/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (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.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Rhino code, released
 * May 6, 1998.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1997-1999 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s):
 * Norris Boyd
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
 * If you wish to allow use of your version of this file only
 * under the terms of the GPL and not to allow others to use your
 * version of this file under the NPL, indicate your decision by
 * deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL.  If you do not delete
 * the provisions above, a recipient may use your version of this
 * file under either the NPL or the GPL.
 */

import org.mozilla.javascript.*;

/**
 * An example WrapFactory that can be used to avoid wrapping of Java types
 * that can be converted to ECMA primitive values.
 * So java.lang.String is mapped to ECMA string, all java.lang.Numbers are
 * mapped to ECMA numbers, and java.lang.Booleans are mapped to ECMA booleans
 * instead of being wrapped as objects. Additionally java.lang.Character is
 * converted to ECMA string with length 1.
 * Other types have the default behavior.
 * <p>
 * Note that calling "new java.lang.String('foo')" in JavaScript with this
 * wrap factory enabled will still produce a wrapped Java object since the
 * WrapFactory.wrapNewObject method is not overridden.
 * <p>
 * The PrimitiveWrapFactory is enabled on a Context by calling setWrapFactory
 * on that context.
 */
public class PrimitiveWrapFactory extends WrapFactory {

  public Object wrap(Context cx, Scriptable scope, Object obj,
                     Class staticType)
  {
    if (obj instanceof String || obj instanceof Number ||
        obj instanceof Boolean)
    {
      return obj;
    } else if (obj instanceof Character) {
      char[] a = { ((Character)obj).charValue() };
      return new String(a);
    }
    return super.wrap(cx, scope, obj, staticType);
  }
}
