Issue1208

E:\0\!_out\jython>java -jar jython_installer-2.2.1.jar
org.python.util.install.InstallerException: Error accessing jar file
        at org.python.util.install.JarInfo.<init>(Unknown Source)
        at org.python.util.install.Installation.internalMain(Unknown Source)
        at org.python.util.install.Installation.main(Unknown Source)
Caused by: java.io.FileNotFoundException: E:\0 (Access is denied)
        at java.util.zip.ZipFile.open(Native Method)
        at java.util.zip.ZipFile.<init>(ZipFile.java:114)
        at java.util.jar.JarFile.<init>(JarFile.java:133)
        at java.util.jar.JarFile.<init>(JarFile.java:97)
        at org.python.util.install.JarInfo.readJarInfo(Unknown Source)
        ... 3 more

E:\0\!_out\jython>java -jar jython_installer-2.5b0.jar
org.python.util.install.InstallerException: Error accessing jar file
        at org.python.util.install.JarInfo.<init>(JarInfo.java:41)
        at
org.python.util.install.Installation.internalMain(Installation.java:3
31)
        at org.python.util.install.Installation.main(Installation.java:42)
Caused by: java.io.FileNotFoundException: E:\0 (Access is denied)
        at java.util.zip.ZipFile.open(Native Method)
        at java.util.zip.ZipFile.<init>(ZipFile.java:114)
        at java.util.jar.JarFile.<init>(JarFile.java:133)
        at java.util.jar.JarFile.<init>(JarFile.java:97)
        at org.python.util.install.JarInfo.readJarInfo(JarInfo.java:124)
        at org.python.util.install.JarInfo.<init>(JarInfo.java:39)
        ... 2 more

E:\0\!_out\jython>

The ! is used as jar file separator, such as:

jar:file:/E:/0/!_out/jython/jython_installer-2.2.1.jar!/org/python/util/install/JarInfo.class

the installer should search it from the end of the path, not from the
beginning.

The installer itself is easy to fix, but the additional problem is that 
the jdk methods 
  Class.getResourceAsStream()
and 
  ClassLoader.getResourceAsStream()
fail if there is a ! in the class path

At the moment this is only a guess, but if this turns out to be true it 
would be almost impossible to support Jython in a directory containing a 
n exclamation mark

http://jython.svn.sourceforge.net/viewvc/jython?view=rev&revision=5867 
fixes the installation part.

But as the attached TESTResource.java demonstrates, java itself has a 
problem delivering Class.getResourceAsStream() from inside a .jar file, 
if this .jar file is below a directory containing an exclamation mark.

Since we are making heavy usage of getResourceAsStream(), this means:
 - installer autotests cannot run
 - jython does not startup if installed into a directory containing a 
'!'

To reproduce the java problem mentioned above:
 - compile TESTResource.java
 - put the class file into test.jar, in package st.extreme.jython
 - add a text file my.resource into the same directory st/extreme/jython 
inside test.jar
 - copy test.jar into a directory containing a '!'
 - run the following java command:
java -classpath test.jar st.extreme.jython.TESTResource
 - and it will complain about a null resource stream

The getResourceAsStream() behaviour is not consistent over java versions
and platforms.
I need some more time to test a couple of combinations.

With http://jython.svn.sourceforge.net/viewvc/jython?
view=rev&revision=5946, installation of jython and starting jython from 
a directory containing an exclamation mark is now possible.

However, there are some restriction for running, mainly:
 - only on jdk 1.6 or higher
 - not on windows

Please find the details in the checkin comment of revision 5946.

I'll certainly still try to get jython.bat running for this special 
case, but with lower priority.

Since the solution involves JDK6 it can only go into 2.7.

With the work in msg4009 completed, sounds like this has been fixed with Jython 2.7's requirement of using Java 7

Resolving accordingly