Make first real commit: copy of CaRMetal 4.2.8

org/mozilla/javascript/jdk15/VMBridge_jdk15.java

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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, 1999.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1997-2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * 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 ***** */
+
+package org.mozilla.javascript.jdk15;
+
+import java.lang.reflect.Member;
+import java.lang.reflect.Method;
+import java.lang.reflect.Constructor;
+import java.util.Iterator;
+import org.mozilla.javascript.*;
+
+public class VMBridge_jdk15 extends org.mozilla.javascript.jdk13.VMBridge_jdk13
+{
+    public VMBridge_jdk15() throws SecurityException, InstantiationException {
+        try {
+            // Just try and see if we can access the isVarArgs method.
+            // We want to fail loading if the method does not exist
+            // so that we can load a bridge to an older JDK instead.
+            Method.class.getMethod("isVarArgs", (Class[]) null);
+        } catch (NoSuchMethodException e) {
+            // Throw a fitting exception that is handled by
+            // org.mozilla.javascript.Kit.newInstanceOrNull:
+            throw new InstantiationException(e.getMessage());
+        }
+    }
+
+    @Override
+    public boolean isVarArgs(Member member) {
+        if (member instanceof Method)
+            return ((Method) member).isVarArgs();
+        else if (member instanceof Constructor)
+            return ((Constructor<?>) member).isVarArgs();
+        else 
+            return false;
+    }
+    
+    /**
+     * If "obj" is a java.util.Iterator or a java.lang.Iterable, return a
+     * wrapping as a JavaScript Iterator. Otherwise, return null.
+     * This method is in VMBridge since Iterable is a JDK 1.5 addition.
+     */
+    @Override
+    public Iterator<?> getJavaIterator(Context cx, Scriptable scope, Object obj) {
+        if (obj instanceof Wrapper) {
+            Object unwrapped = ((Wrapper) obj).unwrap();
+            Iterator<?> iterator = null;
+            if (unwrapped instanceof Iterator)
+                iterator = (Iterator<?>) unwrapped;
+            if (unwrapped instanceof Iterable)
+                iterator = ((Iterable<?>)unwrapped).iterator();
+            return iterator;
+        }
+        return null;
+    }
+}