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Chapter 1: Getting Started with Stylus Studio®

Chapter 2: Editing and Querying XML

Chapter 3: Converting Non-XML Files to XML

Chapter 4: Converting EDI to XML

Chapter 5: Working with XSLT

Chapter 6: Creating XSLT Using the XSLT Mapper

Chapter 7: Debugging Stylesheets

Chapter 8: Defining XML Schemas

Chapter 9: Defining Document Type Definitions

Chapter 10: Writing XPath Expressions

Chapter 11: Working with XQuery in Stylus Studio

Chapter 12: Composing Web Service Calls

Chapter 13: Working with WSDL Documents

Chapter 14: Building XML Pipelines

Chapter 15: Publishing XML Data

Chapter 16: Integrating with Third-Party File Systems

Chapter 17: Extending Stylus Studio

Chapter 18: The Stylus Studio Java API

Chapter 19: Stylus Studio GUI Reference

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Declaring an XSLT Extension Function

Extension functions must have one of the following signatures:

public Object FxnName() 
public Object FxnName(Type1 var1, Type2 var2,...) 
public static Object FxnName() 
public static Object FxnName(Type1 var1, Type2 var2,...)

A class that contains an extension function might look like the following:

import org.w3c.dom.*; import java.lang.Double; public class NumberUtils { public Object Average(NodeList nl) { double nSum = 0; for (int i = nl.getLength() - 1; i >= 0; i--) { nSum += Double.valueOf(nl.item(i). getNodeValue()).doubleValue(); } return new Double(nSum / nl.getLength()); } }

import org.w3c.dom.*; 
import java.lang.Double; 
public class NumberUtils 
{  
  public Object Average(NodeList nl) 
  { 
    double nSum = 0; 
  for (int i = nl.getLength() - 1; i >= 0; i--) 
   { 
    nSum +=  
    Double.valueOf(nl.item(i). 
    getNodeValue()).doubleValue(); 
   } 
  return new Double(nSum / nl.getLength()); 
  } 
}

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