Given that the following snippet works:

List<Integer> testCollection = new ArrayList<Integer>(Arrays.asList(new Integer[] { 1, 2, 3, 4 , 5, 6 })); int result1 = max(testCollection, on(Integer.class).intValue()); int result2 = sum(testCollection, on(Integer.class).intValue());

I would expect those to also work, the same way:

List<Integer> testCollection = new ArrayList<Integer>(Arrays.asList(new Integer[] { 1, 2, 3, 4 , 5, 6 })); int result1 = maxFrom(testCollection).intValue(); int result2 = sumFrom(testCollection).intValue();

But the later raise VerifyError on Android, more precisely when tryng to access some net.sf.cglib.proxy.Enhancer class.

Ljava/lang/reflect/InvocationTargetException;: at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:507) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) at dalvik.system.NativeStart.main(Native Method) Caused by: Ljava/lang/VerifyError;: net.sf.cglib.proxy.Enhancer at ch.lambdaj.proxy.ProxyUtil.createEnhancer(ProxyUtil.java:89) at ch.lambdaj.proxy.ProxyUtil.createProxy(ProxyUtil.java:49) at ch.lambdaj.proxy.ProxyUtil.createIterableProxy(ProxyUtil.java:76) at ch.lambdaj.function.aggregate.ProxyAggregator.createProxyAggregator(ProxyAggregator.java:49) at ch.lambdaj.Lambda.aggregateFrom(Lambda.java:573) at ch.lambdaj.Lambda.aggregateFrom(Lambda.java:556) at ch.lambdaj.Lambda.maxFrom(Lambda.java:856) at com.bt.kraken.app.ui.AuthActivity.onCreate(AuthActivity.java:78) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) at android.app.ActivityThread.access$1500(ActivityThread.java:117) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:130) at android.app.ActivityThread.main(ActivityThread.java:3683) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:507) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) at dalvik.system.NativeStart.main(Native Method)

Aditional Information

• Verified in ambdaj-2.4-with-dependencies.jar
• Especific for Android Platform
• Android DX Tool issues the following warnings for several cglib classes

[2012-05-10 03:00:49 - Kraken Application] Dx warning: Ignoring InnerClasses attribute for an anonymous inner class (net.sf.cglib.util.StringSwitcher$Generator$1) that doesn't come with an associated EnclosingMethod attribute. This class was probably produced by a compiler that did not target the modern .class file format. The recommended solution is to recompile the class from source, using an up-to-date compiler and without specifying any "-target" type options. The consequence of ignoring this warning is that reflective operations on this class will incorrectly indicate that it is not an inner class.

Submitter Insight

Meanwhile, the library is still fully functional and (I guess) its a better option to go for the little more verbose version of the sum/max calls for they might be faster. It would be great to have a smaller version of this library aim at Android specifically. This should save some precious kbytes from the final APK and, if there`s no workaround for this issue, save a lot of time from developers all around.

Back on the issue at hand, this might be caused by a dependency error on some API not included on Android standard J5SE API mirror. I will try and download the lambdaj source and drop it on a standard Android project on Eclipse to see how it fares. Any leads on a possible issue will be apreciated.

Thanks in advance for your great work. I`ll keep you posted on any progress at my side...

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)