module java.util.HashSet;

import java.lang.all;
import java.util.Set;
import java.util.Collection;
import java.util.Iterator;

static import tango.util.container.HashSet;

class HashSet : Set {
    alias tango.util.container.HashSet.HashSet!(Object) SetType;
    private SetType set;

    public this(){
        set = new SetType();
    }
    public this(Collection c){
        implMissing( __FILE__, __LINE__ );
    }
    public this(int initialCapacity){
        implMissing( __FILE__, __LINE__ );
    }
    public this(int initialCapacity, float loadFactor){
        implMissing( __FILE__, __LINE__ );
    }
    public bool    add(Object o){
        return set.add(o);
    }
    public bool    add(String o){
        return add(stringcast(o));
    }
    public bool    addAll(Collection c){
        implMissing( __FILE__, __LINE__ );
        return false;
    }
    public void   clear(){
        set.clear();
    }
    public bool    contains(Object o){
        return set.contains(o);
    }
    public bool     contains(String o){
        return contains(stringcast(o));
    }
    public bool    containsAll(Collection c){
        implMissing( __FILE__, __LINE__ );
        return false;
    }
    public override int    opEquals(Object o){
        implMissing( __FILE__, __LINE__ );
        return 0;
    }
    public override hash_t    toHash(){
        implMissing( __FILE__, __LINE__ );
        return 0;
    }
    public bool    isEmpty(){
        return set.isEmpty();
    }
    class LocalIterator : Iterator {
        SetType.Iterator iter;
        Object nextElem;
        this( SetType.Iterator iter){
            this.iter = iter;
        }
        public bool hasNext(){
            return iter.next(nextElem);
        }
        public Object next(){
            return nextElem;
        }
        public void  remove(){
            iter.remove();
        }
    }
    public Iterator   iterator(){
        return new LocalIterator(set.iterator());
    }
    public bool    remove(Object o){
        return set.remove(o);
    }
    public bool remove(String key){
        return remove(stringcast(key));
    }
    public bool    removeAll(Collection c){
        implMissing( __FILE__, __LINE__ );
        return false;
    }
    public bool    retainAll(Collection c){
        implMissing( __FILE__, __LINE__ );
        return false;
    }
    public int    size(){
        return set.size();
    }
    public Object[]   toArray(){
        Object[] res;
        res.length = size();
        int idx = 0;
        foreach( o; set ){
            res[idx] = o;
            idx++;
        }
        return res;
    }
    public Object[]   toArray(Object[] a){
        implMissing( __FILE__, __LINE__ );
        return null;
    }
    public override String toString(){
        implMissing( __FILE__, __LINE__ );
        return null;
    }

    // only for D
    public int opApply (int delegate(ref Object value) dg){
        return set.opApply(dg);
    }

}