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Posted to commits@harmony.apache.org by "nikolay (JIRA)" <ji...@apache.org> on 2006/04/05 13:02:46 UTC
[jira] Created: (HARMONY-311) java.io.FileInputStream.skip(long n)
returns incorrect value
java.io.FileInputStream.skip(long n) returns incorrect value
------------------------------------------------------------
Key: HARMONY-311
URL: http://issues.apache.org/jira/browse/HARMONY-311
Project: Harmony
Type: Bug
Components: Classlib
Reporter: nikolay
According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
the method should return the actual number of bytes skipped.
The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
import java.io.FileInputStream;
import java.io.IOException;
import java.io.File;
public class Test{
public static void main(String[] args) {
FileInputStream toRet = null;
try {
File file = new File("FileInStream.tmp");
file.createNewFile();
toRet = new FileInputStream(file);
System.out.println("skipped = " + toRet.skip(100));
} catch (IOException e) {
e.printStackTrace();
}
}
}
Output RI:
java.exe -showversion Test
java version "1.4.2_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
Native Threads, GC strategy: parallel)
skipped = 0
Output harmony:
java -showversion Test
java version 1.4.2 (subset)
(c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
skipped = 100
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[jira] Updated: (HARMONY-311) java.io.FileInputStream.skip(long n)
returns incorrect value
Posted by "nikolay (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HARMONY-311?page=all ]
nikolay updated HARMONY-311:
----------------------------
Attachment: patch.txt
> java.io.FileInputStream.skip(long n) returns incorrect value
> ------------------------------------------------------------
>
> Key: HARMONY-311
> URL: http://issues.apache.org/jira/browse/HARMONY-311
> Project: Harmony
> Type: Bug
> Components: Classlib
> Reporter: nikolay
> Attachments: patch.txt
>
> According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
> the method should return the actual number of bytes skipped.
> The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.File;
> public class Test{
> public static void main(String[] args) {
> FileInputStream toRet = null;
> try {
> File file = new File("FileInStream.tmp");
> file.createNewFile();
> toRet = new FileInputStream(file);
> System.out.println("skipped = " + toRet.skip(100));
> } catch (IOException e) {
> e.printStackTrace();
> }
> }
> }
> Output RI:
> java.exe -showversion Test
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
> Native Threads, GC strategy: parallel)
> skipped = 0
> Output harmony:
> java -showversion Test
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
> skipped = 100
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[jira] Commented: (HARMONY-311) java.io.FileInputStream.skip(long
n) returns incorrect value
Posted by "George Harley (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HARMONY-311?page=comments#action_12373351 ]
George Harley commented on HARMONY-311:
---------------------------------------
Hi Nicolay,
I converted your test into a JUnit test case and found that the Harmony behaviour is consistent with both the Sun 1.4.2 and Sun 5.0 releases.
Best regards,
George
> java.io.FileInputStream.skip(long n) returns incorrect value
> ------------------------------------------------------------
>
> Key: HARMONY-311
> URL: http://issues.apache.org/jira/browse/HARMONY-311
> Project: Harmony
> Type: Bug
> Components: Classlib
> Reporter: nikolay
> Assignee: George Harley
> Attachments: patch.txt
>
> According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
> the method should return the actual number of bytes skipped.
> The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.File;
> public class Test{
> public static void main(String[] args) {
> FileInputStream toRet = null;
> try {
> File file = new File("FileInStream.tmp");
> file.createNewFile();
> toRet = new FileInputStream(file);
> System.out.println("skipped = " + toRet.skip(100));
> } catch (IOException e) {
> e.printStackTrace();
> }
> }
> }
> Output RI:
> java.exe -showversion Test
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
> Native Threads, GC strategy: parallel)
> skipped = 0
> Output harmony:
> java -showversion Test
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
> skipped = 100
--
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[jira] Commented: (HARMONY-311) java.io.FileInputStream.skip(long
n) returns incorrect value
Posted by "nikolay (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HARMONY-311?page=comments#action_12373459 ]
nikolay commented on HARMONY-311:
---------------------------------
Hi George,
you are right, Harmony behaviour is consistent with both the Sun 1.4.2 and Sun 5.0 releases, but doesn't consistent with specification. I suppose RI shows behavior complied with specification.
Thanks,
Nikolay
> java.io.FileInputStream.skip(long n) returns incorrect value
> ------------------------------------------------------------
>
> Key: HARMONY-311
> URL: http://issues.apache.org/jira/browse/HARMONY-311
> Project: Harmony
> Type: Bug
> Components: Classlib
> Reporter: nikolay
> Assignee: George Harley
> Attachments: patch.txt
>
> According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
> the method should return the actual number of bytes skipped.
> The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.File;
> public class Test{
> public static void main(String[] args) {
> FileInputStream toRet = null;
> try {
> File file = new File("FileInStream.tmp");
> file.createNewFile();
> toRet = new FileInputStream(file);
> System.out.println("skipped = " + toRet.skip(100));
> } catch (IOException e) {
> e.printStackTrace();
> }
> }
> }
> Output RI:
> java.exe -showversion Test
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
> Native Threads, GC strategy: parallel)
> skipped = 0
> Output harmony:
> java -showversion Test
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
> skipped = 100
--
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[jira] Commented: (HARMONY-311) java.io.FileInputStream.skip(long
n) returns incorrect value
Posted by "nikolay (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HARMONY-311?page=comments#action_12373568 ]
nikolay commented on HARMONY-311:
---------------------------------
Hi George,
I agree with the resolution, please close this issue.
Thanks,
Nikolay
> java.io.FileInputStream.skip(long n) returns incorrect value
> ------------------------------------------------------------
>
> Key: HARMONY-311
> URL: http://issues.apache.org/jira/browse/HARMONY-311
> Project: Harmony
> Type: Bug
> Components: Classlib
> Reporter: nikolay
> Assignee: George Harley
> Attachments: patch.txt
>
> According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
> the method should return the actual number of bytes skipped.
> The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.File;
> public class Test{
> public static void main(String[] args) {
> FileInputStream toRet = null;
> try {
> File file = new File("FileInStream.tmp");
> file.createNewFile();
> toRet = new FileInputStream(file);
> System.out.println("skipped = " + toRet.skip(100));
> } catch (IOException e) {
> e.printStackTrace();
> }
> }
> }
> Output RI:
> java.exe -showversion Test
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
> Native Threads, GC strategy: parallel)
> skipped = 0
> Output harmony:
> java -showversion Test
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
> skipped = 100
--
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Re: Bug for bug compatibility (was Re: [jira] Closed: (HARMONY-311)
java.io.FileInputStream.skip(long n) returns incorrect value)
Posted by Geir Magnusson Jr <ge...@pobox.com>.
George Harley wrote:
> Hi,
>
> Would it be possible to have a resolution option of "Matching RI Bug"
> (or similar) when closing a JIRA issue with the resolution that we are
> matching an apparent RI bug ? Hopefully, it should make it easier to
> find all such issues in the future.
Well.... one bug in JIRA's design is that resolutions are global. So we
could add it, but then every other project at Apache gets that on the
resolution pick-list.
The other problem I see is that it's orthogonal information, of sorts...
I mean, what if someone was reporting a bug, and we decide to call it
'matching'? or if you make a change to align w/ the RI, that's
'matching' too, but the diff is that one is "won't fix" and one is "fixed".
How about re-visiting the JIRA category idea - we change the current
"Non-bug differences from RI" category to also include "Matching Bugs"
(which is "difference from spec" among other things..."
So maybe "differences from RI or spec" category? or "RI and spec diffs
and bugs"?
geir
>
> Best regards,
> George
>
>
> George Harley (JIRA) wrote:
>> [ http://issues.apache.org/jira/browse/HARMONY-311?page=all ]
>> George Harley closed HARMONY-311:
>> ---------------------------------
>>
>> Resolution: Won't Fix
>>
>> This is a case of Harmony matching the behaviour of an apparent RI bug.
>>
>>
>>> java.io.FileInputStream.skip(long n) returns incorrect value
>>> ------------------------------------------------------------
>>>
>>> Key: HARMONY-311
>>> URL: http://issues.apache.org/jira/browse/HARMONY-311
>>> Project: Harmony
>>> Type: Bug
>>>
>>
>>
>>> Components: Classlib
>>> Reporter: nikolay
>>> Assignee: George Harley
>>> Attachments: patch.txt
>>>
>>> According to J2SE 1.4.2, 1.5.0 specifications for
>>> java.io.FileInputStream.skip(long n)
>>> the method should return the actual number of bytes skipped.
>>> The test listed below shows that the method returns incorrect value
>>> if parameter > number of bytes in file.
>>> import java.io.FileInputStream; import java.io.IOException; import
>>> java.io.File; public class Test{ public static void main(String[]
>>> args) { FileInputStream toRet = null; try {
>>> File file = new File("FileInStream.tmp");
>>> file.createNewFile(); toRet = new FileInputStream(file);
>>> System.out.println("skipped = " + toRet.skip(100));
>>> } catch (IOException e) { e.printStackTrace();
>>> } } } Output RI: java.exe -showversion Test java
>>> version "1.4.2_04"
>>> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
>>> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build
>>> ari-31788-20040616-1132-win-ia32,
>>> Native Threads, GC strategy: parallel)
>>> skipped = 0
>>> Output harmony:
>>> java -showversion Test java version 1.4.2 (subset)
>>> (c) Copyright 1991, 2005 The Apache Software Foundation or its
>>> licensors, as applicable.
>>> skipped = 100
>>
>>
>
>
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> To unsubscribe, e-mail: harmony-dev-unsubscribe@incubator.apache.org
> For additional commands, e-mail: harmony-dev-help@incubator.apache.org
>
>
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Bug for bug compatibility (was Re: [jira] Closed: (HARMONY-311) java.io.FileInputStream.skip(long
n) returns incorrect value)
Posted by George Harley <ge...@googlemail.com>.
Hi,
Would it be possible to have a resolution option of "Matching RI Bug"
(or similar) when closing a JIRA issue with the resolution that we are
matching an apparent RI bug ? Hopefully, it should make it easier to
find all such issues in the future.
Best regards,
George
George Harley (JIRA) wrote:
> [ http://issues.apache.org/jira/browse/HARMONY-311?page=all ]
>
> George Harley closed HARMONY-311:
> ---------------------------------
>
> Resolution: Won't Fix
>
> This is a case of Harmony matching the behaviour of an apparent RI bug.
>
>
>> java.io.FileInputStream.skip(long n) returns incorrect value
>> ------------------------------------------------------------
>>
>> Key: HARMONY-311
>> URL: http://issues.apache.org/jira/browse/HARMONY-311
>> Project: Harmony
>> Type: Bug
>>
>
>
>> Components: Classlib
>> Reporter: nikolay
>> Assignee: George Harley
>> Attachments: patch.txt
>>
>> According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
>> the method should return the actual number of bytes skipped.
>> The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
>> import java.io.FileInputStream;
>> import java.io.IOException;
>> import java.io.File;
>> public class Test{
>> public static void main(String[] args) {
>> FileInputStream toRet = null;
>> try {
>> File file = new File("FileInStream.tmp");
>> file.createNewFile();
>> toRet = new FileInputStream(file);
>> System.out.println("skipped = " + toRet.skip(100));
>> } catch (IOException e) {
>> e.printStackTrace();
>> }
>> }
>> }
>> Output RI:
>> java.exe -showversion Test
>> java version "1.4.2_04"
>> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
>> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
>> Native Threads, GC strategy: parallel)
>> skipped = 0
>> Output harmony:
>> java -showversion Test
>> java version 1.4.2 (subset)
>> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
>> skipped = 100
>>
>
>
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[jira] Closed: (HARMONY-311) java.io.FileInputStream.skip(long n)
returns incorrect value
Posted by "George Harley (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HARMONY-311?page=all ]
George Harley closed HARMONY-311:
---------------------------------
Resolution: Won't Fix
This is a case of Harmony matching the behaviour of an apparent RI bug.
> java.io.FileInputStream.skip(long n) returns incorrect value
> ------------------------------------------------------------
>
> Key: HARMONY-311
> URL: http://issues.apache.org/jira/browse/HARMONY-311
> Project: Harmony
> Type: Bug
> Components: Classlib
> Reporter: nikolay
> Assignee: George Harley
> Attachments: patch.txt
>
> According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
> the method should return the actual number of bytes skipped.
> The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.File;
> public class Test{
> public static void main(String[] args) {
> FileInputStream toRet = null;
> try {
> File file = new File("FileInStream.tmp");
> file.createNewFile();
> toRet = new FileInputStream(file);
> System.out.println("skipped = " + toRet.skip(100));
> } catch (IOException e) {
> e.printStackTrace();
> }
> }
> }
> Output RI:
> java.exe -showversion Test
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
> Native Threads, GC strategy: parallel)
> skipped = 0
> Output harmony:
> java -showversion Test
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
> skipped = 100
--
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[jira] Assigned: (HARMONY-311) java.io.FileInputStream.skip(long n)
returns incorrect value
Posted by "George Harley (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HARMONY-311?page=all ]
George Harley reassigned HARMONY-311:
-------------------------------------
Assign To: George Harley
> java.io.FileInputStream.skip(long n) returns incorrect value
> ------------------------------------------------------------
>
> Key: HARMONY-311
> URL: http://issues.apache.org/jira/browse/HARMONY-311
> Project: Harmony
> Type: Bug
> Components: Classlib
> Reporter: nikolay
> Assignee: George Harley
> Attachments: patch.txt
>
> According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
> the method should return the actual number of bytes skipped.
> The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.File;
> public class Test{
> public static void main(String[] args) {
> FileInputStream toRet = null;
> try {
> File file = new File("FileInStream.tmp");
> file.createNewFile();
> toRet = new FileInputStream(file);
> System.out.println("skipped = " + toRet.skip(100));
> } catch (IOException e) {
> e.printStackTrace();
> }
> }
> }
> Output RI:
> java.exe -showversion Test
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
> Native Threads, GC strategy: parallel)
> skipped = 0
> Output harmony:
> java -showversion Test
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
> skipped = 100
--
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[jira] Commented: (HARMONY-311) java.io.FileInputStream.skip(long
n) returns incorrect value
Posted by "George Harley (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HARMONY-311?page=comments#action_12373504 ]
George Harley commented on HARMONY-311:
---------------------------------------
Hi Nikolay,
I agree with you that the behaviour shared by Harmony and the RI does seem to be at odds with the specification. In cases like this the community consensus was that we match the RI behaviour but log that we are doing so in the JIRA [1].
With this in mind, are you happy for this issue to be closed ?
Best regards,
George
[1] http://mail-archives.apache.org/mod_mbox/incubator-harmony-dev/200602.mbox/%3c44041D40.9070804@gmail.com%3e
> java.io.FileInputStream.skip(long n) returns incorrect value
> ------------------------------------------------------------
>
> Key: HARMONY-311
> URL: http://issues.apache.org/jira/browse/HARMONY-311
> Project: Harmony
> Type: Bug
> Components: Classlib
> Reporter: nikolay
> Assignee: George Harley
> Attachments: patch.txt
>
> According to J2SE 1.4.2, 1.5.0 specifications for java.io.FileInputStream.skip(long n)
> the method should return the actual number of bytes skipped.
> The test listed below shows that the method returns incorrect value if parameter > number of bytes in file.
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.File;
> public class Test{
> public static void main(String[] args) {
> FileInputStream toRet = null;
> try {
> File file = new File("FileInStream.tmp");
> file.createNewFile();
> toRet = new FileInputStream(file);
> System.out.println("skipped = " + toRet.skip(100));
> } catch (IOException e) {
> e.printStackTrace();
> }
> }
> }
> Output RI:
> java.exe -showversion Test
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
> Native Threads, GC strategy: parallel)
> skipped = 0
> Output harmony:
> java -showversion Test
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
> skipped = 100
--
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