// Copyright 2000-2005 the Contributors, as shown in the revision logs.
// Licensed under the Apache Public Source License 2.0 ("the License").
// You may not use this file except in compliance with the License.

package org.ibex.js;

import org.ibex.util.*;
import java.util.*;

public class JSString extends JSPrimitive {
    final String s;
    public JSString(String s) { this.s = s; }
    public int hashCode() { return s.hashCode(); }
    
    public boolean equals(Object o) {
        if(o == this) return true;
        if(o instanceof JSString) {
            return ((JSString)o).s.equals(s);
        } else if(o instanceof JSNumber) {
            return o.equals(this);
        } else {
            return false;
        }
    }
    
    private final static Map internHash = new HashMap();
    static synchronized JS intern(String s) {
        synchronized(internHash) {
            JS js = (JS)internHash.get(s);
            if(js == null) internHash.put(s,js = new Intern(s));
            return js;
        }
    }
    static class Intern extends JSString {
        public Intern(String s) { super(s); }
        protected void finalize() { synchronized(internHash) { internHash.put(s,null); } }
    }
    
    public String coerceToString() { return s; }
}