org.apache.lucene.search.spans
Class SpanFirstQuery
- Cloneable, Serializable
public class SpanFirstQuery
Matches spans near the beginning of a field.
SpanFirstQuery(SpanQuery match, int end) - Construct a SpanFirstQuery matching spans in
match whose end
position is less than or equal to end .
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boolean | equals(Object o)
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void | extractTerms(Set terms) - Expert: adds all terms occuring in this query to the terms set.
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int | getEnd() - Return the maximum end position permitted in a match.
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String | getField() - Returns the name of the field matched by this query.
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SpanQuery | getMatch() - Return the SpanQuery whose matches are filtered.
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Spans | getSpans(IndexReader reader) - Expert: Returns the matches for this query in an index.
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Collection | getTerms() - use extractTerms instead
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int | hashCode()
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Query | rewrite(IndexReader reader) - Expert: called to re-write queries into primitive queries.
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String | toString(String field) - Prints a query to a string, with
field assumed to be the
default field and omitted.
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clone , combine , createWeight , extractTerms , getBoost , getSimilarity , mergeBooleanQueries , rewrite , setBoost , toString , toString , weight |
SpanFirstQuery
public SpanFirstQuery(SpanQuery match,
int end)
Construct a SpanFirstQuery matching spans in match
whose end
position is less than or equal to end
.
equals
public boolean equals(Object o)
extractTerms
public void extractTerms(Set terms)
Expert: adds all terms occuring in this query to the terms set. Only
works if this query is in its
rewritten
form.
- extractTerms in interface Query
getEnd
public int getEnd()
Return the maximum end position permitted in a match.
getField
public String getField()
Returns the name of the field matched by this query.
- getField in interface SpanQuery
getMatch
public SpanQuery getMatch()
Return the SpanQuery whose matches are filtered.
getSpans
public Spans getSpans(IndexReader reader)
throws IOException
Expert: Returns the matches for this query in an index. Used internally
to search for spans.
- getSpans in interface SpanQuery
getTerms
public Collection getTerms()
use extractTerms instead
Returns a collection of all terms matched by this query.
- getTerms in interface SpanQuery
hashCode
public int hashCode()
rewrite
public Query rewrite(IndexReader reader)
throws IOException
Expert: called to re-write queries into primitive queries. For example,
a PrefixQuery will be rewritten into a BooleanQuery that consists
of TermQuerys.
- rewrite in interface Query
toString
public String toString(String field)
Prints a query to a string, with
field
assumed to be the
default field and omitted.
The representation used is one that is supposed to be readable
by
QueryParser
. However,
there are the following limitations:
- If the query was created by the parser, the printed
representation may not be exactly what was parsed. For example,
characters that need to be escaped will be represented without
the required backslash.
- Some of the more complicated queries (e.g. span queries)
don't have a representation that can be parsed by QueryParser.
- toString in interface Query
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