Class LocationPathPattern

java.lang.Object
com.icl.saxon.pattern.Pattern
com.icl.saxon.pattern.LocationPathPattern
public final class LocationPathPattern extends Pattern
A LocationPathPattern represents a path, e.g. of the form A/B/C... The components are represented as a linked list, each component pointing to its predecessor

  • Field Details

    • parentPattern

      public Pattern parentPattern

    • ancestorPattern

      public Pattern ancestorPattern

    • nodeTest

      public NodeTest nodeTest

    • filters

      protected Expression[] filters

    • numberOfFilters

      protected int numberOfFilters

    • equivalentExpr

      protected Expression equivalentExpr

    • firstElementPattern

      protected boolean firstElementPattern

    • lastElementPattern

      protected boolean lastElementPattern

    • specialFilter

      protected boolean specialFilter

  • Constructor Details

    • LocationPathPattern

      public LocationPathPattern()

  • Method Details

    • addFilter

      public void addFilter(Expression filter)
      Add a filter to the pattern (while under construction)
      Parameters:
      filter - The predicate (a boolean expression or numeric expression) to be added

    • simplify

      public Pattern simplify() throws XPathException
      Simplify the pattern: perform any context-independent optimisations
      Overrides:
      simplify in class Pattern
      Returns:
      the optimised Pattern
      Throws:
      XPathException

    • matchesX

      public boolean matchesX(NodeInfo node, Context context) throws XPathException
      Determine whether the pattern matches a given node.
      Parameters:
      node - the node to be tested
      Returns:
      true if the pattern matches, else false
      Throws:
      XPathException

    • matches

      public boolean matches(NodeInfo node, Context context) throws XPathException
      Description copied from class: Pattern
      Determine whether this Pattern matches the given Node
      Specified by:
      matches in class Pattern
      Parameters:
      node - The NodeInfo representing the Element or other node to be tested against the Pattern
      context - The context in which the match is to take place. Only relevant if the pattern uses variables.
      Returns:
      true if the node matches the Pattern, false otherwise
      Throws:
      XPathException

    • getNodeType

      public short getNodeType()
      Determine the types of nodes to which this pattern applies. Used for optimisation. For patterns that match nodes of several types, return Node.NODE
      Overrides:
      getNodeType in class Pattern
      Returns:
      the type of node matched by this pattern. e.g. Node.ELEMENT or Node.TEXT

    • getFingerprint

      public int getFingerprint()
      Determine the fingerprint of nodes to which this pattern applies. Used for optimisation.
      Overrides:
      getFingerprint in class Pattern
      Returns:
      the fingerprint of nodes matched by this pattern.

    • isRelative

      public boolean isRelative() throws XPathException
      Determine if the pattern uses positional filters
      Returns:
      true if there is a numeric filter in the pattern, or one that uses the position() or last() functions
      Throws:
      XPathException