Saxon

With Saxon 10.9 and Saxon 12.0, (HE or PE) , with the attached (new-context.zip) Java and XSLT we get an AssertionError instead of the expected XPathException which was thrown in previous Saxon versions (10.5 for example). Here is the output with Saxon 10.9:

saxon product version: 10.9
local param name: always-assume-indentation
local param name: is-indented
java.lang.AssertionError: No current component
        at net.sf.saxon.expr.GlobalVariableReference.evaluateVariable(GlobalVariableReference.java:119)
        at net.sf.saxon.expr.GlobalVariableReference.evaluateVariable(GlobalVariableReference.java:26)
        at net.sf.saxon.expr.VariableReference.iterate(VariableReference.java:568)
        at net.sf.saxon.expr.Expression.effectiveBooleanValue(Expression.java:890)
        at net.sf.saxon.expr.OrExpression.effectiveBooleanValue(OrExpression.java:137)
        at net.sf.saxon.expr.BooleanExpression.evaluateItem(BooleanExpression.java:174)
        at net.sf.saxon.expr.BooleanExpression.evaluateItem(BooleanExpression.java:27)
        at net.sf.saxon.expr.Expression.iterate(Expression.java:872)
        at net.sf.saxon.expr.instruct.GlobalVariable.getSelectValue(GlobalVariable.java:661)
        at net.sf.saxon.expr.instruct.GlobalVariable.actuallyEvaluate(GlobalVariable.java:745)
        at net.sf.saxon.expr.instruct.GlobalParam.evaluateVariable(GlobalParam.java:92)
        at net.sf.saxon.expr.instruct.GlobalParam.evaluateVariable(GlobalParam.java:101)
        at com.deltaxml.app.App.run(App.java:48)

The AssertionError is thrown when we attempt to evaluate a specific 'is-indented' parameter that requires a context node as part of an 'or' expression. If we change the expression by just keeping the right-hand operand of the 'or' expression, we get the expected XPathException.

The main Java function is:

    public void run() throws SaxonApiException, XPathException {
        Processor proc = new Processor(false);
        System.out.println("saxon product version: " + proc.getSaxonProductVersion());
        XsltCompiler xsltCompiler = proc.newXsltCompiler();
        compiledExecutable = xsltCompiler.compile(new StreamSource(new File("new-context/src/resources/test.xsl")));
        loadedExecutable = compiledExecutable.load();

        Controller controller = loadedExecutable.getUnderlyingController();
        controller.initializeController(new GlobalParameterSet());
        controller.preEvaluateGlobals(controller.newXPathContext());
        Iterator<GlobalParam> gps = controller.getExecutable().getGlobalParameters().values().iterator();


        while (gps.hasNext()) {
            GlobalParam gp= gps.next();
            String localName = gp.getVariableQName().getLocalPart();
            System.out.println("local param name: " + localName);
            gp.evaluateVariable(controller.newXPathContext());      
          }
    }

Here's the XSLT

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:xs="http://www.w3.org/2001/XMLSchema"
                version="3.0">

  <xsl:output method="xml" indent="yes"/>
  <xsl:mode on-no-match="shallow-copy"/>
  
  <xsl:param name="always-assume-indentation" as="xs:boolean" select="false()"/> 

  <xsl:param name="is-indented" as="xs:boolean"
    select="$always-assume-indentation or exists(/*[text()])"/>

  <xsl:template match="/*" mode="#all">
    <xsl:copy>
      <xsl:attribute name="is-indented" select="$is-indented"/>
      <xsl:apply-templates select="@*, node()" mode="#current"/>
    </xsl:copy>
  </xsl:template>
 
</xsl:stylesheet>