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+/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0
+ *
+ * The contents of this file are subject to the Mozilla 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/MPL/
+ *
+ * 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 the Initial Developer are Copyright (C) 1997-1999
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Norris Boyd
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU General Public License Version 2 or later (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
+ * MPL, indicate your decision by deleting the provisions above and replacing
+ * 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 MPL or the GPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+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);
+  }
+}