Merge pull request #1049 from uckelman/tile_dir_fix_3.5

V3.5 + 3.6: Use correct cache dir for caching tiles

src/VASL/build/module/map/ASLBoardPicker.java

@@ -56,6 +56,8 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.math.BigInteger;
 import java.net.URL;
 import java.net.URLConnection;
@@ -448,7 +450,7 @@ private void tileBoard(String commonName) {
 
         final ASLTilingHandler th = new ASLTilingHandler(
                 fpath.getAbsolutePath(),
-                new File(Info.getConfDir(), "tiles/" + hstr),
+                new File(getCacheDir(), "tiles/" + hstr),
                 new Dimension(256, 256),
                 1024,
                 42
@@ -461,6 +463,18 @@ private void tileBoard(String commonName) {
         }
     }
 
+    // TODO: Remove this after a release based on Vassal 3.6, and replace
+    // the call to it with Info.getCacheDir().
+    private File getCacheDir() {
+        try {
+          final Method m = Info.class.getDeclaredMethod("getCacheDir");
+          return (File) m.invoke(null);
+        }
+        catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
+          return Info.getConfDir();
+        }
+    }
+
     /**
      * Ensures the given board exists and is up to date. If not it fetches it from the repository
      * @param baseName the board base name (i.e. reversed board may start with r)