NullSortedSetSequence.java

package jetbrains.mps.internal.collections.runtime.impl;

/*Generated by MPS */

import jetbrains.mps.internal.collections.runtime.ISortedSetSequence;
import java.util.SortedSet;
import jetbrains.mps.internal.collections.runtime.ISequence;
import java.util.Comparator;

public class NullSortedSetSequence<T> extends NullSetSequence<T> implements ISortedSetSequence<T>, SortedSet<T> {
  private static final NullSortedSetSequence<Object> INSTANCE = new NullSortedSetSequence<Object>();
  protected NullSortedSetSequence() {
  }
  @Override
  public ISortedSetSequence<T> headSet(T toElement) {
    return this;
  }
  @Override
  public ISortedSetSequence<T> subSet(T fromElement, T toElement) {
    return this;
  }
  @Override
  public ISortedSetSequence<T> tailSet(T fromElement) {
    return this;
  }
  @Override
  public ISortedSetSequence<T> addSequence(ISequence<? extends T> seq) {
    return this;
  }
  @Override
  public ISortedSetSequence<T> removeSequence(ISequence<? extends T> seq) {
    return this;
  }
  @Override
  public Comparator<? super T> comparator() {
    return null;
  }
  @Override
  public ISortedSetSequence<T> asUnmodifiable() {
    return this;
  }
  @Override
  public ISortedSetSequence<T> asSynchronized() {
    return this;
  }
  @SuppressWarnings(value = "unchecked")
  public static <U> NullSortedSetSequence<U> instance() {
    return (NullSortedSetSequence<U>) INSTANCE;
  }
}