Java tutorial
/* * @author Jon Deering Copyright 2011 Saint Louis University. Licensed under the Educational Community License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.osedu.org/licenses/ECL-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package Search; import java.io.IOException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.logging.Level; import java.util.logging.Logger; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.index.CorruptIndexException; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.store.LockObtainFailedException; import org.apache.lucene.queryParser.*; import org.apache.lucene.analysis.*; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.index.Term; import org.apache.lucene.store.Directory; import org.apache.lucene.store.FSDirectory; import textdisplay.DatabaseWrapper; import textdisplay.Manuscript; import textdisplay.Transcription; /** * * Build an index of transcriptions, public and private */ public class TranscriptionIndexer { public static void main(String[] args) { try { new TranscriptionIndexer(); } catch (SQLException ex) { Logger.getLogger(TranscriptionIndexer.class.getName()).log(Level.SEVERE, null, ex); } catch (CorruptIndexException ex) { Logger.getLogger(TranscriptionIndexer.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(TranscriptionIndexer.class.getName()).log(Level.SEVERE, null, ex); } } /** * Build/rebuild the transcription search index from scratch * @throws SQLException * @throws CorruptIndexException * @throws IOException */ public TranscriptionIndexer() throws SQLException, CorruptIndexException, IOException { IndexWriter writer = null; Analyzer analyser; Directory directory; /**@TODO parameterized location*/ String dest = "/usr/indexTranscriptions"; directory = FSDirectory.getDirectory(dest, true); analyser = new StandardAnalyzer(); writer = new IndexWriter(directory, analyser, true); PreparedStatement stmt = null; Connection j = null; try { j = DatabaseWrapper.getConnection(); String query = "select * from transcription where text!='' and creator>0 order by folio, line"; stmt = j.prepareStatement(query); ResultSet rs = stmt.executeQuery(); while (rs.next()) { int folio = rs.getInt("folio"); int line = rs.getInt("line"); int UID = rs.getInt("creator"); int id = rs.getInt("id"); Transcription t = new Transcription(id); Document doc = new Document(); Field field; field = new Field("text", t.getText(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("comment", t.getComment(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("creator", "" + t.UID, Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("security", "" + "private", Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("line", "" + t.getLine(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("page", "" + t.getFolio(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("id", "" + t.getLineID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("manuscript", "" + new Manuscript(t.getFolio()).getID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("projectID", "" + t.getProjectID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); writer.addDocument(doc); } } catch (Exception ex) { ex.printStackTrace(); if (writer != null) { writer.commit(); writer.close(); return; } ex.printStackTrace(); } finally { DatabaseWrapper.closeDBConnection(j); DatabaseWrapper.closePreparedStatement(stmt); } writer.commit(); writer.close(); } /** * Update the text/comment/image positioning of a transcription that has previusly been indexed * @param t the transcription that was updated * @throws IOException * @throws SQLException */ public static void update(Transcription t) throws IOException, SQLException { IndexWriter writer = null; Analyzer analyser; Directory directory; /**@TODO parameterize this location*/ String dest = "/usr/indexTranscriptions"; directory = FSDirectory.getDirectory(dest, true); analyser = new StandardAnalyzer(); writer = new IndexWriter(directory, analyser, true); Term j = new Term("id", "" + t.getLineID()); writer.deleteDocuments(j); Document doc = new Document(); Field field; field = new Field("text", t.getText(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("comment", t.getComment(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("creator", "" + t.UID, Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("security", "" + "private", Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("line", "" + t.getLine(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("page", "" + t.getFolio(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("id", "" + t.getLineID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("manuscript", "" + new Manuscript(t.getFolio()).getID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("projectID", "" + t.getProjectID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); writer.addDocument(doc); writer.commit(); writer.close(); } /** * Add a transcription to the index * @param t Transcription that isnt currently indexed * @throws IOException * @throws SQLException */ public static void add(Transcription t) throws IOException, SQLException { IndexWriter writer = null; Analyzer analyser; Directory directory; /**@TODO parameterize this location*/ String dest = "/usr/indexTranscriptions"; directory = FSDirectory.getDirectory(dest, true); analyser = new StandardAnalyzer(); writer = new IndexWriter(directory, analyser, true); Document doc = new Document(); Field field; field = new Field("text", t.getText(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("comment", t.getComment(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("creator", "" + t.UID, Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("security", "" + "private", Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("line", "" + t.getLine(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("page", "" + t.getFolio(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("id", "" + t.getLineID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("manuscript", "" + new Manuscript(t.getFolio()).getID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); field = new Field("projectID", "" + t.getProjectID(), Field.Store.YES, Field.Index.ANALYZED); doc.add(field); writer.addDocument(doc); writer.commit(); writer.close(); } }