Java Ints類代碼示例

import com.google.common.primitives.Ints; //導入依賴的package包/類
private <T> ValueExtractor provideExtractorForValue(Class<T> clazz, int target, List<String> chainOfProperties) {
    Class<?> propertyClass = clazz;
    List<Integer> indices = Lists.newArrayList();

    for (String property : chainOfProperties) {
        Field field;
        try {
            field = clazz.getDeclaredField(property);
        } catch (NoSuchFieldException e) {
            throw new InvalidQueryException(e);
        }

        PortableProperty portablePropertyAnnotation = field.getAnnotation(PortableProperty.class);
        if (portablePropertyAnnotation == null) {
            throw new InvalidQueryException("");
        }

        // TODO add support for customs codecs some day ;)
        int index = portablePropertyAnnotation.value();
        indices.add(index);
        propertyClass = field.getDeclaringClass();
    }

    return new PofExtractor<>(propertyClass, new SimplePofPath(Ints.toArray(indices)), target);
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
/**
 * Generate a key from the given data.
 *
 * @param attribute
 *          Attribute of the key to generate.
 * @param id
 *          Id of the key to generate.
 * @param version
 *          Version of the key to generate.
 * @param length
 *          Length of the key to generate.
 * @return Generated key.
 */
private static byte[] generateKey(byte[] masterSecret, String attribute, String id, int version, int length) {
  ByteArrayOutputStream metadata = new ByteArrayOutputStream();
  try {
    if (attribute != null) {
      metadata.write(Ints.toByteArray(attribute.length()));
      metadata.write(attribute.getBytes(ENCODING_CHARSET));
    }
    metadata.write(Ints.toByteArray(version));
    metadata.write(Ints.toByteArray(length));
  } catch (IOException e) { /* won't be thrown */}

  hkdf.init(new HKDFParameters(masterSecret, id.getBytes(ENCODING_CHARSET), metadata.toByteArray()));

  byte[] key = new byte[length];
  hkdf.generateBytes(key, 0, key.length);
  return key;
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
@BeforeExperiment void setUp() {
  // random integers will be generated in this range, then raised to the
  // power of (1/concentration) and floor()ed
  max = Ints.checkedCast((long) Math.pow(distinctKeys, concentration));

  cache = CacheBuilder.newBuilder()
      .concurrencyLevel(segments)
      .maximumSize(maximumSize)
      .build(
          new CacheLoader<Integer, Integer>() {
            @Override public Integer load(Integer from) {
              return (int) misses.incrementAndGet();
            }
          });

  // To start, fill up the cache.
  // Each miss both increments the counter and causes the map to grow by one,
  // so until evictions begin, the size of the map is the greatest return
  // value seen so far
  while (cache.getUnchecked(nextRandomKey()) < maximumSize) {}

  requests.set(0);
  misses.set(0);
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
/**
 * An implementation of {@link BaseGraph#edges()} defined in terms of {@link #nodes()} and {@link
 * #successors(Object)}.
 */
@Override
public Set<EndpointPair<N>> edges() {
  return new AbstractSet<EndpointPair<N>>() {
    @Override
    public UnmodifiableIterator<EndpointPair<N>> iterator() {
      return EndpointPairIterator.of(AbstractBaseGraph.this);
    }

    @Override
    public int size() {
      return Ints.saturatedCast(edgeCount());
    }

    @Override
    public boolean contains(@Nullable Object obj) {
      if (!(obj instanceof EndpointPair)) {
        return false;
      }
      EndpointPair<?> endpointPair = (EndpointPair<?>) obj;
      return isDirected() == endpointPair.isOrdered()
          && nodes().contains(endpointPair.nodeU())
          && successors(endpointPair.nodeU()).contains(endpointPair.nodeV());
    }
  };
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
public ApacheThriftMethodInvoker(
        ListeningExecutorService executorService,
        ListeningScheduledExecutorService delayService,
        TTransportFactory transportFactory,
        TProtocolFactory protocolFactory,
        Duration connectTimeout,
        Duration requestTimeout,
        Optional<HostAndPort> socksProxy,
        Optional<SSLContext> sslContext)
{
    this.executorService = requireNonNull(executorService, "executorService is null");
    this.delayService = requireNonNull(delayService, "delayService is null");
    this.transportFactory = requireNonNull(transportFactory, "transportFactory is null");
    this.protocolFactory = requireNonNull(protocolFactory, "protocolFactory is null");
    this.connectTimeoutMillis = Ints.saturatedCast(requireNonNull(connectTimeout, "connectTimeout is null").toMillis());
    this.requestTimeoutMillis = Ints.saturatedCast(requireNonNull(requestTimeout, "requestTimeout is null").toMillis());
    this.socksProxy = requireNonNull(socksProxy, "socksProxy is null");
    this.sslContext = requireNonNull(sslContext, "sslContext is null");
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
private Runnable createReadOperation(ChannelHandlerContext ctx, OperationParameters operationParameters) {
    return () -> {
        ByteBuf data = null;
        int err = 0;
        try {
            //FIXME: use FUA/sync flag correctly
            ByteBuffer bb = exportProvider.read(operationParameters.cmdOffset, Ints.checkedCast(operationParameters.cmdLength));
            data = Unpooled.wrappedBuffer(bb);
            checkReadLength(operationParameters, data);
        } catch (Exception e) {
            LOGGER.error("error during read", e);
            err = Protocol.EIO_ERROR;
        } finally {
            sendTransmissionSimpleReply(ctx, err, operationParameters.cmdHandle, data);
        }
    };
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
@Override
public int size() {
  // racy single-check idiom
  Integer result = size;
  if (result == null) {
    long total = 0;
    for (Range<C> range : ranges) {
      total += ContiguousSet.create(range, domain).size();
      if (total >= Integer.MAX_VALUE) {
        break;
      }
    }
    result = size = Ints.saturatedCast(total);
  }
  return result.intValue();
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
/**
 * Returns the string representation of an {@link InetAddress}.
 *
 * <p>For IPv4 addresses, this is identical to {@link InetAddress#getHostAddress()}, but for IPv6
 * addresses, the output follows <a href="http://tools.ietf.org/html/rfc5952">RFC 5952</a> section
 * 4. The main difference is that this method uses "::" for zero compression, while Java's version
 * uses the uncompressed form.
 *
 * <p>This method uses hexadecimal for all IPv6 addresses, including IPv4-mapped IPv6 addresses
 * such as "::c000:201". The output does not include a Scope ID.
 *
 * @param ip {@link InetAddress} to be converted to an address string
 * @return {@code String} containing the text-formatted IP address
 * @since 10.0
 */
public static String toAddrString(InetAddress ip) {
  checkNotNull(ip);
  if (ip instanceof Inet4Address) {
    // For IPv4, Java's formatting is good enough.
    return ip.getHostAddress();
  }
  checkArgument(ip instanceof Inet6Address);
  byte[] bytes = ip.getAddress();
  int[] hextets = new int[IPV6_PART_COUNT];
  for (int i = 0; i < hextets.length; i++) {
    hextets[i] = Ints.fromBytes((byte) 0, (byte) 0, bytes[2 * i], bytes[2 * i + 1]);
  }
  compressLongestRunOfZeroes(hextets);
  return hextetsToIPv6String(hextets);
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
@SuppressWarnings({"unchecked", "rawtypes"}) // NOTE: We assume the component type matches the list
private Object toArray(Class<?> componentType, List<Object> values) {
    if (componentType == boolean.class) {
        return Booleans.toArray((Collection) values);
    } else if (componentType == byte.class) {
        return Bytes.toArray((Collection) values);
    } else if (componentType == short.class) {
        return Shorts.toArray((Collection) values);
    } else if (componentType == int.class) {
        return Ints.toArray((Collection) values);
    } else if (componentType == long.class) {
        return Longs.toArray((Collection) values);
    } else if (componentType == float.class) {
        return Floats.toArray((Collection) values);
    } else if (componentType == double.class) {
        return Doubles.toArray((Collection) values);
    } else if (componentType == char.class) {
        return Chars.toArray((Collection) values);
    }
    return values.toArray((Object[]) Array.newInstance(componentType, values.size()));
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
public byte[] getProtobufData() {
    byte[] envelopeData = getEnvelope().toByteArray();
    byte[] payloadData = getPayload().toByteArray();
    int size = envelopeData.length + payloadData.length + 8;
    byte[] retval = new byte[size];
    int offset = 0;
    System.arraycopy(Ints.toByteArray(envelopeData.length), 0, retval, offset, 4);
    offset += 4;
    System.arraycopy(envelopeData, 0, retval, offset, envelopeData.length);
    offset += envelopeData.length;
    System.arraycopy(Ints.toByteArray(payloadData.length), 0, retval, offset, 4);
    offset += 4;
    System.arraycopy(payloadData, 0, retval, offset, payloadData.length);

    return retval;
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
private Message readRpcBody(ServletInputStream in,
                            Class<? extends Message> requestClass) throws Exception {
    byte chunkSize[] = new byte[4];
    in.read(chunkSize);
    int size = Ints.fromByteArray(chunkSize);
    if (size == 0) {
        return ProtobufUtil.newEmptyMessage(requestClass);
    }
    if (size > ProtobufUtil.MAX_BODY_CHUNK_SIZE) {
        String message = "Invalid body chunk size: " + size;
        throw new RpcReadException(chunkSize, in, message);
    }
    byte bodyData[] = readyFully(in, size);
    Message pbRequest = ProtobufUtil.byteArrayToProtobuf(bodyData, requestClass);
    return pbRequest;
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
@Override
protected void reBuffer() throws IOException
{
    if (offset - mem.peer >= mem.size())
        return;

    buffer = getByteBuffer(offset, Math.min(bufferSize, Ints.saturatedCast(memRemaining())));
    offset += buffer.capacity();
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
@Override
public ByteBuffer read(final long offset, final int length) throws IOException {
    read.mark(length);
    final ByteBuffer origMessage = ByteBuffer.allocate(length);
    for (Integer bucketIndex : getBuckets(offset, length)) { //eventually make parallel
        Bucket bucket = getBucketFromIndex(bucketIndex);
        final long absoluteOffsetForThisBucket = Math.max(offset, bucket.getBaseOffset());
        final int lengthForBucket = Ints.checkedCast(Math.min(bucket.getUpperBound() + 1, offset + length) - absoluteOffsetForThisBucket); //todo this threw an exception
        final int dataOffset = Ints.checkedCast(Math.max(0, bucket.getBaseOffset() - offset));
        final ByteBuffer pseudoCopy = bufferForBucket(origMessage, lengthForBucket, dataOffset);

        bucket.getBytes(pseudoCopy, absoluteOffsetForThisBucket, lengthForBucket);
    }
    return origMessage;
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
long getElement(long idx) {
    long elt = 0;
    long bitpos = ELEMENT_BITS * idx;
    int tabpos = Ints.checkedCast(bitpos / 64);
    long slotpos = bitpos % 64;
    long spillbits = (slotpos + ELEMENT_BITS) - 64;
    elt = (table[tabpos] >>> slotpos) & ELEMENT_MASK;
    if (spillbits > 0) {
        ++tabpos;
        long x = table[tabpos] & LOW_MASK(spillbits);
        elt |= x << (ELEMENT_BITS - spillbits);
    }
    return elt;
}
 

import com.google.common.primitives.Ints; //導入依賴的package包/類
public void testPercentiles_indexes_varargsAll_computeInPlace() {
  double[] dataset = Doubles.toArray(PSEUDORANDOM_DATASET);
  List<Integer> indexes = new ArrayList<Integer>();
  ImmutableMap.Builder<Integer, Double> expectedBuilder = ImmutableMap.builder();
  for (int index = 0; index <= 100; index++) {
    indexes.add(index);
    expectedBuilder.put(index, expectedLargeDatasetPercentile(index));
  }
  Random random = new Random(770683168895677741L);
  Collections.shuffle(indexes, random);
  assertQuantilesMap(expectedBuilder.build(),
      percentiles().indexes(Ints.toArray(indexes)).computeInPlace(dataset));
  assertDatasetAnyOrder(PSEUDORANDOM_DATASET, dataset);
}