Examples of org.apache.lucene.index.FilteredTermsEnum

org.apache.lucene.index.FilteredTermsEnum
Abstract class for enumerating a subset of all terms.
Term enumerations are always ordered by {@link #getComparator}. Each term in the enumeration is greater than all that precede it.

Please note: Consumers of this enum cannot call {@code seek()}, it is forward only; it throws {@link UnsupportedOperationException} when a seeking methodis called.

   *          the terms enum to filter
   * @return a filtered {@link TermsEnum} that only returns prefix coded 64 bit
   *         terms with a shift value of <tt>0</tt>.
   */
  public static TermsEnum filterPrefixCodedLongs(TermsEnum termsEnum) {
    return new FilteredTermsEnum(termsEnum, false) {
      @Override
      protected AcceptStatus accept(BytesRef term) {
        return NumericUtils.getPrefixCodedLongShift(term) == 0 ? AcceptStatus.YES : AcceptStatus.END;
      }
    };

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   *          the terms enum to filter
   * @return a filtered {@link TermsEnum} that only returns prefix coded 32 bit
   *         terms with a shift value of <tt>0</tt>.
   */
  public static TermsEnum filterPrefixCodedInts(TermsEnum termsEnum) {
    return new FilteredTermsEnum(termsEnum, false) {
      
      @Override
      protected AcceptStatus accept(BytesRef term) {
        return NumericUtils.getPrefixCodedIntShift(term) == 0 ? AcceptStatus.YES : AcceptStatus.END;
      }

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   *          the terms enum to filter
   * @return a filtered {@link TermsEnum} that only returns prefix coded 64 bit
   *         terms with a shift value of <tt>0</tt>.
   */
  public static TermsEnum filterPrefixCodedLongs(TermsEnum termsEnum) {
    return new FilteredTermsEnum(termsEnum, false) {
      @Override
      protected AcceptStatus accept(BytesRef term) {
        return NumericUtils.getPrefixCodedLongShift(term) == 0 ? AcceptStatus.YES : AcceptStatus.END;
      }
    };

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   *          the terms enum to filter
   * @return a filtered {@link TermsEnum} that only returns prefix coded 32 bit
   *         terms with a shift value of <tt>0</tt>.
   */
  public static TermsEnum filterPrefixCodedInts(TermsEnum termsEnum) {
    return new FilteredTermsEnum(termsEnum, false) {
      
      @Override
      protected AcceptStatus accept(BytesRef term) {
        return NumericUtils.getPrefixCodedIntShift(term) == 0 ? AcceptStatus.YES : AcceptStatus.END;
      }

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     * A {@link TermsEnum} that iterates only full precision prefix coded 64 bit values.
     *
     * @see #buildFromTerms(TermsEnum, Bits)
     */
    public static TermsEnum wrapNumeric64Bit(TermsEnum termsEnum) {
        return new FilteredTermsEnum(termsEnum, false) {
            @Override
            protected AcceptStatus accept(BytesRef term) throws IOException {
                // we stop accepting terms once we moved across the prefix codec terms - redundant values!
                return NumericUtils.getPrefixCodedLongShift(term) == 0 ? AcceptStatus.YES : AcceptStatus.END;
            }

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     * A {@link TermsEnum} that iterates only full precision prefix coded 32 bit values.
     *
     * @see #buildFromTerms(TermsEnum, Bits)
     */
    public static TermsEnum wrapNumeric32Bit(TermsEnum termsEnum) {
        return new FilteredTermsEnum(termsEnum, false) {


            @Override
            protected AcceptStatus accept(BytesRef term) throws IOException {
                // we stop accepting terms once we moved across the prefix codec terms - redundant values!
                return NumericUtils.getPrefixCodedIntShift(term) == 0 ? AcceptStatus.YES : AcceptStatus.END;

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Related Classes of org.apache.lucene.index.FilteredTermsEnum

org.apache.lucene.util.BytesRef

org.apache.lucene.util.NumericUtils

org.elasticsearch.index.fielddata.ordinals.OrdinalsBuilder

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