org.apache.lucene.search.spans
Class SpanNotQuery

java.lang.Object
  extended by org.apache.lucene.search.Query
      extended by org.apache.lucene.search.spans.SpanQuery
          extended by org.apache.lucene.search.spans.SpanNotQuery
All Implemented Interfaces:
Cloneable

public class SpanNotQuery
extends SpanQuery
implements Cloneable

Removes matches which overlap with another SpanQuery or within a x tokens before or y tokens after another SpanQuery.


Constructor Summary
SpanNotQuery(SpanQuery include, SpanQuery exclude)
          Construct a SpanNotQuery matching spans from include which have no overlap with spans from exclude.
SpanNotQuery(SpanQuery include, SpanQuery exclude, int dist)
          Construct a SpanNotQuery matching spans from include which have no overlap with spans from exclude within dist tokens of include.
SpanNotQuery(SpanQuery include, SpanQuery exclude, int pre, int post)
          Construct a SpanNotQuery matching spans from include which have no overlap with spans from exclude within pre tokens before or post tokens of include.
 
Method Summary
 SpanNotQuery clone()
          Returns a clone of this query.
 boolean equals(Object o)
          Returns true iff o is equal to this.
 void extractTerms(Set<Term> terms)
          Expert: adds all terms occurring in this query to the terms set.
 SpanQuery getExclude()
          Return the SpanQuery whose matches must not overlap those returned.
 String getField()
          Returns the name of the field matched by this query.
 SpanQuery getInclude()
          Return the SpanQuery whose matches are filtered.
 Spans getSpans(AtomicReaderContext context, Bits acceptDocs, Map<Term,TermContext> termContexts)
          Expert: Returns the matches for this query in an index.
 int hashCode()
           
 Query rewrite(IndexReader reader)
          Expert: called to re-write queries into primitive queries.
 String toString(String field)
          Prints a query to a string, with field assumed to be the default field and omitted.
 
Methods inherited from class org.apache.lucene.search.spans.SpanQuery
createWeight
 
Methods inherited from class org.apache.lucene.search.Query
getBoost, setBoost, toString
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

SpanNotQuery

public SpanNotQuery(SpanQuery include,
                    SpanQuery exclude)
Construct a SpanNotQuery matching spans from include which have no overlap with spans from exclude.


SpanNotQuery

public SpanNotQuery(SpanQuery include,
                    SpanQuery exclude,
                    int dist)
Construct a SpanNotQuery matching spans from include which have no overlap with spans from exclude within dist tokens of include.


SpanNotQuery

public SpanNotQuery(SpanQuery include,
                    SpanQuery exclude,
                    int pre,
                    int post)
Construct a SpanNotQuery matching spans from include which have no overlap with spans from exclude within pre tokens before or post tokens of include.

Method Detail

getInclude

public SpanQuery getInclude()
Return the SpanQuery whose matches are filtered.


getExclude

public SpanQuery getExclude()
Return the SpanQuery whose matches must not overlap those returned.


getField

public String getField()
Description copied from class: SpanQuery
Returns the name of the field matched by this query.

Specified by:
getField in class SpanQuery

extractTerms

public void extractTerms(Set<Term> terms)
Description copied from class: Query
Expert: adds all terms occurring in this query to the terms set. Only works if this query is in its rewritten form.

Overrides:
extractTerms in class Query

toString

public String toString(String field)
Description copied from class: Query
Prints a query to a string, with field assumed to be the default field and omitted.

Specified by:
toString in class Query

clone

public SpanNotQuery clone()
Description copied from class: Query
Returns a clone of this query.

Overrides:
clone in class Query

getSpans

public Spans getSpans(AtomicReaderContext context,
                      Bits acceptDocs,
                      Map<Term,TermContext> termContexts)
               throws IOException
Description copied from class: SpanQuery
Expert: Returns the matches for this query in an index. Used internally to search for spans.

Specified by:
getSpans in class SpanQuery
Throws:
IOException

rewrite

public Query rewrite(IndexReader reader)
              throws IOException
Description copied from class: Query
Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.

Overrides:
rewrite in class Query
Throws:
IOException

equals

public boolean equals(Object o)
Returns true iff o is equal to this.

Overrides:
equals in class Query

hashCode

public int hashCode()
Overrides:
hashCode in class Query


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