org.crosswire.jsword.index.lucene
Class LuceneQueryBuilder

java.lang.Object
  org.crosswire.jsword.index.lucene.LuceneQueryBuilder

All Implemented Interfaces:

QueryBuilder

public final class LuceneQueryBuilder
extends Object
implements QueryBuilder

A query can have a optional range specifier and an optional blur specifier. The range specifier can be +[range], -[range] or just [range]. This must stand at the beginning of the query and may be surrounded by whitespace. The blur specifier is either ~ or ~n, where ~ means adjacent verses, but ~n means to blur by n verses.

Author:

DM Smith

See Also:

The GNU Lesser General Public License for details.

Field Summary

private static Pattern	BLUR_PATTERN The pattern of a blur.
private static Query	NULL_QUERY A query that returns nothing.
private static Pattern	RANGE_PATTERN The pattern of a range.

Constructor Summary

LuceneQueryBuilder()

Method Summary

Query

parse(String aSearch) Construct a query from a string.

Methods inherited from class java.lang.Object

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

Field Detail

RANGE_PATTERN

private static final Pattern RANGE_PATTERN

The pattern of a range. This is anything that is contained between a leading [] (but not containing a [ or ]), with a + or - optional prefix, perhaps surrounded by whitespace.

BLUR_PATTERN

private static final Pattern BLUR_PATTERN

The pattern of a blur. A '~', optionally followed by a number, representing the number of verses.

NULL_QUERY

private static final Query NULL_QUERY

A query that returns nothing.

Constructor Detail

LuceneQueryBuilder

public LuceneQueryBuilder()

Method Detail

parse

public Query parse(String aSearch)

Description copied from interface: QueryBuilder

Construct a query from a string.

Specified by:

parse in interface QueryBuilder

Parameters:

aSearch - The text to convert

Returns:

a query.