpp>
#include <XSLT/XSLTProcessorEnvSupportDefault.hpp>
#include <XSLT/XSLTResultTarget.hpp>
#include <XercesParserLiaison/XercesParserLiaison.hpp>
#include <XercesPlatformSupport/TextFileOutputStream.hpp>
#include <XercesPlatformSupport/XercesDOMPrintWriter.hpp>
// This class defines a function that will return the square root
// of its argument.
class FunctionSquareRoot : public Function
{
public:
/**
* Execute an XPath function object. The function must return a valid
* object.
*
* @param executionContext executing context
* @param context current context node
* @param opPos current op position
* @param args vector of pointers to XObject arguments
* @return pointer to the result XObject
*/
virtual XObject*
execute(
XPathExecutionContext&
executionContext,
XalanNode*
context,
int
opPos,
const XObjectArgVectorType& args)
{
if (args.size() != 1)
{
executionContext.error("The square-root() function
takes one argument!", context);
}
assert(args[0] != 0);
return
executionContext.getXObjectFactory().createNumber(sqrt(args[0]->num()));
}
/**
* Create a copy of the function object.
*
* @return pointer to the new object
*/
#if defined(XALAN_NO_COVARIANT_RETURN_TYPE)
virtual Function*
#else
virtual FunctionSquareRoot*
#endif
clone() const
{
return new FunctionSquareRoot(*this);
}
private:
// Not implemented...
FunctionSquareRoot&
operator=(const FunctionSquareRoot&);
bool
operator==(const FunctionSquareRoot&) const;
};
// This class defines a function that will return the cube
// of its argument.
class FunctionCube : public Function
{
public:
/**
* Execute an XPath function object. The function must return a valid
* object.
*
* @param executionContext executing context
* @param context current context node
* @param opPos current op position
* @param args vector of pointers to XObject arguments
* @return pointer to the result XObject
*/
virtual XObject*
execute(
XPathExecutionContext&
executionContext,
XalanNode*
context,
int
opPos,
const XObjectArgVectorType& args)
{
if (args.size() != 1)
{
executionContext.error("The cube() function takes one
argument!", context);
}
assert(args[0] != 0);
return
executionContext.getXObjectFactory().createNumber(pow(args[0]->num(), 3));
}
/**
* Create a copy of the function object.
*
* @return pointer to the new object
*/
#if defined(XALAN_NO_COVARIANT_RETURN_TYPE)
virtual Function*
#else
virtual FunctionCube*
#endif
clone() const
{
return new FunctionCube(*this);
}
private:
// Not implemented...
FunctionCube&
operator=(const FunctionCube&);
bool
operator==(const FunctionCube&) const;
};
// This class defines a function that runs the C function
// asctime() using the current system time.
class FunctionAsctime : public Function
{
public:
/**
* Execute an XPath function object. The function must return a valid
* object.
*
* @param executionContext executing context
* @param context current context node
* @param opPos current op position
* @param args vector of pointers to XObject arguments
* @return pointer to the result XObject
*/
virtual XObject*
execute(
XPathExecutionContext&
executionContext,
XalanNode*
context,
int
opPos,
const XObjectArgVectorType& args)
{
if (args.size() != 0)
{
executionContext.error("The asctime() function takes no
arguments!", context);
}
time_t theTime;
time(&theTime);
char* const theTimeString = asctime(localtime(&theTime));
// The resulting string has a newline character at the end,
// so get rid of it.
theTimeString[strlen(theTimeString) - 1] = '\0';
return
executionContext.getXObjectFactory().createString(XalanDOMString(theTimeString));
}
/**
* Create a copy of the function object.
*
* @return pointer to the new object
*/
#if defined(XALAN_NO_COVARIANT_RETURN_TYPE)
virtual Function*
#else
virtual FunctionAsctime*
#endif
clone() const
{
return new FunctionAsctime(*this);
}
private:
// Not implemented...
FunctionAsctime&
operator=(const FunctionAsctime&);
bool
operator==(const FunctionAsctime&) const;
};
int
main(
int argc,
const char* /* argv */[])
{
#if !defined(XALAN_NO_NAMESPACES)
using std::cerr;
using std::endl;
using std::ofstream;
#endif
if (argc != 1)
{
cerr << "Usage: ExternalFunction"
<< endl
<< endl;
}
else
{
try
{
// Call the static initializers...
XMLPlatformUtils::Initialize();
XSLTEngineImpl::Initialize();
// Create the support objects that are necessary for
running the processor...
DOMSupportDefault
theDOMSupport;
XercesParserLiaison
theParserLiaison(theDOMSupport);
XPathSupportDefault
theXPathSupport(theDOMSupport);
XSLTProcessorEnvSupportDefault
theXSLTProcessorEnvSupport;
XObjectFactoryDefault
theXObjectFactory(theXSLTProcessorEnvSupport, theXPathSupport);
XPathFactoryDefault
theXPathFactory;
// Create a processor...
XSLTEngineImpl theProcessor(
theParserLiaison,
theXPathSupport,
theXSLTProcessorEnvSupport,
theXObjectFactory,
theXPathFactory);
// Connect the processor to the support object...
theXSLTProcessorEnvSupport.setProcessor(&theProcessor);
// Use the parser liaison as the formatter...
theProcessor.setFormatter(&theParserLiaison);
// Create a stylesheet construction context, and a
stylesheet
// execution context...
StylesheetConstructionContextDefault
theConstructionContext(
theProcessor,
theXSLTProcessorEnvSupport,
theXObjectFactory,
theXPathFactory);
StylesheetExecutionContextDefault
theExecutionContext(
theProcessor,
theXSLTProcessorEnvSupport,
theXPathSupport,
theXObjectFactory);
// Our input files...
// WARNING!!! You may need to modify these absolute
paths depending on where
// you've put the Xalan sources.
const DOMString theXMLFileName("foo.xml");
const DOMString theXSLFileName("foo.xsl");
// Our input sources...
XSLTInputSource
theInputSource(c_wstr(theXMLFileName));
XSLTInputSource
theStylesheetSource(c_wstr(theXSLFileName));
// Our output target...
TextFileOutputStream theOutputStream("foo.out");
XercesDOMPrintWriter
theResultWriter(theOutputStream);
XSLTResultTarget
theResultTarget(&theResultWriter);
// Install the function directly into the XPath
// function table. We don't recommend doing this,
// but you can if you want to be evil! ;-) Since
// the function is in the XPath table, the XPath
// parser will treat it like any other XPath
// function. Therefore, it cannot have a namespace
// prefix. It will also be available to every
// processor in the executable's process, since there
// is one static XPath function table.
XPath::installFunction(
"asctime",
FunctionAsctime());
// The namespace for our functions...
const XalanDOMString
theNamespace("http://ExternalFunction.xalan-c++.xml.apache.org";);
// Install the function in the global space. All
// instances will know about the function, so all
// processors which use an instance of this the
// class XPathEnvSupportDefault will be able to
// use the function.
XSLTProcessorEnvSupportDefault::installExternalFunctionGlobal(
theNamespace,
"square-root",
FunctionSquareRoot());
// Install the function in the local space. It will
only
// be installed in this instance, so no other instances
// will know about the function...
theXSLTProcessorEnvSupport.installExternalFunctionLocal(
theNamespace,
"cube",
FunctionCube());
theProcessor.process(
theInputSource,
&theStylesheetSource,
theResultTarget,
theConstructionContext,
theExecutionContext);
}
catch(...)
{
cerr << "Exception caught!!!"
<< endl
<< endl;
}
}
return 0;
}
1.1 xml-xalan/c/samples/ExternalFunction/ExternalFunction.dsp
Index: ExternalFunction.dsp
===================================================================
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1.1 xml-xalan/c/samples/ExternalFunction/foo.xml
Index: foo.xml
===================================================================
<?xml version="1.0"?>
<doc>Hello</doc>
1.1 xml-xalan/c/samples/ExternalFunction/foo.xsl
Index: foo.xsl
===================================================================
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0"
xmlns:external="http://ExternalFunction.xalan-c++.xml.apache.org";>
<xsl:template match="doc">
<out><xsl:value-of select="external:cube(external:square-root(9))"/></out>
<xsl:text>
</xsl:text>
<out><xsl:value-of select="asctime()"/></out>
</xsl:template>
</xsl:stylesheet>
