ForwardingSet.java

import java.util.*;

public class ForwardingSet<T> implements Set<T> {

	private final Set<T> set;
	
	ForwardingSet(Set<T> set) {
		this.set = set;	
	}

	public void clear() { set.clear();}
	public boolean contains(Object o) { return set.contains(o); }
	public int size() { return set.size(); }
	public Iterator<T> iterator() { return set.iterator(); }
	public boolean add(T t) { return set.add(t); }
	public boolean addAll(Collection<? extends T> c){ return set.addAll(c); }
	public boolean remove(Object o) { return set.remove(o); }
	public boolean containsAll(Collection<?> c) { return set.containsAll(c); }
	public boolean removeAll(Collection<?> c) { return set.removeAll(c); }
	public boolean retainAll(Collection<?> c) { return set.retainAll(c); }
	public Object[] toArray() { return set.toArray(); }
	public <T> T[] toArray(T[] a) { return set.toArray(a); }
	public boolean isEmpty() {return set.isEmpty();}
	@Override public boolean equals(Object o) { return set.equals(o);}
	@Override public int hashCode() { return set.hashCode(); }
	@Override public String toString() { return set.toString(); }
}