Hi,
I find it is very hard to implement a GivenCharFilter(extends
TokenFilter)using incrementToken. My requirment is like this: I want to
analyze a StringReader("axb xxa xx c") to these token[term(startOffset,
endOffset, posIncre)]:
a(0,1,1) b(2,3,1) a(4,5,1) c(6,7,1).
First I use a WhiteSpaceFilter to filter the token, and then use
GivenCharFilter( assume filter "x" like above). the problem is: when call
incrementToken, I get attributeTerm "axb", but this time I need return two
attribute terms "a" and "b", but how to? because it just return only one
term.
Please help me.
My code just like this:
============================================
public class GivenCharFilter extends TokenFilter{
private char filterChar='x';
private TermAttribute termAtt;
private OffsetAttribute offsetAtt;
private PositionIncrementAttribute posIncrAtt;
public GivenCharFilter(){
init();
}
public void init() {
termAtt = (TermAttribute) addAttribute(TermAttribute.class);
offsetAtt = (OffsetAttribute) addAttribute(OffsetAttribute.class);
posIncrAtt = (PositionIncrementAttribute)
addAttribute(PositionIncrementAttribute.class);
}
/** Returns the next token in the stream, or null at EOS. */
public final boolean incrementToken() throws IOException {
//How To?
}
}
================================
Regards,
Xiaotao Deng
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