Java BytesRef類代碼示例

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
private BytesReference getRandomizedBytesReference(int length) throws IOException {
    // we know bytes stream output always creates a paged bytes reference, we use it to create randomized content
    ReleasableBytesStreamOutput out = new ReleasableBytesStreamOutput(length, bigarrays);
    for (int i = 0; i < length; i++) {
        out.writeByte((byte) random().nextInt(1 << 8));
    }
    assertEquals(out.size(), length);
    BytesReference ref = out.bytes();
    assertEquals(ref.length(), length);
    if (randomBoolean()) {
        return new BytesArray(ref.toBytesRef());
    } else if (randomBoolean()) {
        BytesRef bytesRef = ref.toBytesRef();
        return Netty4Utils.toBytesReference(Unpooled.wrappedBuffer(bytesRef.bytes, bytesRef.offset,
            bytesRef.length));
    } else {
        return ref;
    }
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
public void testIteratorRandom() throws IOException {
    int length = randomIntBetween(10, PAGE_SIZE * randomIntBetween(2, 8));
    BytesReference pbr = newBytesReference(length);
    if (randomBoolean()) {
        int sliceOffset = randomIntBetween(0, pbr.length());
        int sliceLength = randomIntBetween(0, pbr.length() - sliceOffset);
        pbr = pbr.slice(sliceOffset, sliceLength);
    }

    if (randomBoolean()) {
        pbr = new BytesArray(pbr.toBytesRef());
    }
    BytesRefIterator iterator = pbr.iterator();
    BytesRef ref = null;
    BytesRefBuilder builder = new BytesRefBuilder();
    while((ref = iterator.next()) != null) {
        builder.append(ref);
    }
    assertArrayEquals(BytesReference.toBytes(pbr), BytesRef.deepCopyOf(builder.toBytesRef()).bytes);
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
@Override
public long lookupTerm(BytesRef key) {
  try {
    switch (te.seekCeil(key)) {
      case FOUND:           
        assert te.ord() >= 0;
        return te.ord();
      case NOT_FOUND:
        assert te.ord() >= 0;
        return -te.ord()-1;
      default: /* END */
        return -numTerms()-1;
    }
  } catch (IOException e) {
    throw new RuntimeException(e);
  }
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
public static PartitionName toPartitionName(TableIdent tableIdent,
                                            @Nullable DocTableInfo docTableInfo,
                                            List<Assignment> partitionProperties,
                                            Object[] parameters) {
    if (docTableInfo != null) {
        return toPartitionName(docTableInfo, partitionProperties, parameters);
    }

    // Because only TableIdent is available, types of partitioned columns must be guessed
    Map<ColumnIdent, Object> properties = assignmentsToMap(partitionProperties, parameters);
    BytesRef[] values = new BytesRef[properties.size()];

    int idx = 0;
    for (Object o : properties.values()) {
        values[idx++] = DataTypes.STRING.value(o);
    }
    return new PartitionName(tableIdent, Arrays.asList(values));
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
public void testSortMetaField() throws Exception {
    createIndex("test");
    ensureGreen();
    final int numDocs = randomIntBetween(10, 20);
    IndexRequestBuilder[] indexReqs = new IndexRequestBuilder[numDocs];
    for (int i = 0; i < numDocs; ++i) {
        indexReqs[i] = client().prepareIndex("test", "type", Integer.toString(i))
                .setSource();
    }
    indexRandom(true, indexReqs);

    SortOrder order = randomFrom(SortOrder.values());
    SearchResponse searchResponse = client().prepareSearch()
            .setQuery(matchAllQuery())
            .setSize(randomIntBetween(1, numDocs + 5))
            .addSort("_uid", order)
            .execute().actionGet();
    assertNoFailures(searchResponse);
    SearchHit[] hits = searchResponse.getHits().getHits();
    BytesRef previous = order == SortOrder.ASC ? new BytesRef() : UnicodeUtil.BIG_TERM;
    for (int i = 0; i < hits.length; ++i) {
        final BytesRef uid = new BytesRef(Uid.createUid(hits[i].getType(), hits[i].getId()));
        assertThat(previous, order == SortOrder.ASC ? lessThan(uid) : greaterThan(uid));
        previous = uid;
    }
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
public static BytesRef[] splitUidIntoTypeAndId(BytesRef uid) {
    int loc = -1;
    final int limit = uid.offset + uid.length;
    for (int i = uid.offset; i < limit; i++) {
        if (uid.bytes[i] == Uid.DELIMITER_BYTE) { // 0x23 is equal to '#'
            loc = i;
            break;
        }
    }

    if (loc == -1) {
        return null;
    }

    int idStart = loc + 1;
    return new BytesRef[] {
        new BytesRef(uid.bytes, uid.offset, loc - uid.offset),
        new BytesRef(uid.bytes, idStart, limit - idStart)
    };
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
private Query getRangeQuerySingle(String field, String part1, String part2,
        boolean startInclusive, boolean endInclusive, QueryShardContext context) {
    currentFieldType = context.fieldMapper(field);
    if (currentFieldType != null) {
        try {
            BytesRef part1Binary = part1 == null ? null : getAnalyzer().normalize(field, part1);
            BytesRef part2Binary = part2 == null ? null : getAnalyzer().normalize(field, part2);
            Query rangeQuery;
            if (currentFieldType instanceof DateFieldMapper.DateFieldType && settings.timeZone() != null) {
                DateFieldMapper.DateFieldType dateFieldType = (DateFieldMapper.DateFieldType) this.currentFieldType;
                rangeQuery = dateFieldType.rangeQuery(part1Binary, part2Binary,
                        startInclusive, endInclusive, settings.timeZone(), null, context);
            } else {
                rangeQuery = currentFieldType.rangeQuery(part1Binary, part2Binary, startInclusive, endInclusive, context);
            }
            return rangeQuery;
        } catch (RuntimeException e) {
            if (settings.lenient()) {
                return null;
            }
            throw e;
        }
    }
    return newRangeQuery(field, part1, part2, startInclusive, endInclusive);
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
private BinaryDocValues getVariableBinary(FieldInfo field, final BinaryEntry bytes) throws IOException {
  final IndexInput data = this.data.clone();
  
  final MonotonicBlockPackedReader addresses = getAddressInstance(data, field, bytes);

  return new LongBinaryDocValues() {
    final BytesRef term = new BytesRef(Math.max(0, bytes.maxLength));

    @Override
    public BytesRef get(long id) {
      long startAddress = bytes.offset + (id == 0 ? 0 : addresses.get(id-1));
      long endAddress = bytes.offset + addresses.get(id);
      int length = (int) (endAddress - startAddress);
      try {
        data.seek(startAddress);
        data.readBytes(term.bytes, 0, length);
        term.length = length;
        return term;
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
    }
  };
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
@Override
public BytesRef indexedValueForSearch(Object value) {
    if (value == null) {
        return Values.FALSE;
    }
    if (value instanceof Boolean) {
        return ((Boolean) value) ? Values.TRUE : Values.FALSE;
    }
    String sValue;
    if (value instanceof BytesRef) {
        sValue = ((BytesRef) value).utf8ToString();
    } else {
        sValue = value.toString();
    }
    if (sValue.length() == 0) {
        return Values.FALSE;
    }
    if (sValue.length() == 1 && sValue.charAt(0) == 'F') {
        return Values.FALSE;
    }
    if (Booleans.parseBoolean(sValue, false)) {
        return Values.TRUE;
    }
    return Values.FALSE;
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
@Override
public Filter getFilter(Element e) throws ParserException {
  List<BytesRef> terms = new ArrayList<>();
  String text = DOMUtils.getNonBlankTextOrFail(e);
  String fieldName = DOMUtils.getAttributeWithInheritanceOrFail(e, "fieldName");

  TokenStream ts = null;
  try {
    ts = analyzer.tokenStream(fieldName, text);
    TermToBytesRefAttribute termAtt = ts.addAttribute(TermToBytesRefAttribute.class);
    BytesRef bytes = termAtt.getBytesRef();
    ts.reset();
    while (ts.incrementToken()) {
      termAtt.fillBytesRef();
      terms.add(BytesRef.deepCopyOf(bytes));
    }
    ts.end();
  }
  catch (IOException ioe) {
    throw new RuntimeException("Error constructing terms from index:" + ioe);
  } finally {
    IOUtils.closeWhileHandlingException(ts);
  }
  return new TermsFilter(fieldName, terms);
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
private void appendRandomData(IndexOutput output) throws IOException {
    int numBytes = randomIntBetween(1, 1024);
    final BytesRef ref = new BytesRef(scaledRandomIntBetween(1, numBytes));
    ref.length = ref.bytes.length;
    while (numBytes > 0) {
        if (random().nextInt(10) == 0) {
            output.writeByte(randomByte());
            numBytes--;
        } else {
            for (int i = 0; i<ref.length; i++) {
                ref.bytes[i] = randomByte();
            }
            final int min = Math.min(numBytes, ref.bytes.length);
            output.writeBytes(ref.bytes, ref.offset, min);
            numBytes -= min;
        }
    }
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
/**
 * 將Product對象序列化存入payload
 * [這裏僅僅是個示例，其實這種做法不可取,一般不會把整個對象存入payload,這樣索引體積會很大，浪費硬盤空間]
 */
@Override
public BytesRef payload() {
    try {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(bos);
        out.writeObject(currentProduct);
        out.close();
        return new BytesRef(bos.toByteArray());
    } catch (IOException e) {
        throw new RuntimeException("Well that's unfortunate.");
    }
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
/**
 * Given a document and a term, return the term itself if it exists or
 * <tt>null</tt> otherwise.
 */
private BytesRef getComparableBytes(int doc, BytesRef term) {
  if (term.length == 0 && isNull(doc, term)) {
    return null;
  }
  return term;
}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
protected ClusterLoggingOverridesChildExpression(final Map.Entry<String, String> setting) {
    childImplementations.put(NAME, new SimpleObjectExpression<BytesRef>() {
        @Override
        public BytesRef value() {
            return new BytesRef(setting.getKey());
        }
    });
    childImplementations.put(LEVEL, new SimpleObjectExpression<BytesRef>() {
        @Override
        public BytesRef value() {
            return new BytesRef(setting.getValue().toUpperCase(Locale.ENGLISH));
        }
    });

}
 

import org.apache.lucene.util.BytesRef; //導入依賴的package包/類
private static BytesRef evaluate(@Nonnull BytesRef inputStr, int beginIdx, int len) {
    final int startPos = Math.max(0, beginIdx - 1);
    if (startPos > inputStr.length - 1) {
        return EMPTY_BYTES_REF;
    }
    int endPos = inputStr.length;
    if (startPos + len < endPos) {
        endPos = startPos + len;
    }
    return substring(inputStr, startPos, endPos);
}