Examples of org.apache.lucene.document.BinaryDocValuesField

org.apache.lucene.document.BinaryDocValuesField
Field that stores a per-document {@link BytesRef} value.
The values are stored directly with no sharing, which is a good fit when the fields don't share (many) values, such as a title field. If values may be shared and sorted it's better to use {@link SortedDocValuesField}. Here's an example usage:
```
 document.add(new BinaryDocValuesField(name, new BytesRef("hello"))); 
```
If you also need to store the value, you should add a separate {@link StoredField} instance. @see BinaryDocValues

    Directory directory = newDirectory();
    IndexWriterConfig conf = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
    conf.setMergePolicy(newLogMergePolicy());
    RandomIndexWriter iwriter = new RandomIndexWriter(random(), directory, conf);
    Document doc = new Document();
    doc.add(new BinaryDocValuesField("dv", new BytesRef("hello\nworld\r1")));
    iwriter.addDocument(doc);
    iwriter.close();
    
    // Now search the index:
    IndexReader ireader = DirectoryReader.open(directory); // read-only=true

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    Directory directory = newDirectory();
    IndexWriterConfig conf = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
    conf.setMergePolicy(newLogMergePolicy());
    RandomIndexWriter iwriter = new RandomIndexWriter(random(), directory, conf);
    Document doc = new Document();
    doc.add(new BinaryDocValuesField("dv", new BytesRef("")));
    iwriter.addDocument(doc);
    doc = new Document();
    doc.add(new BinaryDocValuesField("dv", new BytesRef("")));
    iwriter.addDocument(doc);
    iwriter.forceMerge(1);
    iwriter.close();
    
    // Now search the index:

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    RandomIndexWriter iwriter = new RandomIndexWriter(random(), directory, conf);
    Document doc = new Document();
    byte bytes[] = new byte[32766];
    BytesRef b = new BytesRef(bytes);
    random().nextBytes(bytes);
    doc.add(new BinaryDocValuesField("dv", b));
    iwriter.addDocument(doc);
    iwriter.close();
    
    // Now search the index:
    IndexReader ireader = DirectoryReader.open(directory); // read-only=true

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    Directory directory = newDirectory();
    IndexWriterConfig conf = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
    conf.setMergePolicy(newLogMergePolicy());
    RandomIndexWriter iwriter = new RandomIndexWriter(random(), directory, conf);
    Document doc = new Document();
    doc.add(new BinaryDocValuesField("dv", new BytesRef("boo!")));
    iwriter.addDocument(doc);
    iwriter.close();
    
    // Now search the index:
    IndexReader ireader = DirectoryReader.open(directory); // read-only=true

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    Directory directory = newDirectory();
    IndexWriterConfig conf = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
    conf.setMergePolicy(newLogMergePolicy());
    RandomIndexWriter iwriter = new RandomIndexWriter(random(), directory, conf);
    Document doc = new Document();
    doc.add(new BinaryDocValuesField("dv", new BytesRef("foo!")));
    iwriter.addDocument(doc);
    doc = new Document();
    doc.add(new BinaryDocValuesField("dv", new BytesRef("bar!")));
    iwriter.addDocument(doc);
    iwriter.close();
    
    // Now search the index:
    IndexReader ireader = DirectoryReader.open(directory); // read-only=true

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    IndexWriterConfig conf = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
    RandomIndexWriter writer = new RandomIndexWriter(random(), dir, conf);
    Document doc = new Document();
    Field idField = new StringField("id", "", Field.Store.NO);
    Field storedField = new StoredField("stored", new byte[0]);
    Field dvField = new BinaryDocValuesField("dv", new BytesRef());
    doc.add(idField);
    doc.add(storedField);
    doc.add(dvField);
    
    // index some docs
    int numDocs = atLeast(1000);
    for (int i = 0; i < numDocs; i++) {
      idField.setStringValue(Integer.toString(i));
      final int length;
      if (minLength == maxLength) {
        length = minLength; // fixed length
      } else {
        length = _TestUtil.nextInt(random(), minLength, maxLength);
      }
      byte buffer[] = new byte[length];
      random().nextBytes(buffer);
      storedField.setBytesValue(buffer);
      dvField.setBytesValue(buffer);
      writer.addDocument(doc);
      if (random().nextInt(31) == 0) {
        writer.commit();
      }
    }

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  /** Tests sorting on type string_val */
  public void testStringVal() throws IOException {
    Directory dir = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random(), dir);
    Document doc = new Document();
    doc.add(new BinaryDocValuesField("value", new BytesRef("foo")));
    doc.add(newStringField("value", "foo", Field.Store.YES));
    writer.addDocument(doc);
    doc = new Document();
    doc.add(new BinaryDocValuesField("value", new BytesRef("bar")));
    doc.add(newStringField("value", "bar", Field.Store.YES));
    writer.addDocument(doc);
    IndexReader ir = writer.getReader();
    writer.close();

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  /** Tests reverse sorting on type string_val */
  public void testStringValReverse() throws IOException {
    Directory dir = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random(), dir);
    Document doc = new Document();
    doc.add(new BinaryDocValuesField("value", new BytesRef("bar")));
    doc.add(newStringField("value", "bar", Field.Store.YES));
    writer.addDocument(doc);
    doc = new Document();
    doc.add(new BinaryDocValuesField("value", new BytesRef("foo")));
    doc.add(newStringField("value", "foo", Field.Store.YES));
    writer.addDocument(doc);
    IndexReader ir = writer.getReader();
    writer.close();

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    Document doc = new Document();
    String longTerm = "longtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongterm";
    String text = "This is the text to be indexed. " + longTerm;
    doc.add(newTextField("fieldname", text, Field.Store.YES));
    doc.add(new NumericDocValuesField("dv1", 5));
    doc.add(new BinaryDocValuesField("dv2", new BytesRef("hello world")));
    iwriter.addDocument(doc);
    iwriter.close();
    
    // Now search the index:
    IndexReader ireader = DirectoryReader.open(directory); // read-only=true

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      IndexWriter w = new IndexWriter(adder, conf);
      Document doc = new Document();
      doc.add(newStringField(random, "id", "500", Field.Store.NO));
      doc.add(newField(random, "field", "some prepackaged text contents", storedTextType));
      if (defaultCodecSupportsDocValues()) {
        doc.add(new BinaryDocValuesField("binarydv", new BytesRef("500")));
        doc.add(new NumericDocValuesField("numericdv", 500));
        doc.add(new SortedDocValuesField("sorteddv", new BytesRef("500")));
      }
      if (defaultCodecSupportsSortedSet()) {
        doc.add(new SortedSetDocValuesField("sortedsetdv", new BytesRef("one")));
        doc.add(new SortedSetDocValuesField("sortedsetdv", new BytesRef("two")));
      }
      w.addDocument(doc);
      doc = new Document();
      doc.add(newStringField(random, "id", "501", Field.Store.NO));
      doc.add(newField(random, "field", "some more contents", storedTextType));
      if (defaultCodecSupportsDocValues()) {
        doc.add(new BinaryDocValuesField("binarydv", new BytesRef("501")));
        doc.add(new NumericDocValuesField("numericdv", 501));
        doc.add(new SortedDocValuesField("sorteddv", new BytesRef("501")));
      }
      if (defaultCodecSupportsSortedSet()) {
        doc.add(new SortedSetDocValuesField("sortedsetdv", new BytesRef("two")));

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