[HARMONY-6034] [classlib] [luni] Should Improve File System Exception Messages

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 5.0M8
• Fix Version/s: 5.0M9
• Component/s: Classlib
• Estimated Complexity: Moderate
• Assignee: Unassigned
• Reporter: Kevin Zhou
• Created: 05/Dec/08 02:50
• Updated: 10/Dec/08 08:06

Description

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?

[1]
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());
fos.close();
} catch (FileNotFoundException fnfe)

{ fnfe.printStackTrace(System.err); }

catch (Throwable t)

{ t.printStackTrace(System.err); }

}

[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)