NullQueueSequence.java

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

/*Generated by MPS */

import jetbrains.mps.internal.collections.runtime.IQueueSequence;
import java.util.Queue;
import jetbrains.mps.internal.collections.runtime.ISequence;
import jetbrains.mps.baseLanguage.closures.runtime._FunctionTypes;

public class NullQueueSequence<T> extends NullCollectionSequence<T> implements IQueueSequence<T>, Queue<T> {
  private static final NullQueueSequence<Object> INSTANCE = new NullQueueSequence<Object>();
  protected NullQueueSequence() {
  }
  @Override
  public T addLastElement(T t) {
    return null;
  }
  @Override
  public T first() {
    return null;
  }
  @Override
  public T removeFirstElement() {
    return null;
  }
  @Override
  public IQueueSequence<T> addSequence(ISequence<? extends T> seq) {
    return this;
  }
  @Override
  public IQueueSequence<T> removeSequence(ISequence<? extends T> seq) {
    return this;
  }
  @Override
  public IQueueSequence<T> removeWhere(_FunctionTypes._return_P1_E0<? extends Boolean, ? super T> filter) {
    return (IQueueSequence<T>) super.removeWhere(filter);
  }
  @Override
  public IQueueSequence<T> asUnmodifiable() {
    return this;
  }
  @Override
  public IQueueSequence<T> asSynchronized() {
    return this;
  }
  @Override
  public Queue<T> toQueue() {
    return this;
  }
  @Override
  public T element() {
    return null;
  }
  @Override
  public boolean offer(T o) {
    return false;
  }
  @Override
  public T peek() {
    return null;
  }
  @Override
  public T poll() {
    return null;
  }
  @Override
  public T remove() {
    return null;
  }
  @SuppressWarnings(value = "unchecked")
  public static <U> NullQueueSequence<U> instance() {
    return (NullQueueSequence<U>) INSTANCE;
  }
}