Owner doesn't want to work on Android

[outofrange]

As @perber discovered, Owner can't properly load our properties when running on Android.

The stacktrace is:

java.lang.ExceptionInInitializerError
   at org.obehave.android.application.MyApplication.loadStudy(MyApplication.java:53)
   at org.obehave.android.ui.activities.MainActivity.chooseStudyActivityResult(MainActivity.java:216)
   at org.obehave.android.ui.activities.MainActivity.onActivityResult(MainActivity.java:207)
   at android.app.Activity.dispatchActivityResult(Activity.java:5467)
   at android.app.ActivityThread.deliverResults(ActivityThread.java:3383)
   at android.app.ActivityThread.handleSendResult(ActivityThread.java:3430)
   at android.app.ActivityThread.access$1300(ActivityThread.java:142)
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1251)
   at android.os.Handler.dispatchMessage(Handler.java:102)
   at android.os.Looper.loop(Looper.java:136)
   at android.app.ActivityThread.main(ActivityThread.java:5118)
   at java.lang.reflect.Method.invokeNative(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:515)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
   at dalvik.system.NativeStart.main(Native Method)
Caused by: android.os.NetworkOnMainThreadException
   at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1148)
   at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
   at java.net.InetAddress.getAllByNameImpl(InetAddress.java:251)
   at java.net.InetAddress.getByName(InetAddress.java:304)
   at java.net.InetSocketAddress.<init>(InetSocketAddress.java:105)
   at java.net.InetSocketAddress.<init>(InetSocketAddress.java:90)
   at libcore.net.url.FtpURLConnection.connectInternal(FtpURLConnection.java:219)
   at libcore.net.url.FtpURLConnection.connect(FtpURLConnection.java:191)
   at libcore.net.url.FtpURLConnection.getInputStream(FtpURLConnection.java:300)
   at java.net.URL.openStream(URL.java:470)
   at org.aeonbits.owner.loaders.PropertiesLoader.load(PropertiesLoader.java:41)
   at org.aeonbits.owner.LoadersManager.load(LoadersManager.java:46)
   at org.aeonbits.owner.Config$LoadType$1.load(Config.java:109)
   at org.aeonbits.owner.PropertiesManager.doLoad(PropertiesManager.java:290)
   at org.aeonbits.owner.PropertiesManager.load(PropertiesManager.java:163)
   at org.aeonbits.owner.PropertiesManager.load(PropertiesManager.java:153)
   at org.aeonbits.owner.PropertiesInvocationHandler.<init>(PropertiesInvocationHandler.java:54)
   at org.aeonbits.owner.DefaultFactory.create(DefaultFactory.java:46)
   at org.aeonbits.owner.ConfigCache.getOrCreate(ConfigCache.java:87)
   at org.aeonbits.owner.ConfigCache.getOrCreate(ConfigCache.java:40)
   at org.obehave.util.properties.AppPropertiesHolder.get(AppPropertiesHolder.java:10)
   at org.obehave.service.Study.<clinit>(Study.java:27)
   at org.obehave.android.application.MyApplication.loadStudy(MyApplication.java:53) 
   at org.obehave.android.ui.activities.MainActivity.chooseStudyActivityResult(MainActivity.java:216) 
   at org.obehave.android.ui.activities.MainActivity.onActivityResult(MainActivity.java:207) 
   at android.app.Activity.dispatchActivityResult(Activity.java:5467) 
   at android.app.ActivityThread.deliverResults(ActivityThread.java:3383) 
   at android.app.ActivityThread.handleSendResult(ActivityThread.java:3430) 
   at android.app.ActivityThread.access$1300(ActivityThread.java:142) 
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1251) 
   at android.os.Handler.dispatchMessage(Handler.java:102) 
   at android.os.Looper.loop(Looper.java:136) 
   at android.app.ActivityThread.main(ActivityThread.java:5118) 
   at java.lang.reflect.Method.invokeNative(Native Method) 
   at java.lang.reflect.Method.invoke(Method.java:515) 
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605) 
   at dalvik.system.NativeStart.main(Native Method) 

No idea why Owner thinks it's handling an FtpURLConnection. The URIs are built in PropertiesManager#toURIs(Sources sources, ConfigURIFactory uriFactory) and ConfigURIFactory#newURI(String spec)

Since it's the same piece of code that was touched to fix our ~ expansion issue in Owner, it could be related to some problems when expanding user home on Android (which is done in Util.expandUserHome(String text)):

static String expandUserHome(String text) {
        if (text.equals("~"))
            return system.getProperty("user.home");
        if (text.indexOf("~/") == 0 || text.indexOf("file:~/") == 0 || text.indexOf("jar:file:~/") == 0)
            return text.replaceFirst("~/", fixBackslashForRegex(system.getProperty("user.home")) + "/");
        if (text.indexOf("~\\") == 0 || text.indexOf("file:~\\") == 0 || text.indexOf("jar:file:~\\") == 0)
            return text.replaceFirst("~\\\\", fixBackslashForRegex(system.getProperty("user.home")) + "\\\\");
        return text;
}

As documented by Android, System.getProperty("user.home") is going to return an empty String (or null, not sure what "Empty" means). If it would be an empty String, it would get expanded to file:/obehave/obehave.properties, if it's null, it would throw an NPE because of fixBackslashForRegex.

We're using @Sources({"file:~/obehave/obehave.properties", "classpath:obehave.properties"}) as a source - while an empty user.home can be unexpected and be a bug, I'm still wondering why this would produce to an FTP URI.