[jsword-devel] Bookset
Chris Burrell
chris at burrell.me.uk
Wed Jan 29 14:32:25 MST 2014
Hi
That's correct, but what happens if the verse 0 is actually unmapped? i.e.
a mapping has not been specified in the file, or it was ignored as part of
mapping a range? At the time of the map() / unmap() method, it's too late
to distinguish between the two cases.
In the first instance, we should assume same ref, but in the second it may
be in the middle of another range. So the fix suggested before may work
(i.e. map verse 0 together with verse 1 when found as part of a range.).
Chris
On 29 January 2014 20:59, Martin Denham <mjdenham at gmail.com> wrote:
> I think you have hit on the issue: And Bible maps a single verse and
> allows the context to determine the passage displayed, whereas the JSword
> v11n mapping code assumes a Passage range is mapped.
>
> I can imagine places where mapping a Passage would be better in And Bible
> and may use it in the future e.g. the Verse > Compare Translation screen,
> but I think that mapping the current verse works well for generally moving
> around in Bibles and keeping them in sync.
>
> There may be a simple solution to this. The external interface to the
> v11n mapping has 2 public methods:
> public Passage map(final Passage key, final Versification target)
> public Key mapVerse(Verse v, Versification targetVersification)
>
> So we can derive the intention of the calling code from the method that is
> called - Verse or Passage.
> Then if mapVerse() is called then it is clear that verse 0 should be
> mapped, but if map() is called then verse 0 should not be mapped.
> So the check in the code for zerosUnmapped would become zerosUnmapped &&
> !mapVerseFunctionCalled.
>
> Martin
>
>
> On 29 January 2014 20:30, Chris Burrell <chris at burrell.me.uk> wrote:
>
>> OK - I think I see our issue, and it's in the difference of approach. We
>> are using the versification system in different ways. You're using a single
>> verse map to work out where something is, but we're mapping a whole range.
>> A verse '0' in the mapping files means pre-verse 1, and there was some
>> confusion on my part when I developed it in May. I had assumed that verse 0
>> in a chapter was actually the pre-verse content.
>>
>> So consider the following mapping in the Leningrad.properties.
>>
>> Ps.3.1-9=Ps.3.0-8
>>
>> The zero-unmapped is specified because there is no pre-verse content.
>> That is, in my May-understanding of the issue, there wasn't a verse 0.
>>
>> The reason you are experiencing the issue is that you're converting a
>> single verse. If you were to convert the whole chapter, then you'd end up
>> with the correct range.
>>
>> In this case, allowing "verse 0" means that if we would be indicating
>> that we have a pre-verse content in the Leningrad versification, which can
>> be mapped to the KJV versification. In terms of the original
>> implementation, it is true that Leningrad does not have pre-verse content.
>> So it makes sense (to me at least) that we are getting a zero passage back.
>>
>> However, because verse 0 doesn't indicate a pre-verse content. I think we
>> need to do something different. I don't think we can simply return the same
>> verse in the different versification, as in the case of verse ranges like:
>>
>> Job.40.25-41.26=Job.41.1-34
>>
>> this would not work. Job 40.25-end has 8 verses. So the range
>> Job.40.25-Job.41.26 has 34 verses. (i.e. verse 0 is left unmapped)
>>
>> There is specific code to ensure that these mappings are skipped, such
>> that the range mentioned above works:
>>
>> if (isKJVMany) {
>> //we detect if the keys are 1-apart from each other. If so,
>> then we skip verse 0 on both sides.
>> int diff = Math.abs(leftHand.getKey().getCardinality() -
>> kjvVerses.getKey().getCardinality());
>>
>> if(diff > 1) {
>> reportCardinalityError(leftHand, kjvVerses);
>> }
>> skipVerse0 = diff == 1;
>> }
>>
>>
>> So, I'm not sure what the solution is, but I've hopefully given all of us
>> some information to think about it.
>>
>> One solution, is that instead of 'skipping' the verse 0 during range
>> iterations, we could map it to the next verse in the range. That would be
>> fairly reflective of how things really should be. We'd have to test this
>> carefully in terms of the OSIS iterator.
>>
>> Chris
>>
>>
>>
>> Chris
>>
>>
>>
>> On 26 January 2014 00:15, Martin Denham <mjdenham at gmail.com> wrote:
>>
>>> This seems wrong "the purpose of the flag is to return an empty key if
>>> you specifically ask for Verse 0".
>>>
>>> If a user is currently in Ex 20:0 in GerNeUe and switches to KJV you
>>> would expect to go to KJV 20:0 but he is left at EmptyKey??
>>> For comparison, if a user is currently in Ex 20:0 in ESV and switches
>>> to KJV he does actually go to KJV 20:0 (Not EmptyKey - because it is the
>>> same versification and the mapping returns v0 if it is the same v11n).
>>>
>>> The fact that RangedPassage throws an exception and Rocket does not may
>>> be just a matter of the specification of Passage not being tight enough -
>>> what to do with an empty passage.
>>>
>>> For AB verse 0 needs to be mapped.
>>>
>>> Martin
>>>
>>>
>>>
>>>
>>>
>>>
>>> On 25 January 2014 23:34, Chris Burrell <chris at burrell.me.uk> wrote:
>>>
>>>> Thanks Martin. I'd be in favour of removing the lookup by name (but not
>>>> essential for your release).
>>>>
>>>> Now that the build is stable, it would be a good time to label it (with
>>>> the 3 extra pull requests) and you could take your cut? BTW, I label the
>>>> JSword build in my repo when I release STEP.
>>>>
>>>> In terms of the zero unmapped option, it sounds like a bug in the
>>>> Passage type if it works with some Passages and not others. Would you agree
>>>> DM/Martin? They should either all fail or none of them, but not some and
>>>> some not. Basically, the purpose of the flag is to return an empty key if
>>>> you specifically ask for Verse 0, or if it happens to be asked for as part
>>>> of a range map-request. For most of the time, you don't want that to map to
>>>> any particular verse. We introduced it for some reason (can't quite
>>>> remember why) but was to do with being able to map some sections to
>>>> pre-verse content, as in the Psalms, whilst leaving all other verses (in
>>>> other books for example) as is.
>>>>
>>>> Chris
>>>>
>>>>
>>>>
>>>> On 25 January 2014 23:23, Martin Denham <mjdenham at gmail.com> wrote:
>>>>
>>>>> And Bible tends to get lists of books and then store the relevant Book
>>>>> object. I can't find anywhere that it asks for a book by name but it does
>>>>> use initials sometimes.
>>>>>
>>>>> I recall there was a problem a few months ago in which KJVA had the
>>>>> same name as KJV but different initials and use of the name as the id,
>>>>> instead of the initials, caused problems - a fix had to be implemented
>>>>> then. There were some similar cases of same name/different initials in the
>>>>> IBT repo.
>>>>>
>>>>> AB should be fine/faster if JSword matches by initials first rather
>>>>> than name - if that is what you are intending.
>>>>>
>>>>> I am hoping to settle on a stable build of JSword soon to prepare for
>>>>> an AB release. When do you think would be a good time. It would be good
>>>>> to get it labelled too. The only outstanding issue is with 'zerosUnmapped'
>>>>> but I could just remove that line from the properties files for AB if a fix
>>>>> is not easy. Currently I just catch the exception and force the verse to
>>>>> the required v11n.
>>>>>
>>>>> Martin
>>>>>
>>>>> Martin
>>>>>
>>>>>
>>>>>
>>>>> On 25 January 2014 21:41, Chris Burrell <chris at burrell.me.uk> wrote:
>>>>>
>>>>>> Hi
>>>>>>
>>>>>> I'm looking to refactor Books.installed().getBook(name) because it
>>>>>> takes too long when you need to look up books multiple times (and don't
>>>>>> have an easy way of caching the JSword lookup). It's particular slow when
>>>>>> you have 200+ resources (our server will have). This will also be more
>>>>>> prevalent in Android where method calls are quite expensive.
>>>>>>
>>>>>> In STEP we always have the initials of the module (the user selects
>>>>>> by name/initials/STEP name in the browser, where it always gets translated
>>>>>> to initials well before it hits JSword). Do any other frontends use the
>>>>>> getBook(name) by name?
>>>>>>
>>>>>> I want to at least provide way of getting the book directly from its
>>>>>> initials. As part of this, we can several things:
>>>>>>
>>>>>> In Books:
>>>>>> - refactor the getBook() method to not search first against the name,
>>>>>> then against name insensitive and then against the initials in the BMD, and
>>>>>> then against the initials directly
>>>>>> - If the above is not possible then at least provide a
>>>>>> getBookByInitials (which would just look up the initials against their
>>>>>> lower case value.
>>>>>>
>>>>>> In BookSet:
>>>>>> - I can't work out why we're sorting the inserts in add(). They cause
>>>>>> unecessary copies of the ArrayList contents in the creation of it.
>>>>>> - I can't work out why it also implements Set. Especially, since
>>>>>> contains would be a good candidate for using
>>>>>>
>>>>>>
>>>>>> So there are two options really:
>>>>>> - change BookSet to be based on a Map. getBooksByInitials would use
>>>>>> the map directly. getBook would iterate through the contents (or key the
>>>>>> contents in a separate map for faster access)
>>>>>> - Add a map to BookSet to cache the lookups
>>>>>>
>>>>>> My preference would be to replace the BookSet implementation
>>>>>> altogether. But the easy option would be to have a Map lookup. Do we use
>>>>>> any of the Set<> methods? Would it make sense to replace BookSet with a
>>>>>> LinkedHashMap?
>>>>>>
>>>>>>
>>>>>> Chris
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>> jsword-devel at crosswire.org
>>>>>> http://www.crosswire.org/mailman/listinfo/jsword-devel
>>>>>>
>>>>>>
>>>>>
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>>>>>
>>>>
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>>>>
>>>
>>
>
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