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From "Kevin Zhou (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-6034) [classlib] [luni] Should Improve File System Exception Messages
Date Fri, 05 Dec 2008 02:50:44 GMT
[classlib] [luni] Should Improve File System Exception Messages

                 Key: HARMONY-6034
                 URL: https://issues.apache.org/jira/browse/HARMONY-6034
             Project: Harmony
          Issue Type: Improvement
          Components: Classlib
    Affects Versions: 5.0M8
            Reporter: Kevin Zhou
             Fix For: 5.0M9

Given a test scenario [1] where "t:" is a mapped drive letter to which the current user only
has R+E access but doesn't have W acess.
Conduct this on RI [2] and HARMONY [3]. Obviously, RI return a FileNotFoundException with
a "Access is denied" message while HARMONY does not provide information as to why the file
is not found. This also occurs when the corresponding file doesn't exist, RI will throw FNF
with "system fails to find ...".

I think there is a difference in information returned that makes it a bit easier to understand
why the FNF Exception is occurring. 
Should we improve this?

    public static void main(String[] args) {
        try {
            File f = new File("t:/temp.file");
            if (f.exists()) {
                System.out.println("File " + f.getAbsolutePath() + " exists");
            FileOutputStream fos = new FileOutputStream(f);
            fos.write("Hello, World!".getBytes());
        } catch (FileNotFoundException fnfe) {
        } catch (Throwable t) {

[2] Output from a FileNotFoundException on RI:
java.io.FileNotFoundException: t:/temp.file (Access is denied)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:201)
at java.io.FileOutputStream.<init>(FileOutputStream.java:153)
at test.Main.main(Main.java:23)

[3] Output from a FileNotFoundException on HARMONY:
java.io.FileNotFoundException: t:/temp.file
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at test.Main.main(Main.java:23)

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