/*
* Copyright 2015 Goldman Sachs.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.gs.collections.impl.set.sorted.immutable;
import java.io.Serializable;
import java.util.Collection;
import java.util.Comparator;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Set;
import com.gs.collections.api.block.function.Function;
import com.gs.collections.api.block.predicate.Predicate;
import com.gs.collections.api.block.predicate.Predicate2;
import com.gs.collections.api.block.procedure.Procedure;
import com.gs.collections.api.block.procedure.Procedure2;
import com.gs.collections.api.block.procedure.primitive.ObjectIntProcedure;
import com.gs.collections.api.set.sorted.ImmutableSortedSet;
import com.gs.collections.api.set.sorted.SortedSetIterable;
import com.gs.collections.api.stack.MutableStack;
import com.gs.collections.api.tuple.Pair;
import com.gs.collections.impl.EmptyIterator;
import com.gs.collections.impl.factory.SortedSets;
import com.gs.collections.impl.stack.mutable.ArrayStack;
import com.gs.collections.impl.utility.ListIterate;
import net.jcip.annotations.Immutable;
/**
* This is a zero element {@link ImmutableSortedSet} which is created by calling the SortedSets.immutable.empty() method.
*/
@Immutable
final class ImmutableEmptySortedSet<T>
extends AbstractImmutableSortedSet<T>
implements Serializable
{
static final ImmutableSortedSet<?> INSTANCE = new ImmutableEmptySortedSet<Object>();
private static final long serialVersionUID = 2L;
private final Comparator<? super T> comparator;
ImmutableEmptySortedSet()
{
this.comparator = null;
}
ImmutableEmptySortedSet(Comparator<? super T> comparator)
{
this.comparator = comparator;
}
private Object writeReplace()
{
return new ImmutableSortedSetSerializationProxy<T>(this);
}
@Override
public boolean equals(Object other)
{
if (other == this)
{
return true;
}
return other instanceof Set && ((Collection<?>) other).isEmpty();
}
@Override
public int hashCode()
{
return 0;
}
@Override
public ImmutableSortedSet<T> newWith(T element)
{
return SortedSets.immutable.with(this.comparator, element);
}
@Override
public ImmutableSortedSet<T> newWithAll(Iterable<? extends T> elements)
{
return SortedSets.immutable.withAll(this.comparator, elements);
}
@Override
public ImmutableSortedSet<T> newWithout(T element)
{
return this;
}
@Override
public ImmutableSortedSet<T> newWithoutAll(Iterable<? extends T> elements)
{
return this;
}
public int size()
{
return 0;
}
@Override
public boolean contains(Object object)
{
if (object == null)
{
throw new NullPointerException();
}
return false;
}
@Override
public ImmutableSortedSet<T> tap(Procedure<? super T> procedure)
{
return this;
}
public void each(Procedure<? super T> procedure)
{
}
public void forEach(int startIndex, int endIndex, Procedure<? super T> procedure)
{
ListIterate.rangeCheck(startIndex, endIndex, 0);
}
@Override
public void forEachWithIndex(ObjectIntProcedure<? super T> objectIntProcedure)
{
}
public void forEachWithIndex(int fromIndex, int toIndex, ObjectIntProcedure<? super T> objectIntProcedure)
{
ListIterate.rangeCheck(fromIndex, toIndex, 0);
}
@Override
public <P> void forEachWith(Procedure2<? super T, ? super P> procedure, P parameter)
{
}
@Override
public ImmutableSortedSet<T> select(Predicate<? super T> predicate)
{
return this;
}
@Override
public <P> ImmutableSortedSet<T> selectWith(Predicate2<? super T, ? super P> predicate, P parameter)
{
return this;
}
@Override
public ImmutableSortedSet<T> reject(Predicate<? super T> predicate)
{
return this;
}
@Override
public <P> ImmutableSortedSet<T> rejectWith(Predicate2<? super T, ? super P> predicate, P parameter)
{
return this;
}
@Override
public <S> ImmutableSortedSet<S> selectInstancesOf(Class<S> clazz)
{
return (ImmutableSortedSet<S>) this;
}
public Iterator<T> iterator()
{
return EmptyIterator.getInstance();
}
@Override
public T min(Comparator<? super T> comparator)
{
throw new NoSuchElementException();
}
@Override
public T max(Comparator<? super T> comparator)
{
throw new NoSuchElementException();
}
@Override
public T min()
{
throw new NoSuchElementException();
}
@Override
public T max()
{
throw new NoSuchElementException();
}
@Override
public <V extends Comparable<? super V>> T minBy(Function<? super T, ? extends V> function)
{
throw new NoSuchElementException();
}
@Override
public <V extends Comparable<? super V>> T maxBy(Function<? super T, ? extends V> function)
{
throw new NoSuchElementException();
}
@Override
public <S, R extends Collection<Pair<T, S>>> R zip(Iterable<S> that, R target)
{
return target;
}
@Override
public <R extends Collection<Pair<T, Integer>>> R zipWithIndex(R target)
{
return target;
}
@Override
public MutableStack<T> toStack()
{
return ArrayStack.newStack();
}
public T first()
{
throw new NoSuchElementException();
}
public T last()
{
throw new NoSuchElementException();
}
public int indexOf(Object object)
{
return -1;
}
public Comparator<? super T> comparator()
{
return this.comparator;
}
public int compareTo(SortedSetIterable<T> o)
{
return o.size() * -1;
}
public ImmutableSortedSet<T> take(int count)
{
if (count < 0)
{
throw new IllegalArgumentException("Count must be greater than zero, but was: " + count);
}
return this;
}
public ImmutableSortedSet<T> drop(int count)
{
if (count < 0)
{
throw new IllegalArgumentException("Count must be greater than zero, but was: " + count);
}
return this;
}
}