Exceptions not been thrown for transformation errors
----------------------------------------------------

                 Key: XALANJ-2314
                 URL: http://issues.apache.org/jira/browse/XALANJ-2314
             Project: XalanJ2
          Issue Type: Bug
          Components: transformation
    Affects Versions: 2.7
         Environment: Windows 2000,  jre1.5.0_01
            Reporter: Pankaj Bishnoi


I am using Xalan2.7.0 for my transformations. When we transform a stylesheet 
and in style sheet we use sum(12) function. Now sum() is a aggreagate function 
and it should be supplied with node-list. In our case we are supplying 12 as an 
input. Now for this case since the xsl is invalid a transformation exception 
should be thrown. 

Xalan2.7.0 does not throw any exception and only a message is dispalyed on 
console saying "Can not convert #NUMBER to a NodeList!"
For such type of scenarios since the transformation is invalid no output should 
be generated since we do not receive any exception then it works successfully 
even for Invalid stylesheets. For example my stylesheet is::


<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.1" 
xmlns:java="http://xml.apache.org/xslt/java"; 
xmlns:xalan="http://xml.apache.org/xalan"; 
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:m="http://CommodityService.service.momentumWebServices"; 
xmlns:xs="http://www.w3.org/2001/XMLSchema"; 
xmlns:m0="http://ref.gs.domain.momentum.ams.com";>
     <xsl:output method="xml" version="1.0" encoding="ISO-8859-1" indent="yes"/>
      <xsl:template match="/">
          <SOAP-ENV:Envelope>
               <SOAP-ENV:Body>
                    <m:update>
                         <xsl:for-each 
select="/SOAP-ENV:Envelope/SOAP-ENV:Body/m:update/m:MomentumCommodity">
                              <m:MomentumCommodity>
                                   <m0:shortName>
                                        <xsl:value-of select="m0:shortName"/>
                                   </m0:shortName>
                                   <m0:defaultUnitOfMeasure>
                                        <xsl:value-of 
select="m0:defaultUnitOfMeasure"/>
                                   </m0:defaultUnitOfMeasure>
                                   <m0:activeFlag>
                                        <xsl:value-of select="sum(2)"/>
                                   </m0:activeFlag>
                               </m:MomentumCommodity>
                           </xsl:for-each>
                    </m:update>
               </SOAP-ENV:Body>
          </SOAP-ENV:Envelope>
     </xsl:template>
</xsl:stylesheet>

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