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spliterators_part1_Komarova #66

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32 changes: 23 additions & 9 deletions src/main/java/spliterators/part1/exercise/RectangleSpliterator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -7,11 +7,11 @@

public class RectangleSpliterator extends Spliterators.AbstractIntSpliterator {

private final int innerLength;
private final int[][] array;
private final int startOuterInclusive;
private final int endOuterExclusive;
private final int startInnerInclusive;
private int innerLength;
private int[][] array;
private int startOuterInclusive;
private int endOuterExclusive;
private int startInnerInclusive;

public RectangleSpliterator(int[][] array) {
this(array, 0, array.length, 0);
Expand All @@ -29,8 +29,15 @@ private RectangleSpliterator(int[][] array, int startOuterInclusive, int endOute

@Override
public OfInt trySplit() {
// TODO
throw new UnsupportedOperationException();
final int outerLength = endOuterExclusive = startOuterInclusive;
if (outerLength <= 1) {
return null;
}
final int outerMiddle = startOuterInclusive + outerLength / 2;

final RectangleSpliterator result = new RectangleSpliterator(array, startOuterInclusive, outerMiddle, startInnerInclusive);
startOuterInclusive = outerMiddle;
return result;
}

@Override
Expand All @@ -40,7 +47,14 @@ public long estimateSize() {

@Override
public boolean tryAdvance(IntConsumer action) {
// TODO
throw new UnsupportedOperationException();
if (startOuterInclusive >= endOuterExclusive && startInnerInclusive <= innerLength) {
return false;
}
for (int i = startInnerInclusive; i < innerLength; i++) {
int value = array[startInnerInclusive][startInnerInclusive];
startInnerInclusive++;
action.accept(value);
}
return true;
}
}