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https://issues.apache.org/jira/browse/DERBY-3320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12579910#action_12579910
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Mamta A. Satoor commented on DERBY-3320:
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I spent some time on this jira entry and found that we get the Locale and
Collator for the database even before we know that we are dealing with a
territory based database. This happens in DataValueFactoryImpl.setLocale which
gets called by BasicDatabase.boot(). The reason we do this setting before the
store module and data dictionary module boots up is so that Collator info is
available to store if needs to do recovery. I am trying to tackle the problem
first for database create time only(will address subsequent boot times later
on). I will try to see if I can find the request for territory based database
during DataValueFactory module bootup so we can see if Collator is really
supported or not for the given locale.
> Database creation and boot should fail if collation=TERRITORY_BASED and the
> selected locale is not supported
> ------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-3320
> URL: https://issues.apache.org/jira/browse/DERBY-3320
> Project: Derby
> Issue Type: Bug
> Affects Versions: 10.4.0.0
> Environment: Java ME:
> Product: phoneME Advanced (phoneme_advanced_mr2-b34)
> Profile: Foundation Profile Specification 1.1
> Linux 2.4.21-40.ELsmp #1 SMP Thu Feb 2 22:14:12 EST 2006 i686 athlon i386
> GNU/Linux
> Reporter: Vemund Østgaard
> Assignee: Mamta A. Satoor
> Attachments: DERBY_3320_Repro.java
>
>
> A problem I've discovered when testing with the phoneME advanced platform is
> that the collationtests expect other locales than Locale.US to be available
> on the platform that is used for the test, and for phoneME advanced (when
> compiled as foundation profile) only Locale.US is available. From the jdk1.6
> javadoc of Collator.getAvailableLocales() I see that only Locale.US is
> strictly required:
> public static Locale[] getAvailableLocales()
> Returns an array of all locales for which the getInstance methods of this
> class can return localized instances. The returned array represents the union
> of locales supported by the Java runtime and by installed CollatorProvider
> implementations. It must contain at least a Locale instance equal to
> Locale.US.
> Returns:
> An array of locales for which localized Collator instances are
> available.
> This led me to thinking about how Derby should behave if created/booted with
> collation=TERRITORY_BASED and territory=<some unsupported locale>. I'm not
> sure what the consequences could be if the database is first created on a
> platform that supports whatever locale is set and later booted with one that
> doesn't, or created on a platform missing support and later booted with one
> that has. In any case I think it may confuse a user needlessly to see the
> database boot successfully with his collation setting and later behave in a
> way he does not expect.
> Opinions voiced on the derby-dev list are that both database creation and
> boot should fail if collation=TERRITORY_BASED and the selected locale is not
> supported.
> If a change like this is implemented, the collationtests should be changed to
> verify correct behavior also if they are executed in an environment were some
> of the tested locales are not supported.
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