Class AlphanumericCollator

  • All Implemented Interfaces:

    public class AlphanumericCollator
    extends java.lang.Object
    implements StringCollator
    A Comparer that treats strings as an alternating sequence of alpha parts and numeric parts. The alpha parts are compared using a base collation supplied as a parameter; the numeric parts are compared numerically. "Numeric" here means a sequence of consecutive ASCII digits 0-9.

    Note: this StringCollator produces an ordering that is not compatible with equals().

    • Constructor Detail

      • AlphanumericCollator

        public AlphanumericCollator​(StringCollator base)
        Create an alphanumeric collation
        base - the collation used to compare the alphabetic parts of the string
    • Method Detail

      • getCollationURI

        public java.lang.String getCollationURI()
        Get the collation URI. It must be possible to use this collation URI to reconstitute the collation
        Specified by:
        getCollationURI in interface StringCollator
        a collation URI that can be used to reconstruct the collation when an XSLT package is reloaded.
      • comparesEqual

        public boolean comparesEqual​(UnicodeString s1,
                                     UnicodeString s2)
        Compare two strings for equality. This may be more efficient than using compareStrings and testing whether the result is zero, but it must give the same result
        Specified by:
        comparesEqual in interface StringCollator
        s1 - the first string
        s2 - the second string
        true if and only if the strings are considered equal,
      • getCollationKey

        public AtomicMatchKey getCollationKey​(UnicodeString cs)
        Get a collation key for a String. The essential property of collation keys is that if (and only if) two strings are equal under the collation, then comparing the collation keys using the equals() method must return true.
        Specified by:
        getCollationKey in interface StringCollator
        cs - the string whose collation key is required
        the collation key