[HARMONY-68] java.nio.charset.Charset.isSupported(String charsetName) does not throw IllegalCharsetNameException for spoiled standard sharset name

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: Classlib
• Assignee: Unassigned
• Reporter: Svetlana Samoilenko
• Created: 02/Feb/06 12:52
• Updated: 05/Jul/06 03:44
• Resolved: 05/Jul/06 03:44

Description

According to j2se 1.4.2 specification for Charset.isSupported(String charsetName) the method must throw IllegalCharsetNameException "if the given charset name is illegal ".
"Legal charset name must begin with either a letter or a digit.
The test listed below shows that there is no the exception if to insert "-" or "_" symbols before standard sharset name, for example "-UTF-8" or "_US-ASCII".

Moreover the method returns "true" in this case.

BEA also does not throw the exception but returns "false".

Code to reproduce:
import java.nio.charset.*;

public class test2 {
public static void main (String[] args) {
// string starts neither a letter nor a digit
boolean sup=false;
try

{ sup=Charset.isSupported("-UTF-8"); System.out.println("***BAD. should be exception; sup="+sup); sup=Charset.isSupported("_US-ASCII"); System.out.println("***BAD. should be exception; sup="+sup); }

catch (IllegalCharsetNameException e)

{ System.out.println("***OK. Expected IllegalCharsetNameException " + e); }

}
}

Steps to Reproduce:
1. Build Harmony (check-out on 2006-01-30) j2se subset as described in README.txt.
2. Compile test2.java using BEA 1.4 javac
> javac -d . test2.java
3. Run java using compatible VM (J9)
> java -showversion test2

Output:
C:\tmp>C:\jrockit-j2sdk1.4.2_04\bin\java.exe -showversion test2
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)
***BAD. should be exception; sup=false
***BAD. should be exception; sup=false

C:\tmp>C:\harmony\trunk\deploy\jre\bin\java -showversion test2
(c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
***BAD. should be exception; sup=true
***BAD. should be exception; sup=true

Suggested junit test case:
------------------------ CharserTest.java -------------------------------------------------
import java.nio.charset.*;
import junit.framework.*;

public class CharsetTest extends TestCase {
public static void main(String[] args)

{ junit.textui.TestRunner.run(CharsetTest.class); }

public void test_isSupported() {
boolean sup=false;
// string starts neither a letter nor a digit
try

{ sup=Charset.isSupported("-UTF-8"); fail("***BAD. should be exception IllegalCharsetNameException"); }

catch (IllegalCharsetNameException e)

{ //expected }
// string starts neither a letter nor a digit
try{ sup=Charset.isSupported("_US-ASCII"); fail("***BAD. should be exception IllegalCharsetNameException"); } catch (IllegalCharsetNameException e) { //expected }

}
}