org.activemath.omdocjdom.index.queries
Class SpanQuerySegmenter

java.lang.Object
  org.activemath.omdocjdom.index.queries.SpanQuerySegmenter

public class SpanQuerySegmenter
extends Object

Process to split a token-stream with non-zero slop into a composition of SpanQuery objects. See computeSpanQuery(org.apache.lucene.analysis.TokenStream).

Constructor Summary

SpanQuerySegmenter(String fieldName)

Method Summary

org.apache.lucene.search.spans.SpanQuery	computeSpanQuery(org.apache.lucene.analysis.TokenStream tokS) Runs through the list of tokens and makes an appropriate SpanQuery out of it.
static void	decomposeSQtoXML(org.apache.lucene.search.Query sq, Writer out)
static void	main(String[] args)
static void	setMaxTermDepth(int depth)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SpanQuerySegmenter

public SpanQuerySegmenter(String fieldName)

Method Detail

setMaxTermDepth

public static void setMaxTermDepth(int depth)

computeSpanQuery

public org.apache.lucene.search.spans.SpanQuery computeSpanQuery(org.apache.lucene.analysis.TokenStream tokS)

Runs through the list of tokens and makes an appropriate SpanQuery out of it. This converts a variable of name "?", when in surroundig, to a query that matches any sub-term (see source for a detailed approach). It converts all other tokens to SpanTermQuery embedded in the sequence.
There is no way, currently, to match a series of terms, or a term which contains, possibly very deep, something else.

main

public static void main(String[] args)

decomposeSQtoXML

public static void decomposeSQtoXML(org.apache.lucene.search.Query sq,
                                    Writer out)