package com.planet_ink.coffee_mud.core.collections;
import java.util.*;
/*
Copyright 2013-2019 Bo Zimmerman
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.
*/
public class ReadOnlyListSet<K> implements Set<K>
{
private final Object[] array;
private final Set<K> set;
public ReadOnlyListSet()
{
set = new TreeSet<K>();
array = new Object[0];
}
public ReadOnlyListSet(final Set<K> s)
{
set = s;
array = s.toArray(new Object[0]);
}
@Override
public boolean add(final K e)
{
throw new java.lang.IllegalArgumentException();
}
@Override
public boolean addAll(final Collection<? extends K> c)
{
throw new java.lang.IllegalArgumentException();
}
@Override
public void clear()
{
throw new java.lang.IllegalArgumentException();
}
@Override
public boolean contains(final Object arg0)
{
return set.contains(arg0);
}
@Override
public boolean containsAll(final Collection<?> arg0)
{
return set.containsAll(arg0);
}
@Override
public boolean isEmpty()
{
return set.isEmpty();
}
@Override
public Iterator<K> iterator()
{
return new ReadOnlyIterator<K>(new Iterator<K>()
{
private int d = 0;
@Override
public boolean hasNext()
{
return d < array.length;
}
@SuppressWarnings("unchecked")
@Override
public K next()
{
if (hasNext())
{
final K o = (K) array[d];
d++;
return o;
}
return null;
}
@Override
public void remove()
{
throw new java.lang.IllegalArgumentException();
}
});
}
@Override
public boolean remove(final Object o)
{
throw new java.lang.IllegalArgumentException();
}
@Override
public boolean removeAll(final Collection<?> c)
{
throw new java.lang.IllegalArgumentException();
}
@Override
public boolean retainAll(final Collection<?> c)
{
throw new java.lang.IllegalArgumentException();
}
@Override
public int size()
{
return array.length;
}
@Override
public Object[] toArray()
{
return array;
}
@Override
public <T> T[] toArray(final T[] arg0)
{
return set.toArray(arg0);
}
}
