JavaAdapter support in Rhino (Implement Interfaces, Abstract Classes and Subclassing)

Using Rhino you cannot implement any Java interface, abstract class or subclass 
a Java class, since JavaAdapter generates Java bytecode which doesn't run on 
Dalvik. (See not working example below.)
The solution would be to either dex the generated java bytecode on the fly, or 
to directly generate dex code instead of java bytecode. The DexMaker project 
seems to be the ideal candidate for this purpose:
DexMaker:
    - http://code.google.com/p/dexmaker/
ProxyBuilder (Utility class in DexMaker):
    - http://dexmaker.googlecode.com/git/javadoc/com/google/dexmaker/stock/ProxyBuilder.html

Custom Class Loading in Dalvik:
    - http://android-developers.blogspot.com/2011/07/custom-class-loading-in-dalvik.html

What device(s) are you experiencing the problem on?
Every device.

What firmware version are you running on the device?
Every firmware.

What steps will reproduce the problem?
Try to execute the following script (implicitly uses JavaAdapter):
########################
var v = new java.lang.Runnable() {
    run: function() {
        // sth..
    }
}   
v.run();
########################

What is the expected output? What do you see instead?
########################
GeneratedClassLoader loader = SecurityController.createLoader(null, 
                staticDomain);
        Class<?> result = loader.defineClass(className, classBytes); // CRASH =( (see below)
########################
java.lang.UnsupportedOperationException: can't load this type of class file
    at java.lang.VMClassLoader.defineClass(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:292)
    at org.mozilla.javascript.DefiningClassLoader.defineClass(DefiningClassLoader.java:62)
    at org.mozilla.javascript.JavaAdapter.loadAdapterClass(JavaAdapter.java:507)
    at org.mozilla.javascript.JavaAdapter.getAdapterClass(JavaAdapter.java:321)
    at org.mozilla.javascript.JavaAdapter.js_createAdapter(JavaAdapter.java:196)
    at org.mozilla.javascript.JavaAdapter.execIdCall(JavaAdapter.java:126)
    at org.mozilla.javascript.IdFunctionObject.call(IdFunctionObject.java:129)
    at org.mozilla.javascript.BaseFunction.construct(BaseFunction.java:338)
    at org.mozilla.javascript.NativeJavaClass.construct(NativeJavaClass.java:214)
    at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3377)
    at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2487)
    at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:164)
    at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:398)
    at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3065)
    at org.mozilla.javascript.InterpretedFunction.exec(InterpretedFunction.java:175)
    at org.mozilla.javascript.Context.evaluateString(Context.java:1104)

Rhino-Exception:
org.mozilla.javascript.EvaluatorException: error instantiating (can't load this 
type of class file): class java.lang.Runnable is interface or abstract
    at org.mozilla.javascript.DefaultErrorReporter.runtimeError(DefaultErrorReporter.java:109)
    at org.mozilla.javascript.Context.reportRuntimeError(Context.java:939)
    at org.mozilla.javascript.Context.reportRuntimeError(Context.java:994)
    at org.mozilla.javascript.Context.reportRuntimeError2(Context.java:964)
    at org.mozilla.javascript.NativeJavaClass.construct(NativeJavaClass.java:223)
    at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3377)
    at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2487)
    at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:164)
    at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:398)
    at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3065)
    at org.mozilla.javascript.InterpretedFunction.exec(InterpretedFunction.java:175)
    at org.mozilla.javascript.Context.evaluateString(Context.java:1104)

What version of the product are you using? On what operating system?
rhino_for_android_r2.apk
rhino1_7R2.jar
Original issue reported on code.google.com by NicolasG...@gmail.com on 15 Jan 2012 at 10:32
michkaravolos / android-scripting

JavaAdapter support in Rhino (Implement Interfaces, Abstract Classes and Subclassing) #593
