de.mklinger.qetcher.client.jetty.util.ConcurrentHashSet Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of qetcher-client-bundle Show documentation

Qetcher Java client, OSGi bundle, minimal dependencies

There is a newer version: 2.0.42.rc

Show newest version

//
//  ========================================================================
//  Copyright (c) 1995-2018 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.util;

import java.util.AbstractSet;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @deprecated Use Java 8 method {@code ConcurrentHashMap.newKeySet()} instead.
 */
@Deprecated
public class ConcurrentHashSet extends AbstractSet implements Set
{
    private final Map _map = new ConcurrentHashMap();
    private transient Set _keys = _map.keySet();

    public ConcurrentHashSet()
    {
    }

    @Override
    public boolean add(E e)
    {
        return _map.put(e,Boolean.TRUE) == null;
    }

    @Override
    public void clear()
    {
        _map.clear();
    }

    @Override
    public boolean contains(Object o)
    {
        return _map.containsKey(o);
    }

    @Override
    public boolean containsAll(Collection c)
    {
        return _keys.containsAll(c);
    }

    @Override
    public boolean equals(Object o)
    {
        return o == this || _keys.equals(o);
    }

    @Override
    public int hashCode()
    {
        return _keys.hashCode();
    }

    @Override
    public boolean isEmpty()
    {
        return _map.isEmpty();
    }

    @Override
    public Iterator iterator()
    {
        return _keys.iterator();
    }

    @Override
    public boolean remove(Object o)
    {
        return _map.remove(o) != null;
    }

    @Override
    public boolean removeAll(Collection c)
    {
        return _keys.removeAll(c);
    }

    @Override
    public boolean retainAll(Collection c)
    {
        return _keys.retainAll(c);
    }

    @Override
    public int size()
    {
        return _map.size();
    }

    @Override
    public Object[] toArray()
    {
        return _keys.toArray();
    }

    @Override
    public  T[] toArray(T[] a)
    {
        return _keys.toArray(a);
    }

    @Override
    public String toString()
    {
        return _keys.toString();
    }
}