Class ProcessingInstruction

    • Constructor Detail

      • ProcessingInstruction

        public ProcessingInstruction​(Expression name)
        Create an xsl:processing-instruction instruction
        Parameters:
        name - the expression used to compute the name of the generated processing-instruction
    • Method Detail

      • getInstructionNameCode

        public int getInstructionNameCode()
        Get the name of this instruction for diagnostic and tracing purposes
        Overrides:
        getInstructionNameCode in class Instruction
        Returns:
        the string "xsl:processing-instruction"
      • getCardinality

        public int getCardinality()
        Description copied from class: ComputedExpression
        Determine the static cardinality of the expression. This establishes how many items there will be in the result of the expression, at compile time (i.e., without actually evaluating the result.
        Specified by:
        getCardinality in interface Expression
        Overrides:
        getCardinality in class ComputedExpression
        Returns:
        one of the values Cardinality.ONE_OR_MORE, Cardinality.ZERO_OR_MORE, Cardinality.EXACTLY_ONE, Cardinality.ZERO_OR_ONE, Cardinality.EMPTY. This default implementation returns ZERO_OR_MORE (which effectively gives no information).
      • getDependencies

        public int getDependencies()
        Description copied from class: ComputedExpression
        Determine which aspects of the context the expression depends on. The result is a bitwise-or'ed value composed from constants such as XPathContext.VARIABLES and XPathContext.CURRENT_NODE. The default implementation combines the intrinsic dependencies of this expression with the dependencies of the subexpressions, computed recursively. This is overridden for expressions such as FilterExpression where a subexpression's dependencies are not necessarily inherited by the parent expression.
        Specified by:
        getDependencies in interface Expression
        Overrides:
        getDependencies in class ComputedExpression
        Returns:
        a set of bit-significant flags identifying the dependencies of the expression
      • iterateSubExpressions

        public java.util.Iterator iterateSubExpressions()
        Description copied from class: ComputedExpression
        Get the immediate sub-expressions of this expression. Default implementation returns a zero-length array, appropriate for an expression that has no sub-expressions.
        Specified by:
        iterateSubExpressions in interface Expression
        Overrides:
        iterateSubExpressions in class SimpleNodeConstructor
        Returns:
        an iterator containing the sub-expressions of this expression
      • promoteInst

        protected void promoteInst​(PromotionOffer offer)
                            throws XPathException
        Offer promotion for subexpressions. The offer will be accepted if the subexpression is not dependent on the factors (e.g. the context item) identified in the PromotionOffer. By default the offer is not accepted - this is appropriate in the case of simple expressions such as constant values and variable references where promotion would give no performance advantage. This method is always called at compile time.
        Overrides:
        promoteInst in class SimpleNodeConstructor
        Parameters:
        offer - details of the offer, for example the offer to move expressions that don't depend on the context to an outer level in the containing expression
        Throws:
        XPathException - if any error is detected
      • checkContent

        protected java.lang.String checkContent​(java.lang.String data,
                                                XPathContext context)
                                         throws DynamicError
        Check the content of the node, and adjust it if necessary
        Overrides:
        checkContent in class SimpleNodeConstructor
        Parameters:
        data - the supplied content
        context - the dynamic context
        Returns:
        the original content, unless adjustments are needed
        Throws:
        DynamicError - if the content is invalid