Saxon

Bug #5877

Updated by Michael Kay about 1 year ago

**InputXml:**  

 ``` 
 <?xml version=\"1.0\"?> 
 <Guids> 
	 <serialNum>1</serialNum> 
 </Guids> 
 <Guids> 
	 <serialNum>2</serialNum> 
 </Guids> 			
 ``` 

 			

 **Case1:Using functions inside xslt** 

 ``` 
 <?xml version="1.0" encoding="UTF-8"?> 
 <xsl:stylesheet 
	 xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
	 xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:func="http://www.xsltfunctions.com" 
	 xmlns:helper="com.test.xslt.function" extension-element-prefixes="helper" version="2.0"> 
	 <xsl:template match="TestXML"> 
		 <xsl:element name="TestElement"> 
			 <xsl:for-each select="./Guids"> 
				 <xsl:element name="serialNum"> 
					 <xsl:value-of select="serialNum"/> 
				 </xsl:element> 
				 <xsl:element name="TestGuid"> 
					 <xsl:value-of select="func:genGuid()"/> 
				 </xsl:element> 
			 </xsl:for-each> 
		 </xsl:element> 
	 </xsl:template> 
	 <xsl:function name="func:genGuid"> 
		 <xsl:value-of select="helper:genGUID()"/> 
	 </xsl:function> 
 </xsl:stylesheet> 

 **Output 	 ** 
 <?xml version="1.0" encoding="UTF-8"?> 
 <TestElement> 
	 <serialNum>1</serialNum> 
	 <TestGuid>D5CAF5D4-8C05-408A-B56A-A277A8F33975</TestGuid> 
	 <serialNum>2</serialNum> 
	 <TestGuid>D5CAF5D4-8C05-408A-B56A-A277A8F33975</TestGuid> 
 </TestElement> 
 ``` 

 **Case2:If I use the custom function directly inside the for-each(instead of template/function) then also it is producing the same guid as above which is not expected.** 

 **Case3:Using template inside Xslt is producing the correct result** 

 ``` 
 <?xml version="1.0" encoding="UTF-8"?> 
 <xsl:stylesheet 
	 xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
	 xmlns:xs="http://www.w3.org/2001/XMLSchema" 
	 xmlns:helper="com.test.xslt.function" extension-element-prefixes="helper" version="2.0"> 
	 <xsl:template match="TestXML"> 
		 <xsl:element name="TestElement"> 
			 <xsl:for-each select="./Guids"> 
				 <xsl:element name="serialNum"> 
					 <xsl:value-of select="serialNum"/> 
				 </xsl:element> 
				 <xsl:element name="TestGuid"> 
					 <xsl:call-template name="genGUID"/> 
				 </xsl:element> 
			 </xsl:for-each> 
		 </xsl:element> 
	 </xsl:template> 
	 <xsl:template name="genGUID"> 
		 <xsl:value-of select="helper:genGUID()"/> 
	 </xsl:template> 
 </xsl:stylesheet> 
 ``` 

 **Output:** 
 ``` 
 <?xml version="1.0" encoding="UTF-8"?> 
 <TestElement> 
	 <serialNum>1</serialNum> 
	 <TestGuid>E75AE452-4B7F-4CF8-A6CE-64DE81687384</TestGuid> 
	 <serialNum>2</serialNum> 
	 <TestGuid>771D2C44-8216-4CA7-B43A-2CBEB03AF7F3</TestGuid> 
 </TestElement> 
 ``` 



 **Customer function implementation:** 
 ``` 
 package com.test.xslt.function; 

 import java.util.UUID; 

 import net.sf.saxon.s9api.ExtensionFunction; 
 import net.sf.saxon.s9api.QName; 
 import net.sf.saxon.s9api.SaxonApiException; 
 import net.sf.saxon.s9api.SequenceType; 
 import net.sf.saxon.s9api.XdmAtomicValue; 
 import net.sf.saxon.s9api.XdmValue; 

 public class GUIDGenFunction implements ExtensionFunction { 

    @Override 
    public QName getName() { 
       return new QName( "com.test.xslt.function", "genGUID" ); 
    } 
    @Override 
    public SequenceType[] getArgumentTypes() { 
       return new SequenceType[]{}; 
    } 

    @Override 
    public SequenceType getResultType() { 
       return SequenceType.ANY; 
    } 

    @Override 
    public XdmValue call( XdmValue[] arguments ) throws SaxonApiException { 
       String result = UUID.randomUUID().toString().toUpperCase(); 
       System.out.println( "GUID Result " + result ); 
       return new XdmAtomicValue( result ); 
    } 
 } 
 ExtensionFunction genGUIDFunction = new GUIDGenFunction(); 
 processor.registerExtensionFunction( genGUIDFunction ); 

 ``` 
 Please let me know why it is not working as expected in case1&2.  

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