com.cedarsoftware.util.ConcurrentSet Maven / Gradle / Ivy
package com.cedarsoftware.util;
import java.util.Collection;
import java.util.Iterator;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* ConcurrentSet provides a Set that is thread-safe, usable in highly concurrent environments. It provides
* a no-arg constructor that will directly return a ConcurrentSet that is thread-safe. It has a constructor
* that takes a Collection argument and populates its internal Concurrent Set delegate implementation.
*
* @author John DeRegnaucourt ([email protected])
*
* Copyright (c) Cedar Software LLC
*
* 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
*
* License
*
* 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 ConcurrentSet implements Set {
private final Set set;
/**
* Create a new empty ConcurrentSet.
*/
public ConcurrentSet() {
set = ConcurrentHashMap.newKeySet();
}
/**
* Create a new ConcurrentSet instance with data from the passed in Collection. This data is populated into the
* internal set.
* @param col
*/
public ConcurrentSet(Collection col) {
set = ConcurrentHashMap.newKeySet(col.size());
set.addAll(col);
}
// Immutable APIs
public boolean equals(Object other) { return set.equals(other); }
public int hashCode() { return set.hashCode(); }
public String toString() { return set.toString(); }
public boolean isEmpty() { return set.isEmpty(); }
public int size() { return set.size(); }
public boolean contains(Object o) { return set.contains(o); }
public boolean containsAll(Collection c) { return set.containsAll(c); }
public Iterator iterator() { return set.iterator(); }
public Object[] toArray() { return set.toArray(); }
public T1[] toArray(T1[] a) { return set.toArray(a); }
// Mutable APIs
public boolean add(T e) {return set.add(e);}
public boolean addAll(Collection c) { return set.addAll(c); }
public boolean remove(Object o) { return set.remove(o); }
public boolean removeAll(Collection c) { return set.removeAll(c); }
public boolean retainAll(Collection c) { return set.retainAll(c); }
public void clear() { set.clear(); }
}