package jetbrains.mps.internal.collections.runtime.impl;
/*Generated by MPS */
import jetbrains.mps.internal.collections.runtime.ICollectionSequence;
import java.util.Collection;
import jetbrains.mps.internal.collections.runtime.ISequence;
import jetbrains.mps.baseLanguage.closures.runtime._FunctionTypes;
public class NullCollectionSequence<T> extends NullSequence<T> implements ICollectionSequence<T>, Collection<T> {
protected static Object[] EMPTY_ARRAY = new Object[0];
private static final NullCollectionSequence<Object> INSTANCE = new NullCollectionSequence<Object>();
protected NullCollectionSequence() {
}
@Override
public T addElement(T t) {
return null;
}
@Override
public ICollectionSequence<T> addSequence(ISequence<? extends T> seq) {
return this;
}
@Override
public T removeElement(T t) {
return null;
}
@Override
public ICollectionSequence<T> removeSequence(ISequence<? extends T> seq) {
return this;
}
@Override
public ICollectionSequence<T> removeWhere(_FunctionTypes._return_P1_E0<? extends Boolean, ? super T> filter) {
return this;
}
@Override
public boolean add(T o) {
return false;
}
@Override
public boolean addAll(Collection<? extends T> c) {
return false;
}
@Override
public void clear() {
}
@Override
public boolean contains(Object o) {
return false;
}
@Override
public boolean containsAll(Collection<?> c) {
return false;
}
@Override
public boolean remove(Object o) {
return false;
}
@Override
public boolean removeAll(Collection<?> c) {
return false;
}
@Override
public boolean retainAll(Collection<?> c) {
return false;
}
@Override
public ICollectionSequence<T> asUnmodifiable() {
return this;
}
@Override
public ICollectionSequence<T> asSynchronized() {
return this;
}
@Override
public int size() {
return 0;
}
@Override
public Object[] toArray() {
return EMPTY_ARRAY;
}
@SuppressWarnings(value = "unchecked")
@Override
public <U> U[] toArray(U[] a) {
return (U[]) EMPTY_ARRAY;
}
@SuppressWarnings(value = "unchecked")
public static <U> NullCollectionSequence<U> instance() {
return (NullCollectionSequence<U>) NullCollectionSequence.INSTANCE;
}
}