diff -r b4940ef87438 -r 05224402145d emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/MethodImpl.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/MethodImpl.java	Wed Jan 23 20:39:23 2013 +0100
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package org.apidesign.bck2brwsr.emul;
+
+import java.lang.reflect.Method;
+import java.util.Enumeration;
+import org.apidesign.bck2brwsr.core.JavaScriptBody;
+
+/** Utilities to work on methods.
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+public abstract class MethodImpl {
+    public static MethodImpl INSTANCE;
+    static {
+        try {
+            Class.forName(Method.class.getName());
+        } catch (ClassNotFoundException ex) {
+            throw new IllegalStateException(ex);
+        }
+    }
+    
+    protected abstract Method create(Class<?> declaringClass, String name, Object data, String sig);
+    
+    
+    //
+    // bck2brwsr implementation
+    //
+
+    @JavaScriptBody(args = {"clazz", "prefix"},
+        body = ""
+        + "var c = clazz.cnstr.prototype;"
+        + "var arr = new Array();\n"
+        + "for (m in c) {\n"
+        + "  if (m.indexOf(prefix) === 0) {\n"
+        + "     arr.push(m);\n"
+        + "     arr.push(c[m]);\n"
+        + "  }"
+        + "}\n"
+        + "return arr;")
+    private static native Object[] findMethodData(
+        Class<?> clazz, String prefix);
+
+    public static Method findMethod(
+        Class<?> clazz, String name, Class<?>... parameterTypes) {
+        Object[] data = findMethodData(clazz, name + "__");
+        BIG: for (int i = 0; i < data.length; i += 2) {
+            String sig = ((String) data[0]).substring(name.length() + 2);
+            Method tmp = INSTANCE.create(clazz, name, data[1], sig);
+            Class<?>[] tmpParms = tmp.getParameterTypes();
+            if (parameterTypes.length != tmpParms.length) {
+                continue;
+            }
+            for (int j = 0; j < tmpParms.length; j++) {
+                if (!parameterTypes[j].equals(tmpParms[j])) {
+                    continue BIG;
+                }
+            }
+            return tmp;
+        }
+        return null;
+    }
+
+    public static Method[] findMethods(Class<?> clazz, int mask) {
+        Object[] namesAndData = findMethodData(clazz, "");
+        int cnt = 0;
+        for (int i = 0; i < namesAndData.length; i += 2) {
+            String sig = (String) namesAndData[i];
+            Object data = namesAndData[i + 1];
+            int middle = sig.indexOf("__");
+            if (middle == -1) {
+                continue;
+            }
+            String name = sig.substring(0, middle);
+            sig = sig.substring(middle + 2);
+            final Method m = INSTANCE.create(clazz, name, data, sig);
+            if ((m.getModifiers() & mask) == 0) {
+                continue;
+            }
+            namesAndData[cnt++] = m;
+        }
+        Method[] arr = new Method[cnt];
+        for (int i = 0; i < cnt; i++) {
+            arr[i] = (Method) namesAndData[i];
+        }
+        return arr;
+    }
+
+    public static int signatureElements(String sig) {
+        Enumeration<Class> en = signatureParser(sig);
+        int cnt = 0;
+        while (en.hasMoreElements()) {
+            en.nextElement();
+            cnt++;
+        }
+        return cnt;
+    }
+    
+    public static Enumeration<Class> signatureParser(final String sig) {
+        class E implements Enumeration<Class> {
+            int pos;
+            
+            public boolean hasMoreElements() {
+                return pos < sig.length();
+            }
+
+            public Class nextElement() {
+                switch (sig.charAt(pos++)) {
+                    case 'I':
+                        return Integer.TYPE;
+                    case 'J':
+                        return Long.TYPE;
+                    case 'D':
+                        return Double.TYPE;
+                    case 'F':
+                        return Float.TYPE;
+                    case 'B':
+                        return Byte.TYPE;
+                    case 'Z':
+                        return Boolean.TYPE;
+                    case 'S':
+                        return Short.TYPE;
+                    case 'V':
+                        return Void.TYPE;
+                    case 'C':
+                        return Character.TYPE;
+                    case 'L':
+                        try {
+                            int up = sig.indexOf("_2");
+                            String type = sig.substring(1, up);
+                            pos = up + 2;
+                            return Class.forName(type);
+                        } catch (ClassNotFoundException ex) {
+                            // should not happen
+                        }
+                }
+                throw new UnsupportedOperationException(sig + " at " + pos);
+            }
+        }
+        return new E();
+    }
+}