net.semanticmetadata.lire.utils

类 LuceneUtils

java.lang.Object

net.semanticmetadata.lire.utils.LuceneUtils

public class LuceneUtils
extends java.lang.Object

This class provides some common functions for Lucene. As there are many changes to the API of Lucene over time this class is the central place to change common variable like the employed Lucene version. User: Mathias Date: 03.08.11 Time: 09:33

作者:

Mathias Lux, mathias@juggle.at, Nektarios Anagnostopoulos, nek.anag@gmail.com

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	LuceneUtils.AnalyzerType Different types of analyzers

字段概要

字段

限定符和类型	字段和说明
static org.apache.lucene.util.Version	LUCENE_VERSION Currently employed version of Lucene

构造器概要

构造器

构造器和说明
LuceneUtils()

方法概要

限定符和类型	方法和说明
static void	closeReader(org.apache.lucene.index.IndexReader reader)
static void	closeWriter(org.apache.lucene.index.IndexWriter iw)
static void	commitWriter(org.apache.lucene.index.IndexWriter iw)
static org.apache.lucene.index.IndexWriter	createIndexWriter(org.apache.lucene.store.Directory directory, boolean create, LuceneUtils.AnalyzerType analyzer) Creates an IndexWriter for given index path, with given analyzer.
static org.apache.lucene.index.IndexWriter	createIndexWriter(org.apache.lucene.store.Directory directory, boolean create, LuceneUtils.AnalyzerType analyzer, double RAMBufferSize)
static org.apache.lucene.index.IndexWriter	createIndexWriter(java.lang.String indexPath, boolean create) Creates an IndexWriter for given index path, with a SimpleAnalyzer.
static org.apache.lucene.index.IndexWriter	createIndexWriter(java.lang.String indexPath, boolean create, LuceneUtils.AnalyzerType analyzer) Creates an IndexWriter for given index path, with given analyzer.
static byte[]	getBytes(org.apache.lucene.util.BytesRef byteRef) Method for 'converting' ByteRefs to bytes.
static org.apache.lucene.index.IndexReader	openIndexReader(org.apache.lucene.store.FSDirectory directory)
static org.apache.lucene.index.IndexReader	openIndexReader(org.apache.lucene.store.FSDirectory directory, boolean RAMDirectory)
static org.apache.lucene.index.IndexReader	openIndexReader(org.apache.lucene.index.IndexWriter writer, boolean applyDeletes)
static org.apache.lucene.index.IndexReader	openIndexReader(java.lang.String indexPath)
static org.apache.lucene.index.IndexReader	openIndexReader(java.lang.String indexPath, boolean RAMDirectory)
static org.apache.lucene.search.IndexSearcher	openIndexSearcher(org.apache.lucene.index.IndexReader reader)
static void	optimizeWriter(org.apache.lucene.index.IndexWriter iw) Optimizes an index.

从类继承的方法 java.lang.Object

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

字段详细资料

LUCENE_VERSION

public static final org.apache.lucene.util.Version LUCENE_VERSION

Currently employed version of Lucene

构造器详细资料

LuceneUtils

public LuceneUtils()

方法详细资料

createIndexWriter

public static org.apache.lucene.index.IndexWriter createIndexWriter(java.lang.String indexPath,
                                                                    boolean create)
                                                             throws java.io.IOException

Creates an IndexWriter for given index path, with a SimpleAnalyzer.

参数:

indexPath - the path to the index directory

create - set to true if you want to create a new index

返回:

the IndexWriter

抛出:

java.io.IOException

createIndexWriter

public static org.apache.lucene.index.IndexWriter createIndexWriter(java.lang.String indexPath,
                                                                    boolean create,
                                                                    LuceneUtils.AnalyzerType analyzer)
                                                             throws java.io.IOException

Creates an IndexWriter for given index path, with given analyzer.

参数:

indexPath - the path to the index directory

create - set to true if you want to create a new index

analyzer - gives the analyzer used for the Indexwriter.

返回:

an IndexWriter

抛出:

java.io.IOException

createIndexWriter

public static org.apache.lucene.index.IndexWriter createIndexWriter(org.apache.lucene.store.Directory directory,
                                                                    boolean create,
                                                                    LuceneUtils.AnalyzerType analyzer)
                                                             throws java.io.IOException

Creates an IndexWriter for given index path, with given analyzer.

参数:

directory - the path to the index directory

create - set to true if you want to create a new index

analyzer - gives the analyzer used for the Indexwriter.

返回:

an IndexWriter

抛出:

java.io.IOException

createIndexWriter

public static org.apache.lucene.index.IndexWriter createIndexWriter(org.apache.lucene.store.Directory directory,
                                                                    boolean create,
                                                                    LuceneUtils.AnalyzerType analyzer,
                                                                    double RAMBufferSize)
                                                             throws java.io.IOException

抛出:

java.io.IOException

optimizeWriter

public static void optimizeWriter(org.apache.lucene.index.IndexWriter iw)
                           throws java.io.IOException

Optimizes an index.

参数:

iw -

抛出:

java.io.IOException

commitWriter

public static void commitWriter(org.apache.lucene.index.IndexWriter iw)
                         throws java.io.IOException

抛出:

java.io.IOException

closeWriter

public static void closeWriter(org.apache.lucene.index.IndexWriter iw)
                        throws java.io.IOException

抛出:

java.io.IOException

openIndexReader

public static org.apache.lucene.index.IndexReader openIndexReader(java.lang.String indexPath)
                                                           throws java.io.IOException

抛出:

java.io.IOException

openIndexReader

public static org.apache.lucene.index.IndexReader openIndexReader(java.lang.String indexPath,
                                                                  boolean RAMDirectory)
                                                           throws java.io.IOException

抛出:

java.io.IOException

openIndexReader

public static org.apache.lucene.index.IndexReader openIndexReader(org.apache.lucene.store.FSDirectory directory)
                                                           throws java.io.IOException

抛出:

java.io.IOException

openIndexReader

public static org.apache.lucene.index.IndexReader openIndexReader(org.apache.lucene.store.FSDirectory directory,
                                                                  boolean RAMDirectory)
                                                           throws java.io.IOException

抛出:

java.io.IOException

openIndexReader

public static org.apache.lucene.index.IndexReader openIndexReader(org.apache.lucene.index.IndexWriter writer,
                                                                  boolean applyDeletes)
                                                           throws java.io.IOException

抛出:

java.io.IOException

closeReader

public static void closeReader(org.apache.lucene.index.IndexReader reader)
                        throws java.io.IOException

抛出:

java.io.IOException

openIndexSearcher

public static org.apache.lucene.search.IndexSearcher openIndexSearcher(org.apache.lucene.index.IndexReader reader)

getBytes

public static byte[] getBytes(org.apache.lucene.util.BytesRef byteRef)

Method for 'converting' ByteRefs to bytes. This is a horrible way to do it. Main goal is to make it work. Later we'll fix the performance implications of that.

参数:

byteRef -

返回: