Examples of org.apache.lucene.document.SortedSetDocValuesField

org.apache.lucene.document.SortedSetDocValuesField
Field that stores a set of per-document {@link BytesRef} values, indexed forfaceting,grouping,joining. Here's an example usage:
```
 document.add(new SortedSetDocValuesField(name, new BytesRef("hello"))); document.add(new SortedSetDocValuesField(name, new BytesRef("world"))); 
```
If you also need to store the value, you should add a separate {@link StoredField} instance.

    IndexWriterConfig iwconfig = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
    iwconfig.setMergePolicy(newLogMergePolicy());
    RandomIndexWriter iwriter = new RandomIndexWriter(random(), directory, iwconfig);
    
    Document doc = new Document();
    doc.add(new SortedSetDocValuesField("field", new BytesRef("hello")));
    iwriter.addDocument(doc);
    iwriter.commit();
    
    doc = new Document();
    iwriter.addDocument(doc);

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    Document doc = new Document();
    iwriter.addDocument(doc);
    
    doc = new Document();
    doc.add(new SortedSetDocValuesField("field", new BytesRef("hello")));
    iwriter.addDocument(doc);
    
    iwriter.forceMerge(1);
    DirectoryReader ireader = iwriter.getReader();
    iwriter.close();

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    Document doc = new Document();
    iwriter.addDocument(doc);
    iwriter.commit();
    
    doc = new Document();
    doc.add(new SortedSetDocValuesField("field", new BytesRef("hello")));
    iwriter.addDocument(doc);
    iwriter.forceMerge(1);
    
    DirectoryReader ireader = iwriter.getReader();
    iwriter.close();

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    Document doc = new Document();
    doc.add(new StringField("id", "0", Field.Store.NO));
    iwriter.addDocument(doc);    
    doc = new Document();
    doc.add(new StringField("id", "1", Field.Store.NO));
    doc.add(new SortedSetDocValuesField("field", new BytesRef("hello")));
    iwriter.addDocument(doc);
    iwriter.commit();
    iwriter.deleteDocuments(new Term("id", "1"));
    iwriter.forceMerge(1);

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    IndexWriterConfig iwconfig = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
    iwconfig.setMergePolicy(newLogMergePolicy());
    RandomIndexWriter iwriter = new RandomIndexWriter(random(), directory, iwconfig);
    
    Document doc = new Document();
    doc.add(new SortedSetDocValuesField("field", new BytesRef("hello")));
    doc.add(new SortedSetDocValuesField("field", new BytesRef("world")));
    doc.add(new SortedSetDocValuesField("field", new BytesRef("beer")));
    iwriter.addDocument(doc);
    
    DirectoryReader ireader = iwriter.getReader();
    iwriter.close();

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      // add in any order to the dv field
      ArrayList<String> unordered = new ArrayList<>(values);
      Collections.shuffle(unordered, random());
      for (String v : unordered) {
        doc.add(new SortedSetDocValuesField("dv", new BytesRef(v)));
      }


      writer.addDocument(doc);
      if (random().nextInt(31) == 0) {
        writer.commit();

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      // add in any order to the dv field
      ArrayList<String> unordered2 = new ArrayList<>(values);
      Collections.shuffle(unordered2, random());
      for (String v : unordered2) {
        doc.add(new SortedSetDocValuesField("dv", new BytesRef(v)));
      }


      writer.addDocument(doc);
      if (random().nextInt(31) == 0) {
        writer.commit();

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      Set<String> values = new TreeSet<>();
      for (int j = 0; j < numSortedSetFields; j++) {
        values.add(TestUtil.randomSimpleString(random()));
      }
      for (String v : values) {
        doc.add(new SortedSetDocValuesField("dvSortedSet", new BytesRef(v)));
        doc.add(new StoredField("storedSortedSet", v));
      }
      int numSortedNumericFields = random().nextInt(3);
      Set<Long> numValues = new TreeSet<>();
      for (int j = 0; j < numSortedNumericFields; j++) {

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        doc.add(newStringField("id", Integer.toString(i), Field.Store.NO));
        doc.add(new NumericDocValuesField("dv", i));
        doc.add(new BinaryDocValuesField("dv2", new BytesRef(Integer.toString(i))));
        doc.add(new SortedDocValuesField("dv3", new BytesRef(Integer.toString(i))));
        if (defaultCodecSupportsSortedSet()) {
          doc.add(new SortedSetDocValuesField("dv4", new BytesRef(Integer.toString(i))));
          doc.add(new SortedSetDocValuesField("dv4", new BytesRef(Integer.toString(i-1))));
        }
        if (defaultCodecSupportsSortedNumeric()) {
          doc.add(new SortedNumericDocValuesField("dv5", i));
          doc.add(new SortedNumericDocValuesField("dv5", i-1));
        }

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    Document doc = new Document();
    doc.add(new BinaryDocValuesField("binary", new BytesRef("binary value")));
    doc.add(new SortedDocValuesField("sorted", new BytesRef("sorted value")));
    doc.add(new NumericDocValuesField("numeric", 42));
    if (defaultCodecSupportsSortedSet()) {
      doc.add(new SortedSetDocValuesField("sortedset", new BytesRef("sortedset value1")));
      doc.add(new SortedSetDocValuesField("sortedset", new BytesRef("sortedset value2")));
    }
    iw.addDocument(doc);
    DirectoryReader ir = iw.getReader();
    iw.close();
    AtomicReader ar = getOnlySegmentReader(ir);

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