Package net.sf.saxon.value

Class Cardinality

  • public final class Cardinality
extends java.lang.Object
    This class contains static methods to manipulate the cardinality property of a type. Cardinality of expressions is denoted by one of the values ONE_OR_MORE, ZERO_OR_MORE, ZERO_OR_ONE, EXACTLY_ONE, or EMPTY. These are combinations of the three bit-significant values ALLOWS_ZERO, ALLOWS_ONE, and ALLOWS_MANY.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static int add​(int c1, int c2)
      Add two cardinalities
      static boolean allowsMany​(int cardinality)
      Determine whether multiple occurrences are allowed
      static boolean allowsZero​(int cardinality)
      Determine whether empty sequence is allowed
      static java.lang.String getOccurrenceIndicator​(int cardinality)
      Get the occurence indicator representing the cardinality
      static int multiply​(int c1, int c2)
      Multiply two cardinalities
      static boolean subsumes​(int c1, int c2)
      Test if one cardinality subsumes another.
      static int sum​(int c1, int c2)
      Form the sum of two cardinalities
      static java.lang.String toString​(int cardinality)
      Display the cardinality
      static int union​(int c1, int c2)
      Form the union of two cardinalities.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • allowsMany

        public static final boolean allowsMany​(int cardinality)
        Determine whether multiple occurrences are allowed

      • allowsZero

        public static final boolean allowsZero​(int cardinality)
        Determine whether empty sequence is allowed

      • union

        public static final int union​(int c1,
                              int c2)
        Form the union of two cardinalities. The cardinality of the expression "if (c) then e1 else e2" is the union of the cardinalities of e1 and e2.
        Parameters:
        c1 - a cardinality
        c2 - another cardinality
        Returns:
        the cardinality that allows both c1 and c2

      • sum

        public static final int sum​(int c1,
                            int c2)
        Form the sum of two cardinalities

      • subsumes

        public static final boolean subsumes​(int c1,
                                     int c2)
        Test if one cardinality subsumes another. Cardinality c1 subsumes c2 if every option permitted by c2 is also permitted by c1.
        Parameters:
        c1 - a cardinality
        c2 - another cardinality
        Returns:
        true if if every option permitted by c2 is also permitted by c1.

      • add

        public static final int add​(int c1,
                            int c2)
        Add two cardinalities

      • multiply

        public static final int multiply​(int c1,
                                 int c2)
        Multiply two cardinalities

      • toString

        public static java.lang.String toString​(int cardinality)
        Display the cardinality

      • getOccurrenceIndicator

        public static java.lang.String getOccurrenceIndicator​(int cardinality)
        Get the occurence indicator representing the cardinality