Package net.sf.saxon.expr.parser

Class ParserExtension

java.lang.Object
net.sf.saxon.expr.parser.ParserExtension
public class ParserExtension extends Object
Dummy Parser extension for syntax in XPath that is accepted only in Saxon-PE and -EE. Primarily, this means XPath 3.0 syntax associated with higher-order functions.

  • Constructor Details

    • ParserExtension

      public ParserExtension()

  • Method Details

    • parseNamedFunctionReference

      public Expression parseNamedFunctionReference(XPathParser p) throws XPathException
      Parse a literal function item (function#arity). On entry, the function name and the '#' token have already been read
      Parameters:
      p - the parser
      Returns:
      an expression representing the function value
      Throws:
      XPathException - in the event of a syntax error

    • parseFunctionItemType

      public ItemType parseFunctionItemType(XPathParser p, AnnotationList annotations) throws XPathException
      Parse the item type used for function items (XQuery 3.0 higher order functions) Syntax (changed by WG decision on 2009-09-22): function '(' '*' ') | function '(' (SeqType (',' SeqType)*)? ')' 'as' SeqType For backwards compatibility with Saxon 9.2 we allow the "*" to be omitted for the time being The "function(" has already been read
      Parameters:
      annotations - the list of annotation assertions for this function item type
      Throws:
      XPathException

    • parseExtendedItemType

      public ItemType parseExtendedItemType(XPathParser p) throws XPathException
      Parse an ItemType within a SequenceType
      Returns:
      the ItemType after parsing
      Throws:
      XPathException - if a static error is found

    • parseTildePattern

      public Expression parseTildePattern(XPathParser p) throws XPathException
      Parse an extended XSLT pattern in the form ~type-alias (predicate)*
      Returns:
      the equivalent expression in the form .[. instance of type] (predicate)*
      Throws:
      XPathException

    • makeArgumentPlaceMarker

      public Expression makeArgumentPlaceMarker(XPathParser p) throws XPathException
      Parse a function argument. The special marker "?" is allowed and causes "null" to be returned
      Throws:
      XPathException

    • parseInlineFunction

      protected Expression parseInlineFunction(XPathParser p, AnnotationList annotations) throws XPathException
      Parse an inline function "function" "(" ParamList? ")" ("as" SequenceType)? EnclosedExpr On entry, "function (" has already been read
      Throws:
      XPathException - if a syntax error is found

    • parseSimpleInlineFunction

      public Expression parseSimpleInlineFunction(XPathParser p) throws XPathException
      Throws:
      XPathException

    • makeCurriedFunction

      public Expression makeCurriedFunction(XPathParser parser, int offset, StructuredQName name, Expression[] args, IntSet placeMarkers) throws XPathException
      Process a function call in which one or more of the argument positions are represented as "?" placemarkers (indicating partial application or currying)
      Parameters:
      offset - offset in the query source of the start of the expression
      name - the function call (as if there were no currying)
      args - the arguments (with EmptySequence in the placemarker positions)
      placeMarkers - the positions of the placemarkers @return the curried function
      Throws:
      XPathException

    • findOuterRangeVariable

      public LocalBinding findOuterRangeVariable(XPathParser p, StructuredQName qName)
      When a variable reference occurs within an inline function, it might be a reference to a variable declared outside the inline function (which needs to become part of the closure. This code looks for such an outer variable
      Parameters:
      qName - the name of the variable
      Returns:
      a binding for the variable; this will typically be a binding to a newly added parameter for the innermost function in which the variable reference appears. As a side effect, all the inline functions between the declaration of the variable and its use will have this variable as an additional parameter, each one bound to the corresponding parameter in the containing function.

    • createDynamicCurriedFunction

      public Expression createDynamicCurriedFunction(XPathParser p, Expression functionItem, ArrayList<Expression> args, IntSet placeMarkers) throws XPathException
      Throws:
      XPathException

    • handleExternalFunctionDeclaration

      public void handleExternalFunctionDeclaration(XQueryParser p, XQueryFunction func) throws XPathException
      Throws:
      XPathException

    • parseTypeAliasDeclaration

      public void parseTypeAliasDeclaration(XQueryParser p) throws XPathException
      Parse a type alias declaration. Allowed only in Saxon-PE and higher
      Throws:
      XPathException - if parsing fails

    • parseRevalidationDeclaration

      public void parseRevalidationDeclaration(XQueryParser p) throws XPathException
      Parse the "declare revalidation" declaration. Syntax: not allowed unless XQuery update is in use
      Throws:
      XPathException - if the syntax is incorrect, or is not allowed in this XQuery processor

    • parseUpdatingFunctionDeclaration

      public void parseUpdatingFunctionDeclaration(XQueryParser p) throws XPathException
      Parse an updating function declaration (allowed in XQuery Update only)
      Throws:
      XPathException - if parsing fails or if updating functions are not allowed

    • parseExtendedExprSingle

      protected Expression parseExtendedExprSingle(XPathParser p) throws XPathException
      Throws:
      XPathException