Lucene on XGUGENG

IndexOutput: Lucene Index Output

Mon, 09 Apr 2018 11:25:40 +0800

Immediately following Indexwriter: Lucene Index Creation and Maintenance, IndexOutput, a random-access output stream. is used for all Lucene index output operations.

IndexWriter: Lucene Index Creation and Maintenance

Tue, 03 Apr 2018 14:37:02 +0800

An IndexWriter creates and maintains an index. It’s the basic Class defined in Lucene Core.

Directory in Lucene

Tue, 05 Sep 2017 16:26:31 +0800

Directory represents the storage location of the indexes and generally it is a list of files. These files are called index files. Index files are normally created once and then used for read operation or can be deleted.

Document in Lucene

Mon, 07 Aug 2017 18:52:01 +0800

In Lucene, a Document is the unit of search and index.

An index consists of a sequence of documents.
A document contains of one or more Fields.
A field is a named sequence of terms.
A term is a string.

In order to index data with Lucene, you must convert it to a stream of plain-text tokens firstly. Based on the stream, the document containing fields will be created. After that, you can call addDocument method in IndexWriter class to transmit it to index. During this procedure, analyzer may be used to make the data more suitable for indexing.