Class Variable

    • Constructor Detail

      • Variable

        public Variable()
    • Method Detail

      • setIndex

        public void setIndex​(int index)
        Set the index for the variable into the stack. For advanced use only. You must know what you are doing to use this.
        Parameters:
        index - a global or local index.
      • getIndex

        public int getIndex()
        Set the index for the variable into the stack. For advanced use only.
        Returns:
        index a global or local index.
      • setIsGlobal

        public void setIsGlobal​(boolean isGlobal)
        Set whether or not this is a global reference. For advanced use only.
        Parameters:
        isGlobal - true if this should be a global variable reference.
      • getGlobal

        public boolean getGlobal()
        Set the index for the variable into the stack. For advanced use only.
        Returns:
        true if this should be a global variable reference.
      • fixupVariables

        public void fixupVariables​(java.util.Vector vars,
                                   int globalsSize)
        This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
        Specified by:
        fixupVariables in class Expression
        Parameters:
        vars - List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame).
      • setQName

        public void setQName​(QName qname)
        Set the qualified name of the variable.
        Parameters:
        qname - Must be a non-null reference to a qualified name.
      • getQName

        public QName getQName()
        Get the qualified name of the variable.
        Returns:
        A non-null reference to a qualified name.
      • execute

        public XObject execute​(XPathContext xctxt)
                        throws javax.xml.transform.TransformerException
        Execute an expression in the XPath runtime context, and return the result of the expression.
        Specified by:
        execute in class Expression
        Parameters:
        xctxt - The XPath runtime context.
        Returns:
        The result of the expression in the form of a XObject.
        Throws:
        javax.xml.transform.TransformerException - if a runtime exception occurs.
      • execute

        public XObject execute​(XPathContext xctxt,
                               boolean destructiveOK)
                        throws javax.xml.transform.TransformerException
        Dereference the variable, and return the reference value. Note that lazy evaluation will occur. If a variable within scope is not found, a warning will be sent to the error listener, and an empty nodeset will be returned.
        Overrides:
        execute in class Expression
        Parameters:
        xctxt - The runtime execution context.
        destructiveOK - true if a "safe" object doesn't need to be returned.
        Returns:
        The evaluated variable, or an empty nodeset if not found.
        Throws:
        javax.xml.transform.TransformerException
      • getElemVariable

        public ElemVariable getElemVariable()
        Get the XSLT ElemVariable that this sub-expression references. In order for this to work, the SourceLocator must be the owning ElemTemplateElement.
        Returns:
        The dereference to the ElemVariable, or null if not found.
      • isStableNumber

        public boolean isStableNumber()
        Tell if this expression returns a stable number that will not change during iterations within the expression. This is used to determine if a proximity position predicate can indicate that no more searching has to occur.
        Overrides:
        isStableNumber in class Expression
        Returns:
        true if the expression represents a stable number.
      • getAnalysisBits

        public int getAnalysisBits()
        Get the analysis bits for this walker, as defined in the WalkerFactory.
        Specified by:
        getAnalysisBits in interface PathComponent
        Returns:
        One of WalkerFactory#BIT_DESCENDANT, etc.
      • deepEquals

        public boolean deepEquals​(Expression expr)
        Description copied from class: Expression
        Compare this object with another object and see if they are equal, include the sub heararchy.
        Specified by:
        deepEquals in class Expression
        Parameters:
        expr - Another expression object.
        Returns:
        true if this objects class and the expr object's class are the same, and the data contained within both objects are considered equal.
        See Also:
        Expression.deepEquals(Expression)
      • isPsuedoVarRef

        public boolean isPsuedoVarRef()
        Tell if this is a psuedo variable reference, declared by Xalan instead of by the user.