diff -r 000000000000 -r 71aab30ab2b7 src/main/java/org/apidesign/java4browser/ByteCodeToJavaScript.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/apidesign/java4browser/ByteCodeToJavaScript.java	Mon Aug 27 05:08:30 2012 +0200
@@ -0,0 +1,121 @@
+/*
+Java 4 Browser Bytecode Translator
+Copyright (C) 2012-2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 2 of the License.
+
+This program 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. Look for COPYING file in the top folder.
+If not, see http://opensource.org/licenses/GPL-2.0.
+*/
+package org.apidesign.java4browser;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+import org.netbeans.modules.classfile.ByteCodes;
+import org.netbeans.modules.classfile.ClassFile;
+import org.netbeans.modules.classfile.Code;
+import org.netbeans.modules.classfile.Method;
+import org.netbeans.modules.classfile.Parameter;
+
+/** Translator of the code inside class files to JavaScript.
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+public final class ByteCodeToJavaScript {
+    private final ClassFile jc;
+    private final Appendable out;
+
+    private ByteCodeToJavaScript(ClassFile jc, Appendable out) {
+        this.jc = jc;
+        this.out = out;
+    }
+    
+    /** Converts a given class file to a JavaScript version.
+     * @param fileName the name of the file we are reading
+     * @param classFile input stream with code of the .class file
+     * @param out a {@link StringBuilder} or similar to generate the output to
+     * @throws IOException if something goes wrong during read or write or translating
+     */
+    public static void compile(String fileName, InputStream classFile, Appendable out) throws IOException {
+        ClassFile jc = new ClassFile(classFile, true);
+        ByteCodeToJavaScript compiler = new ByteCodeToJavaScript(jc, out);
+        for (Method m : jc.getMethods()) {
+            if (m.isStatic()) {
+                compiler.generateStaticMethod(m);
+            }
+        }
+    }
+    private void generateStaticMethod(Method m) throws IOException {
+        out.append("function ").append(
+            jc.getName().getExternalName().replace('.', '_')
+        ).append('_').append(
+            m.getName()
+        );
+        out.append(m.getReturnType());
+        List<Parameter> args = m.getParameters();
+        for (Parameter t : args) {
+            out.append(t.getDescriptor());
+        }
+        out.append('(');
+        String space = "";
+        for (int i = 0; i < args.size(); i++) {
+            out.append(space);
+            out.append("arg").append(String.valueOf(i));
+            space = ",";
+        }
+        out.append(") {").append("\n  var ");
+        final Code code = m.getCode();
+        int len = code.getMaxLocals();
+        space = "";
+        for (int i = 0; i < len; i++) {
+            out.append(space);
+            out.append("var").append(String.valueOf(i));
+            space = ",";
+        }
+        out.append(";\n  var stack = new Array(");
+        out.append(Integer.toString(code.getMaxStack()));
+        out.append(");\n");
+        produceCode(code.getByteCodes());
+        out.append(";\nreturn 1;");
+        out.append("}");
+    }
+
+    private void produceCode(byte[] byteCodes) throws IOException {
+        for (int i = 0; i < byteCodes.length; i++) {
+            int prev = i;
+            out.append("  ");
+            final int c = (byteCodes[i] + 256) % 256;
+            switch (c) {
+                case ByteCodes.bc_aload_0:
+                case ByteCodes.bc_iload_0:
+                    out.append("stack.push(arg0);");
+                    break;
+                case ByteCodes.bc_aload_1:
+                case ByteCodes.bc_iload_1:
+                    out.append("stack.push(arg1);");
+                    break;
+                case ByteCodes.bc_iadd:
+                    out.append("stack.push(stack.pop() + stack.pop());");
+                    break;
+                case ByteCodes.bc_ireturn:
+                    out.append("return stack.pop();");
+            }
+            out.append("/*");
+            for (int j = prev; j <= i; j++) {
+                out.append(" ");
+                final int cc = (byteCodes[j] + 256) % 256;
+                out.append(Integer.toString(cc));
+            }
+            out.append("*/\n");
+        }
+    }
+}