Module org.apache.derby.optionaltools

Package org.apache.derby.optional.api

Class LuceneUtils

java.lang.Object

org.apache.derby.optional.api.LuceneUtils

public abstract class LuceneUtils
extends Object

Utility methods for the Lucene optional tool.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LuceneUtils.DefaultIndexDescriptor	The default LuceneIndexDescriptor

Field Summary

Fields

Modifier and Type	Field	Description
static final String	TEXT_FIELD_NAME

Constructor Summary

Constructors

Constructor	Description
LuceneUtils()

Method Summary

Modifier and Type	Method	Description
static org.apache.lucene.util.Version	currentVersion()	Get the version of the Lucene library on the classpath.
static org.apache.lucene.analysis.Analyzer	defaultAnalyzer()	Get the default Analyzer associated with the database Locale.
static LuceneIndexDescriptor	defaultIndexDescriptor()	Get the default index descriptor.
static org.apache.lucene.queryparser.classic.QueryParser	defaultQueryParser(org.apache.lucene.util.Version version, String[] fieldNames, org.apache.lucene.analysis.Analyzer analyzer)	Get the default, classic QueryParser.
static org.apache.lucene.analysis.Analyzer	getAnalyzerForLocale(Locale locale)	Get the Analyzer associated with the given Locale.
static org.apache.lucene.analysis.Analyzer	standardAnalyzer()	Get the StandardAnalyzer for parsing text.

Methods inherited from class java.lang.Object

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

Field Details

TEXT_FIELD_NAME

public static final String TEXT_FIELD_NAME

See Also:

• Constant Field Values

Constructor Details

LuceneUtils

public LuceneUtils()

Method Details

currentVersion

public static org.apache.lucene.util.Version currentVersion()

Get the version of the Lucene library on the classpath.

Returns:

the version of the Lucene library

defaultAnalyzer

public static org.apache.lucene.analysis.Analyzer defaultAnalyzer()
                                                           throws SQLException

Get the default Analyzer associated with the database Locale.

Returns:

the default Analyzer

Throws:

SQLException - on error

getAnalyzerForLocale

public static org.apache.lucene.analysis.Analyzer getAnalyzerForLocale(Locale locale)
                                                                throws SQLException

Get the Analyzer associated with the given Locale.

Parameters:

locale - The locale whose Analyzer is needed

Returns:

the Analyzer associated with the given Locale.

Throws:

SQLException - on error

standardAnalyzer

public static org.apache.lucene.analysis.Analyzer standardAnalyzer()

Get the StandardAnalyzer for parsing text.

Returns:

the standard Analyzer

defaultQueryParser

public static org.apache.lucene.queryparser.classic.QueryParser defaultQueryParser(org.apache.lucene.util.Version version,
 String[] fieldNames,
 org.apache.lucene.analysis.Analyzer analyzer)

Get the default, classic QueryParser.

Parameters:

version - The Lucene version

fieldNames - The field names of interest

analyzer - The Analyzer to use

Returns:

the corresponding QueryParser

defaultIndexDescriptor

public static LuceneIndexDescriptor defaultIndexDescriptor()

Get the default index descriptor. This has a single field named TEXT, a defaultAnalyzer() and a defaultQueryParser().

Returns:

the default index descriptor