예제 #1
0
  @Override
  public void remove(Range<C> rangeToRemove) {
    checkNotNull(rangeToRemove);

    if (rangeToRemove.isEmpty()) {
      return;
    }

    // We will use { } to illustrate ranges currently in the range set, and < >
    // to illustrate rangeToRemove.

    Entry<Cut<C>, Range<C>> entryBelowLB = rangesByLowerCut.lowerEntry(rangeToRemove.lowerBound);
    if (entryBelowLB != null) {
      // { <
      Range<C> rangeBelowLB = entryBelowLB.getValue();
      if (rangeBelowLB.upperBound.compareTo(rangeToRemove.lowerBound) >= 0) {
        // { < }, and we will need to subdivide
        if (rangeBelowLB.upperBound.compareTo(rangeToRemove.upperBound) >= 0) {
          // { < > }
          replaceRangeWithSameLowerBound(
              new Range<C>(rangeToRemove.upperBound, rangeBelowLB.upperBound));
        }
        replaceRangeWithSameLowerBound(
            new Range<C>(rangeBelowLB.lowerBound, rangeToRemove.lowerBound));
      }
    }

    Entry<Cut<C>, Range<C>> entryBelowUB = rangesByLowerCut.floorEntry(rangeToRemove.upperBound);
    if (entryBelowUB != null) {
      // { >
      Range<C> rangeBelowUB = entryBelowUB.getValue();
      if (rangeBelowUB.upperBound.compareTo(rangeToRemove.upperBound) >= 0) {
        // { > }
        replaceRangeWithSameLowerBound(
            new Range<C>(rangeToRemove.upperBound, rangeBelowUB.upperBound));
      }
    }

    rangesByLowerCut.subMap(rangeToRemove.lowerBound, rangeToRemove.upperBound).clear();
  }
예제 #2
0
  @Override
  public void add(Range<C> rangeToAdd) {
    checkNotNull(rangeToAdd);

    if (rangeToAdd.isEmpty()) {
      return;
    }

    // We will use { } to illustrate ranges currently in the range set, and < >
    // to illustrate rangeToAdd.
    Cut<C> lbToAdd = rangeToAdd.lowerBound;
    Cut<C> ubToAdd = rangeToAdd.upperBound;

    Entry<Cut<C>, Range<C>> entryBelowLB = rangesByLowerCut.lowerEntry(lbToAdd);
    if (entryBelowLB != null) {
      // { <
      Range<C> rangeBelowLB = entryBelowLB.getValue();
      if (rangeBelowLB.upperBound.compareTo(lbToAdd) >= 0) {
        // { < }, and we will need to coalesce
        if (rangeBelowLB.upperBound.compareTo(ubToAdd) >= 0) {
          // { < > }
          ubToAdd = rangeBelowLB.upperBound;
          /*
           * TODO(cpovirk): can we just "return;" here? Or, can we remove this if() entirely? If
           * not, add tests to demonstrate the problem with each approach
           */
        }
        lbToAdd = rangeBelowLB.lowerBound;
      }
    }

    Entry<Cut<C>, Range<C>> entryBelowUB = rangesByLowerCut.floorEntry(ubToAdd);
    if (entryBelowUB != null) {
      // { >
      Range<C> rangeBelowUB = entryBelowUB.getValue();
      if (rangeBelowUB.upperBound.compareTo(ubToAdd) >= 0) {
        // { > }, and we need to coalesce
        ubToAdd = rangeBelowUB.upperBound;
      }
    }

    // Remove ranges which are strictly enclosed.
    rangesByLowerCut.subMap(lbToAdd, ubToAdd).clear();

    replaceRangeWithSameLowerBound(new Range<C>(lbToAdd, ubToAdd));
  }