NullSortedMapSequence.java

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

/*Generated by MPS */

import jetbrains.mps.internal.collections.runtime.ISortedMapSequence;
import java.util.SortedMap;
import java.util.Comparator;

public class NullSortedMapSequence<U, V> extends NullMapSequence<U, V> implements ISortedMapSequence<U, V>, SortedMap<U, V> {
  public static final NullSortedMapSequence<Object, Object> INSTANCE = new NullSortedMapSequence<Object, Object>();
  protected NullSortedMapSequence() {
  }
  @Override
  public Comparator<? super U> comparator() {
    return null;
  }
  @Override
  public U firstKey() {
    return null;
  }
  @Override
  public ISortedMapSequence<U, V> headMap(U toKey) {
    return this;
  }
  @Override
  public U lastKey() {
    return null;
  }
  @Override
  public ISortedMapSequence<U, V> subMap(U fromKey, U toKey) {
    return this;
  }
  @Override
  public ISortedMapSequence<U, V> tailMap(U fromKey) {
    return this;
  }
  @SuppressWarnings(value = "unchecked")
  public static <P, Q> NullSortedMapSequence<P, Q> instance() {
    return (NullSortedMapSequence<P, Q>) INSTANCE;
  }
}