Add 'asset' URLConnection; IOUtil uses URLConnection / incr. effeciency; Android ClassLoaderUtil cleanup;

- Add 'asset' URLConnection
  - Please read API doc 'PiggybackURLConnection' and 'AssetURLConnection'

  - Solves generic resource handling where platform locations may differ,
    ie ClassLoader lookup on Android in the 'assets/' subfolder.

  - New Android 'AssetDexClassLoader' uses 'assets/' folder for findResource(..)

  - aapt.signed (our APK ant task)
    - uses 'assets/' folder

    - adds the 'assetsdir' attribute allowing to copy other assets into the APK

- IOUtil uses URLConnection / incr. effeciency
  - using URLConnection on all getResource(..) since URL
    is connected anyways for validation and URLConnection can be used by caller right away

  - String getRelativeOf(URL, String) -> URL getRelativeOf(URL, String)
    - preserves scheme, authority, etc
    - simple parentOf handling, more efficient

  - reusing new 'asset' protocol impl.

- Android ClassLoaderUtil cleanup;
  - Use createClassLoader(..) impl for build-in static jogamp and user APKs,
    which removes code redundancy

Tests: New code path, especially 'assets' are covered by new unit tests, no regressions on Linux.

1 files changed, 4 insertions, 0 deletions

diff --git a/make/build-test.xml b/make/build-test.xml
index 206815f..56c10df 100644
--- a/make/build-test.xml
+++ b/make/build-test.xml
@@ -131,11 +131,15 @@
           <fileset dir="${build_t.java}">
             <include name="${test.junit.rel}/**/*.class"/>
           </fileset>
+          <fileset dir="resources/assets-test">
+            <include name="**" />
+          </fileset>
         </jar>
     </target>
 
     <target name="android.package" depends="java.build,native.build" if="isAndroid">
         <aapt.signed 
+            assetsdir="resources/assets-test"
             jarbuilddir="${build_t}"
             jarbasename="gluegen-test"
             nativebuilddir="${build_t.lib}"