RangeValueIterator

public interface RangeValueIterator

Interface for enabling iteration over sets of <int index, int value>, where index is the sorted integer index in ascending order and value, its associated integer value.

The result for each iteration is the consecutive range of <int index, int value> with the same value. Result is represented by <start, limit, value> where

• start is the starting integer of the result range
• limit is 1 after the maximum integer that follows start, such that all integers between start and (limit - 1), inclusive, have the same associated integer value.
• value is the integer value that all integers from start to (limit - 1) share in common.

Hence value(start) = value(start + 1) = .... = value(start + n) = .... = value(limit - 1). However value(start -1) != value(start) and value(limit) != value(start).

Most implementations will be created by factory methods, such as the character type iterator in UCharacter.getTypeIterator. See example below.

Example of use:

 RangeValueIterator iterator = UCharacter.getTypeIterator();
 RangeValueIterator.Element result = new RangeValueIterator.Element();
 while (iterator.next(result)) {
     System.out.println("Codepoint \\u" +
                        Integer.toHexString(result.start) +
                        " to codepoint \\u" +
                        Integer.toHexString(result.limit - 1) +
                        " has the character type " + result.value);
 }
 

Summary

Public methods

public abstract boolean next (RangeValueIterator.Element element)

public abstract void reset ()