Adding AAF docs and making inspection verify that files were found.

documentation/aaf-readme.txt

@@ -0,0 +1,50 @@
+Apple Archive Format
+Version 1.01
+
+COPYRIGHT 1990 by Jonathan A. Chandross.
+All Rights Reserved.
+
+The AAF is a simple archive format designed for shipping around Apple
+source code.  An archive consists of a series of lines.  Each line is
+interpreted according to the first character of the line.  The
+interpretations are:
+
+	=       the name of the unpacked file starting here
+	-       a source line to be unpacked into the current file
+	+       end of archive.
+
+Lines beginning with any other character are simply output to the console.
+
+A simple example of this format:
+	From: random@foobar.com
+	To: freeworld
+	Subject: First program.
+			R.
+	=helloworld.c
+	-main()
+	-{
+	-       printf("Hello World\n");
+	-}
+	=Read.Me
+	-Test out a C compiler; just compile and execute.
+	+ All done.
+	J. Random Hacker
+	random@foobar.com
+
+This file would create the files "helloworld.c" and "Read.Me".  When
+the archive was unpacked, all of the non-source and non-file-name
+lines would be output to the console until the '+' was encountered.
+
+Using '=' to specify a file name and '-' to specify a line of source
+allows a standard USENET or email file to be unpacked without removing
+any preamble or trailing information.
+
+The '+' at the end of the file indicates the end of an archive.  Lines
+occurring past this point will not be processed at all.
+
+The '=' and "+" sentinels are due to Doug Gwyn.
+
+
+Jonathan A. Chandross
+jac@paul.rutgers.edu
+November 1990

lib/ac-api/src/main/java/org/applecommander/archive/aaf/AppleArchiveFormatFileStoreFactory.java

@@ -27,7 +27,11 @@ public class AppleArchiveFormatFileStoreFactory implements FileStoreFactory {
     public void inspect(Context ctx) {
         DataBuffer data = ctx.source.readAllBytes();
         if (data.matches(ch -> (Character.isWhitespace(ch) || (ch >= 0x20 && ch <= 0x7f)))) {
-            ctx.fileStores.add(new AppleArchiveFormatFileStore(ctx.source));
+            // It sort of looks like one; process the file and see if we catch any files!
+            AppleArchiveFormatFileStore aaf = new AppleArchiveFormatFileStore(ctx.source);
+            if (!aaf.getRootDirectory().getFiles().isEmpty()) {
+                ctx.fileStores.add(aaf);
+            }
         }
     }
 }