Package net.sf.saxon.regex

Class Operation.ForceProgressIterator

java.lang.Object
net.sf.saxon.regex.Operation.ForceProgressIterator
All Implemented Interfaces:
IntIterator
Enclosing class:
Operation
protected static class Operation.ForceProgressIterator extends Object implements IntIterator
The ForceProgressIterator is used to protect against non-termination; specifically, iterators that return an infinite number of zero-length matches. After getting a certain number of zero-length matches at the same position, hasNext() returns false. (Potentially this gives problems with an expression such as (a?|b?|c?|d) that can legitimately return more than one zero-length match).

  • Method Details

    • hasNext

      public boolean hasNext()
      Description copied from interface: IntIterator
      Test whether there are any more integers in the sequence; and change the state of the iterator so a call on IntIterator.next() delivers the next integer.

      The effect of calling #hasNext() a second time without an intervening call on #next() is undefined.

      Specified by:
      hasNext in interface IntIterator
      Returns:
      true if there are more integers to come

    • next

      public int next()
      Description copied from interface: IntIterator
      Return the next integer in the sequence. The result is undefined unless #hasNext() has been called and has returned true.
      Specified by:
      next in interface IntIterator
      Returns:
      the next integer in the sequence