Examples of org.apache.lucene.document.FieldSelector

org.apache.lucene.document.FieldSelector
Similar to a {@link java.io.FileFilter}, the FieldSelector allows one to make decisions about what Fields get loaded on a {@link Document} by {@link org.apache.lucene.index.IndexReader#document(int,org.apache.lucene.document.FieldSelector)}


    if (mergeDocStores) {


      // for merging we don't want to compress/uncompress the data, so to tell the FieldsReader that we're
      // in  merge mode, we use this FieldSelector
      FieldSelector fieldSelectorMerge = new FieldSelector() {
          public FieldSelectorResult accept(String fieldName) {
            return FieldSelectorResult.LOAD_FOR_MERGE;
          }        
        };

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        for (int i = 0; i < bin.length; i++) {
          assertEquals(bin[i], data1[i + b1.getBinaryOffset()]);
        }
        Set lazyFields = new HashSet();
        lazyFields.add("bin1");
        FieldSelector sel = new SetBasedFieldSelector(new HashSet(), lazyFields);
        doc = reader.document(reader.maxDoc() - 1, sel);
        Fieldable[] fieldables = doc.getFieldables("bin1");
        assertNotNull(fieldables);
        assertEquals(1, fieldables.length);
        Fieldable fb1 = fieldables[0];

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    FieldsWriter fieldsWriter = // merge field values
            new FieldsWriter(directory, segment, fieldInfos);
    
    // for merging we don't want to compress/uncompress the data, so to tell the FieldsReader that we're
    // in  merge mode, we use this FieldSelector
    FieldSelector fieldSelectorMerge = new FieldSelector() {
      public FieldSelectorResult accept(String fieldName) {
        return FieldSelectorResult.LOAD_FOR_MERGE;
      }        
    };

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        for (int i = 0; i < bin.length; i++) {
          assertEquals(bin[i], data1[i + b1.getBinaryOffset()]);
        }
        Set<String> lazyFields = new HashSet<String>();
        lazyFields.add("bin1");
        FieldSelector sel = new SetBasedFieldSelector(new HashSet<String>(), lazyFields);
        doc = reader.document(reader.maxDoc() - 1, sel);
        Fieldable[] fieldables = doc.getFieldables("bin1");
        assertNotNull(fieldables);
        assertEquals(1, fieldables.length);
        Fieldable fb1 = fieldables[0];

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        for (int i = 0; i < bin.length; i++) {
          assertEquals(bin[i], data1[i + b1.getBinaryOffset()]);
        }
        Set<String> lazyFields = new HashSet<String>();
        lazyFields.add("bin1");
        FieldSelector sel = new SetBasedFieldSelector(new HashSet<String>(), lazyFields);
        doc = reader.document(reader.maxDoc() - 1, sel);
        Fieldable[] fieldables = doc.getFieldables("bin1");
        assertNotNull(fieldables);
        assertEquals(1, fieldables.length);
        Fieldable fb1 = fieldables[0];

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        for (int i = 0; i < bin.length; i++) {
          assertEquals(bin[i], data1[i + b1.getBinaryOffset()]);
        }
        Set lazyFields = new HashSet();
        lazyFields.add("bin1");
        FieldSelector sel = new SetBasedFieldSelector(new HashSet(), lazyFields);
        doc = reader.document(reader.maxDoc() - 1, sel);
        Fieldable[] fieldables = doc.getFieldables("bin1");
        assertNotNull(fieldables);
        assertEquals(1, fieldables.length);
        Fieldable fb1 = fieldables[0];

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        IndexReader reader = IndexReader.open(indexWriter, true);
        IndexSearcher searcher = new IndexSearcher(reader);
        TopDocs topDocs = searcher.search(new TermQuery(new Term("_id", "1")), 1);
        final ArrayList<String> fieldsOrder = new ArrayList<String>();
        Document doc = searcher.doc(topDocs.scoreDocs[0].doc, new FieldSelector() {
            @Override public FieldSelectorResult accept(String fieldName) {
                fieldsOrder.add(fieldName);
                return FieldSelectorResult.LOAD;
            }
        });

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                                                String idField) throws IOException {
    int numDocs = reader.numDocs();


    OpenBitSet bitset = new OpenBitSet(numDocs);


    FieldSelector idFieldSelector =
        new SetBasedFieldSelector(Collections.singleton(idField), Collections.<String>emptySet());


    for (int i = 0; i < numDocs; i++) {
      String id;
      // Use Lucene's internal ID if idField is not specified. Else, get it from the document.

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                                                String idField) throws IOException {
    int numDocs = reader.numDocs();


    OpenBitSet bitset = new OpenBitSet(numDocs);


    FieldSelector idFieldSelector =
        new SetBasedFieldSelector(Collections.singleton(idField), Collections.<String>emptySet());


    for (int i = 0; i < numDocs; i++) {
      String id;
      // Use Lucene's internal ID if idField is not specified. Else, get it from the document.

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      };
    }


    SolrIndexSearcher searcher = sreq.getSearcher();
    List<Document> result = new ArrayList<Document>(docList.size());
    FieldSelector fieldSelector = new SetBasedFieldSelector(fieldsToLoad,
            Collections.emptySet());
    float[] scores = {1.0f};
    int[] docsHolder = new int[1];
    Query theQuery = query;

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