Hi Julien,
Julien Nioche wrote:
> Thilo and Marshall,
>
> Thanks for sharing the tip. Indeed it would be a good idea to add this
> little example to the documentation.
>
> A quick comment about the Iterator methods. I had a problem with the
> following piece of code:
>
> /while (wordFormIterator.hasNext()){
> WordForm wf = (WordForm)wordFormIterator.next();
> if (wf.getBegin()==token.getBegin() && wf.getEnd()==token.getEnd()){
> liste.add(wf);
> }
> else {
> // move back
> wordFormIterator.moveToPrevious();
> return liste;
> }
> }
> /
> The last element of the iterator was never accessible because
> /hasNext()/ returned false despite the fact that there WAS an element
> left in there. /moveToPrevious /had been previously called on this iterator.
>
> Should not /hasNext() /return true even if the cursor has been moved
> forward or backward within the iterator? Or is the use of the legacy
> methods (hasNext(), next()) incompatible with the /moveTo* /methods?
hm, I thought this was in our documentation, but couldn't find it myself.
You should not mix the use of next()/hasNext() with the methods defined
in the FSIterator interface. They do not work well together. If you use
the FSIterator APIs, you should use them exclusively. Sorry about that.
I'll add a comment to the javadocs.
>
> Thanks
>
> Julien
>> To be a bit more explicit, here's some code that will determine how
>> many tokens the longest sentence in the document contains. It's a
>> silly example, but it illustrates the concept. Maybe this should go
>> in the docs. Note: I have not actually run this code, it may not
>> work immediately ;-)
>>
>> CAS cas = ...;
>> Type sentenceType = cas.getTypeSystem().getType("yourSentenceTypeName");
>> Type tokenType = cas.getTypeSystem().getType("yourTokenTypeName");
>> FSIterator sentenceIt = cas.getAnnotationIndex(sentenceType).iterator();
>> AnnotationIndex tokenIndex = cas.getAnnotationIndex(tokenType);
>> FSIterator tokenIt;
>> int maxLen = 0;
>> int currentLen;
>> for (sentenceIt.moveToFirst(); sentenceIt.isValid();
>> sentenceIt.moveToNext()) {
>> tokenIt = tokenIndex.subiterator((AnnotationFS) sentenceIt.get());
>> currentLen = 0;
>> for (tokenIt.moveToFirst(); tokenIt.isValid(); tokenIt.moveToNext()) {
>> ++currentLen;
>> }
>> maxLen = ((maxLen < currentLen) ? currentLen : maxLen);
>> }
>> System.out.println("Longest sentence contains " + maxLen + " tokens.");
>>
>> --Thilo
>>
>> Marshall Schor wrote:
>>
>>> Did you consider using subIterators? These are (briefly) described in
>>> section 4.7.4 of the Apache UIMA Reference book, and may include exactly
>>> what you're trying to get at - an interator over elements that are
>>> "contained" in the span of other elements.
>>>
>>> -Marshall
>>>
>>> Julien Nioche wrote:
>>>
>>>> Hi,
>>>>
>>>> Sorry if someone already asked the question.
>>>> Is there a direct way to obtain from a Cas all the annotations of a
>>>> given type located between two positions in the text? Something like
>>>> getContained(String type,int start,int end)?
>>>> I am trying to get all the Tokens contained within a specific
>>>> Sentence. I have used iterators for doing that and compared the offset
>>>> with those of the Sentence but it is a bit tedious. Have I missed
>>>> something obvious?
>>>>
>>>> Thanks
>>>>
>>>> Julien
>>>>
>>>>
>>>>
>
