Class IntegerRange

    • Field Detail

      • start

        public long start
      • end

        public long end
    • Constructor Detail

      • IntegerRange

        public IntegerRange​(long start,
                            long end)
                     throws XPathException
        Construct an integer range expression
        Parameters:
        start - the first integer in the sequence (inclusive)
        end - the last integer in the sequence (inclusive). Must be >= start
        Throws:
        XPathException - if the sequence is longer than the Saxon limit (2^31)
    • Method Detail

      • getStart

        public long getStart()
        Get the first integer in the sequence (inclusive)
        Returns:
        the first integer in the sequence (inclusive)
      • getEnd

        public long getEnd()
        Get the last integer in the sequence (inclusive)
        Returns:
        the last integer in the sequence (inclusive)
      • iterate

        public SequenceIterator<IntegerValue> iterate()
                                               throws XPathException
        Return an Iterator to iterate over the values of a sequence. The value of every expression can be regarded as a sequence, so this method is supported for all expressions. This default implementation handles iteration for expressions that return singleton values: for non-singleton expressions, the subclass must provide its own implementation.
        Specified by:
        iterate in class Value<IntegerValue>
        Returns:
        a SequenceIterator that can be used to iterate over the result of the expression
        Throws:
        XPathException - if any dynamic error occurs evaluating the expression
      • getItemType

        public ItemType getItemType​(TypeHierarchy th)
        Determine the data type of the items in the expression, if possible
        Overrides:
        getItemType in class Value<IntegerValue>
        Parameters:
        th - the type hierarchy cache
        Returns:
        AnyItemType (not known)
      • itemAt

        public IntegerValue itemAt​(int n)
        Get the n'th item in the sequence (starting from 0). This is defined for all Values, but its real benefits come for a sequence Value stored extensionally (or for a MemoClosure, once all the values have been read)
        Specified by:
        itemAt in interface GroundedValue<IntegerValue>
        Overrides:
        itemAt in class Value<IntegerValue>
        Parameters:
        n - position of the required item, counting from zero.
        Returns:
        the n'th item in the sequence, where the first item in the sequence is numbered zero. If n is negative or >= the length of the sequence, returns null.
      • subsequence

        public GroundedValue<IntegerValue> subsequence​(int start,
                                                       int length)
        Get a subsequence of the value
        Specified by:
        subsequence in interface GroundedValue<IntegerValue>
        Parameters:
        start - the index of the first item to be included in the result, counting from zero. A negative value is taken as zero. If the value is beyond the end of the sequence, an empty sequence is returned
        length - the number of items to be included in the result. Specify Integer.MAX_VALUE to get the subsequence up to the end of the base sequence. If the value is negative, an empty sequence is returned. If the value goes off the end of the sequence, the result returns items up to the end of the sequence
        Returns:
        the required subsequence.