scala-lucene.scala

package com.postneo
package index
package test

import org.apache.lucene.analysis.SimpleAnalyzer
import org.apache.lucene.analysis.standard.StandardAnalyzer
import org.apache.lucene.document.{Document, Field}
import org.apache.lucene.index.{IndexWriter, Term}
import org.apache.lucene.search.{IndexSearcher, Query, TermQuery, TopDocs}
import org.apache.lucene.store.RAMDirectory

/**
  * A Somewhat literal translation of TheBasics (http://wiki.apache.org/lucene-java/TheBasics)
  * from Java to Scala
  */
object Test extends Application {
    // Create an in-memory directory
    val directory = new RAMDirectory

    // Create a writer
    val writer = new IndexWriter(directory, new SimpleAnalyzer, true, IndexWriter.MaxFieldLength.UNLIMITED)

    // Add some documents
    var doc = new Document
    doc.add(new Field("tweet", "Airplanes! @ New Century Airport http://gowal.la/c/4BqgN", Field.Store.YES, Field.Index.ANALYZED))
    doc.add(new Field("author", "mc", Field.Store.YES, Field.Index.NOT_ANALYZED))
    writer.addDocument(doc)
    println(writer.numDocs + " document(s) indexed.")
    writer.close

    // Create a searcher and get some results
    val searcher = new IndexSearcher(directory)
    val query = new TermQuery(new Term("tweet", "airport"))
    val results = searcher.search(query, null, 10)
    println(results.totalHits + " result(s).")

    // Present the first (and only) hit
    val firstHit = searcher.doc(results.scoreDocs(0).doc)
    println(firstHit.getField("tweet").stringValue)
}