11 jul 2008 kl. 15.28 skrev jnance:
The TermFrequencyVector works perfectly for normal query strings.
But if I
add a wild card (*) onto words to search for different forms of the
word I
get an ArrayIndexOutOfBoundsException because the index is -1. Why
does this
happen? And is there anyway to avoid it?
It is because
public interface TermFreqVector {
/** Return an index in the term numbers array returned from
* <code>getTerms</code> at which the term with the specified
* <code>term</code> appears. If this term does not appear in the
array,
* return -1.
*/
public int indexOf(String term);
accepts a term text value and you try feed it with an unparsed query
string. The respose is negative as there is no term in the document
with the term text value 'foo*'.
One way to solve your problem is to enumerate the terms of the vector
and see if it.startsWith("foo");
You should probably explain what it is you try to achive by doing this.
karl
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