ConcurrentHashSet has dropped

src/main/java/com/corundumstudio/socketio/misc/ConcurrentHashSet.java

@@ -1,99 +0,0 @@
-/**
- * Copyright 2012 Nikita Koksharov
- *
- * 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.corundumstudio.socketio.misc;
-
-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;
-
-/**
- * Adapter for ConcurrentHashMap, a-la jdk 1.6+ Collections.newSetFromMap(new ConcurrentHashMap....) idiom
- *
- * @author radu.cirstoiu@gmail.com
- */
-public class ConcurrentHashSet<E> extends AbstractSet<E> implements Set<E> {
-    private final Map<E, Boolean> backingMap;
-    private final Set<E> backingMapSet;
-
-    public ConcurrentHashSet() {
-        backingMap = new ConcurrentHashMap<E, Boolean>();
-        backingMapSet = backingMap.keySet();
-    }
-
-    public int size() {
-        return backingMap.size();
-    }
-
-    public boolean isEmpty() {
-        return backingMap.isEmpty();
-    }
-
-    public boolean contains(Object o) {
-        return backingMap.containsKey(o);
-    }
-
-    public Iterator<E> iterator() {
-        return backingMapSet.iterator();
-    }
-
-    public void clear() {
-        backingMap.clear();
-    }
-
-    public Object[] toArray() {
-        return backingMapSet.toArray();
-    }
-
-    public <T> T[] toArray(T[] a) {
-        return backingMapSet.toArray(a);
-    }
-
-    public boolean add(E e) {
-        return backingMap.put(e, Boolean.TRUE) == null;
-    }
-
-    public boolean remove(Object o) {
-        return backingMap.remove(o) != null;
-    }
-
-    public boolean containsAll(Collection<?> c) {
-        return backingMapSet.containsAll(c);
-    }
-
-    public boolean removeAll(Collection<?> c) {
-        return backingMapSet.removeAll(c);
-    }
-
-    public boolean retainAll(Collection<?> c) {
-        return backingMapSet.retainAll(c);
-    }
-
-    public String toString() {
-        return backingMapSet.toString();
-    }
-
-    public int hashCode() {
-        return backingMapSet.hashCode();
-    }
-
-    public boolean equals(Object o) {
-        return o == this || backingMapSet.equals(o);
-    }
-
-}