Class UnicodeMapIterator<T>

java.lang.Object
com.ibm.icu.impl.UnicodeMapIterator<T>
public class UnicodeMapIterator<T> extends Object
UnicodeSetIterator iterates over the contents of a UnicodeSet. It iterates over either code points or code point ranges. After all code points or ranges have been returned, it returns the multicharacter strings of the UnicodeSet, if any.

To iterate over code points, use a loop like this: 

UnicodeSetIterator it = new UnicodeSetIterator(set);
while (set.next()) {
  if (set.codepoint != UnicodeSetIterator.IS_STRING) {
    processCodepoint(set.codepoint);
  } else {
    processString(set.string);
  }
}

To iterate over code point ranges, use a loop like this: 

UnicodeSetIterator it = new UnicodeSetIterator(set);
while (set.nextRange()) {
  if (set.codepoint != UnicodeSetIterator.IS_STRING) {
    processCodepointRange(set.codepoint, set.codepointEnd);
  } else {
    processString(set.string);
  }
}

  • Field Details

    • IS_STRING

      public static int IS_STRING
      Value of codepoint if the iterator points to a string. If codepoint == IS_STRING, then examine string for the current iteration result.

    • codepoint

      public int codepoint
      Current code point, or the special value IS_STRING, if the iterator points to a string.

    • codepointEnd

      public int codepointEnd
      When iterating over ranges using nextRange(), codepointEnd contains the inclusive end of the iteration range, if codepoint != IS_STRING. If iterating over code points using next(), or if codepoint == IS_STRING, then the value of codepointEnd is undefined.

    • string

      public String string
      If codepoint == IS_STRING, then string points to the current string. If codepoint != IS_STRING, the value of string is undefined.

    • value

      public T value
      The value associated with this element or range.

    • map

      private UnicodeMap<T> map

    • endRange

      private int endRange

    • range

      private int range

    • stringIterator

      private Iterator<String> stringIterator

    • endElement

      protected int endElement

    • nextElement

      protected int nextElement

  • Constructor Details

    • UnicodeMapIterator

      public UnicodeMapIterator(UnicodeMap set)
      Create an iterator over the given set.
      Parameters:
      set - set to iterate over

    • UnicodeMapIterator

      public UnicodeMapIterator()
      Create an iterator over nothing. next() and nextRange() return false. This is a convenience constructor allowing the target to be set later.

  • Method Details

    • next

      public boolean next()
      Returns the next element in the set, either a single code point or a string. If there are no more elements in the set, return false. If codepoint == IS_STRING, the value is a string in the string field. Otherwise the value is a single code point in the codepoint field.

      The order of iteration is all code points in sorted order, followed by all strings sorted order. codepointEnd is undefined after calling this method. string is undefined unless codepoint == IS_STRING. Do not mix calls to next() and nextRange() without calling reset() between them. The results of doing so are undefined.

      Returns:
      true if there was another element in the set and this object contains the element.

    • nextRange

      public boolean nextRange()
      Returns the next element in the set, either a code point range or a string. If there are no more elements in the set, return false. If codepoint == IS_STRING, the value is a string in the string field. Otherwise the value is a range of one or more code points from codepoint to codepointeEnd inclusive.

      The order of iteration is all code points ranges in sorted order, followed by all strings sorted order. Ranges are disjoint and non-contiguous. string is undefined unless codepoint == IS_STRING. Do not mix calls to next() and nextRange() without calling reset() between them. The results of doing so are undefined.

      Returns:
      true if there was another element in the set and this object contains the element.

    • reset

      public void reset(UnicodeMap set)
      Sets this iterator to visit the elements of the given set and resets it to the start of that set. The iterator is valid only so long as set is valid.
      Parameters:
      set - the set to iterate over.

    • reset

      public UnicodeMapIterator<T> reset()
      Resets this iterator to the start of the set.
      Returns:

    • getString

      public String getString()
      Gets the current string from the iterator. Only use after calling next(), not nextRange().

    • loadRange

      protected T loadRange(int range)