Java Code Examples for org.apache.lucene.analysis.WhitespaceAnalyzer

The following examples show how to use org.apache.lucene.analysis.WhitespaceAnalyzer. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: webdsl   Source File: AbstractIndexManager.java    License: Apache License 2.0 6 votes vote down vote up
protected static boolean clearIndex(File path) {
	try {
		if (path == null || !path.exists())
			return true; // if path doesnt exist, then there is nothing to
							// clear

		FSDirectory indexDir = new FSDirectoryProvider().getDirectory();
		IndexWriter writer = new IndexWriter(indexDir.open(path),
				new IndexWriterConfig(Version.LUCENE_CURRENT,
						new WhitespaceAnalyzer(Version.LUCENE_CURRENT)));
		writer.deleteAll();
		writer.close();
		return true;
	} catch (Exception ex) {
		org.webdsl.logging.Logger.error(
				"Error while clearing index on location: " + path, ex);
		return false;
	}

}
 
Example 2
Source Project: webdsl   Source File: AutoCompleter.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * Use a different index as the auto completer index or re-open
 * the existing index if <code>autocompleteIndex</code> is the same value
 * as given in the constructor.
 * @param autocompleteIndexDir the autocomplete directory to use
 * @throws AlreadyClosedException if the Autocompleter is already closed
 * @throws  IOException if autocompleter can not open the directory
 */
// TODO: we should make this final as it is called in the constructor
public void setAutoCompleteIndex(Directory autocompleteIndexDir) throws IOException {
  // this could be the same directory as the current autocompleteIndex
  // modifications to the directory should be synchronized
  synchronized (modifyCurrentIndexLock) {
    ensureOpen();
    if (!IndexReader.indexExists(autocompleteIndexDir)) {
        IndexWriter writer = new IndexWriter(autocompleteIndexDir,
          new IndexWriterConfig(Version.LUCENE_CURRENT,
              new WhitespaceAnalyzer(Version.LUCENE_CURRENT)));
        writer.close();
    }
    swapSearcher(autocompleteIndexDir);
  }
}
 
Example 3
Source Project: netbeans   Source File: DocumentUtil.java    License: Apache License 2.0 5 votes vote down vote up
public static Analyzer createAnalyzer() {
    final PerFieldAnalyzerWrapper analyzer = new PerFieldAnalyzerWrapper(new KeywordAnalyzer());
    analyzer.addAnalyzer(DocumentUtil.FIELD_IDENTS, new WhitespaceAnalyzer());
    analyzer.addAnalyzer(DocumentUtil.FIELD_FEATURE_IDENTS, new WhitespaceAnalyzer());
    analyzer.addAnalyzer(DocumentUtil.FIELD_CASE_INSENSITIVE_FEATURE_IDENTS, new DocumentUtil.LCWhitespaceAnalyzer());
    return analyzer;
}
 
Example 4
Source Project: webdsl   Source File: AutoCompleter.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Removes all terms from the auto complete index.
 * @throws IOException
 * @throws AlreadyClosedException if the Autocompleter is already closed
 */
public void clearIndex() throws IOException {
  synchronized (modifyCurrentIndexLock) {
    ensureOpen();
    final Directory dir = this.autoCompleteIndex;
    final IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(
        Version.LUCENE_CURRENT,
        new WhitespaceAnalyzer(Version.LUCENE_CURRENT))
        .setOpenMode(OpenMode.CREATE));
    writer.close();
    swapSearcher(dir);
  }
}
 
Example 5
Source Project: webdsl   Source File: AutoCompleter.java    License: Apache License 2.0 5 votes vote down vote up
/**
  * Indexes the data from the given reader.
* @param reader Source index reader, from which autocomplete words are obtained for the defined field
* @param field the field of the source index reader to index for autocompletion
* @param mergeFactor mergeFactor to use when indexing
* @param ramMB the max amount or memory in MB to use
* @param optimize whether or not the autocomplete index should be optimized
  * @throws AlreadyClosedException if the Autocompleter is already closed
  * @throws IOException
  */
 public final void indexDictionary(IndexReader reader, String field, int mergeFactor, int ramMB, boolean optimize) throws IOException {
   synchronized (modifyCurrentIndexLock) {
     ensureOpen();
     final Directory dir = this.autoCompleteIndex;
     final Dictionary dict = new LuceneDictionary(reader, field);
     final IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(Version.LUCENE_CURRENT, new WhitespaceAnalyzer(Version.LUCENE_CURRENT)).setRAMBufferSizeMB(ramMB));
     IndexSearcher indexSearcher = obtainSearcher();
     final List<IndexReader> readers = new ArrayList<IndexReader>();

     if (searcher.maxDoc() > 0) {
       ReaderUtil.gatherSubReaders(readers, searcher.getIndexReader());
     }

     //clear the index
     writer.deleteAll();

     try {
       Iterator<String> iter = dict.getWordsIterator();

     while (iter.hasNext()) {
         String word = iter.next();

         // ok index the word
         Document doc = createDocument(word, reader.docFreq(new Term(field, word)));
         writer.addDocument(doc);
       }
     } finally {
       releaseSearcher(indexSearcher);
     }
     // close writer
     if (optimize)
       writer.optimize();
     writer.close();
     // also re-open the autocomplete index to see our own changes when the next suggestion
     // is fetched:
     swapSearcher(dir);
   }
 }
 
Example 6
Source Project: gumtree-spoon-ast-diff   Source File: left_TestSpans_1.3.java    License: Apache License 2.0 5 votes vote down vote up
public void setUp() throws Exception {
  RAMDirectory directory = new RAMDirectory();
  IndexWriter writer= new IndexWriter(directory, new WhitespaceAnalyzer(), true);
  StringBuffer buffer = new StringBuffer();
  for (int i = 0; i < docFields.length; i++) {
    Document doc = new Document();
    doc.add(Field.Text(field, docFields[i]));
    writer.addDocument(doc);
  }
  writer.close();
  searcher = new IndexSearcher(directory);
}
 
Example 7
public void setUp() throws Exception {
  RAMDirectory directory = new RAMDirectory();
  IndexWriter writer= new IndexWriter(directory, new WhitespaceAnalyzer(), true);
  for (int i = 0; i < docFields.length; i++) {
    Document doc = new Document();
    doc.add(Field.Text(field, docFields[i]));
    writer.addDocument(doc);
  }
  writer.close();
  searcher = new IndexSearcher(directory);
}
 
Example 8
Source Project: imhotep   Source File: TestCloseSessionDuringFTGS.java    License: Apache License 2.0 4 votes vote down vote up
@Test
    public void testCloseSessionDuringFTGS() throws ImhotepOutOfMemoryException, IOException, InterruptedException {
        String tempDir = Files.getTempDirectory("asdf", "");
        try {
            IndexWriter w = new IndexWriter(tempDir, new WhitespaceAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED);

            Random rand = new Random();
            for (int i = 0; i < 1000000; ++i) {
                int numTerms = rand.nextInt(5) + 5;
                Document doc = new Document();
                for (int t = 0; t < numTerms; ++t) {
                    doc.add(new Field("sf1", Integer.toString(rand.nextInt(10000)), Field.Store.NO, Field.Index.NOT_ANALYZED_NO_NORMS));
                }
                w.addDocument(doc);
            }

            w.close();

            final AtomicBoolean closed = new AtomicBoolean(false);
            FlamdexReader r = new LuceneFlamdexReader(IndexReader.open(tempDir)) {
                @Override
                public void close() throws IOException {
                    super.close();
                    closed.set(true);
                }
            };
            final ExecutorService executor = Executors.newCachedThreadPool();
            try {
                ImhotepSession session =
                        new MTImhotepMultiSession(new ImhotepLocalSession[] { new ImhotepLocalSession(r) },
                                                  new MemoryReservationContext(
                                                                               new ImhotepMemoryPool(
                                                                                                     Long.MAX_VALUE)),
                                                  executor, null);
//                FTGSIterator iter = session.getFTGSIterator(new String[]{}, new String[]{"sf1"}); //TODO fix this
                session.close();
                assertTrue(closed.get());
            } finally {
                executor.shutdown();
            }
        } finally {
            Files.delete(tempDir);
        }
    }