Example usage for java.math BigInteger ZERO

Introduction

In this page you can find the example usage for java.math BigInteger ZERO.

Prototype

BigInteger ZERO

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Document

The BigInteger constant zero.

Usage

From source file:org.stem.domain.DHT.java

public int getSection(byte[] keyBytes) {
    BigInteger token = new BigInteger(new String(Hex.encodeHex(keyBytes)), 16);
    BigInteger sectionSize = capacity.divide(BigInteger.valueOf(sections));

    int quotient = token.divide(sectionSize).intValue();
    BigInteger mod = token.mod(sectionSize);
    int index;/* w  w  w. j  a v a  2 s .c  om*/
    if (quotient == 0)
        index = 0;
    else if (mod.equals(BigInteger.ZERO))
        index = Math.max(quotient - 1, 0);
    else
        index = Math.max(quotient, 0);

    if (index >= sections) {
        return sections - 1;
    }

    return index;
}

From source file:com.offbynull.peernetic.common.identification.IdGenerator.java

/**
 * Constructs a {@link DefaultIdGenerator} object using a {@link Random} as its underlying source.
 * @param random random number generator (should be a {@link SecureRandom} instance in most cases)
 * @param limit maximum value the id generated can be
 * @throws NullPointerException if any arguments are {@code null}
 * @throws IllegalArgumentException if limit is 0
 *///from  w  w w .j a  va  2  s  .  c  om
public IdGenerator(Random random, byte[] limit) {
    Validate.notNull(random);
    Validate.notNull(limit);
    Validate.isTrue(limit.length > 0 && !new BigInteger(1, limit).equals(BigInteger.ZERO));
    this.random = random;
    this.limit = Arrays.copyOf(limit, limit.length);
}

From source file:co.rsk.remasc.RemascStorageProviderTest.java

@Test
public void getDefautRewardBalance() {
    String accountAddress = randomAddress();
    Repository repository = new RepositoryImpl();

    RemascStorageProvider provider = new RemascStorageProvider(repository, accountAddress);

    Assert.assertEquals(BigInteger.ZERO, provider.getRewardBalance());
}

From source file:me.ferrybig.javacoding.webmapper.test.session.DefaultDataStorageTest.java

@Test
public void getDataAsChoosesCorrectBackendTypeTest() {
    List<Object> list = new ArrayList<>();
    list.add(new Object());
    list.add(BigInteger.ZERO);
    list.add("string");
    list.add(Boolean.FALSE);/*from  w  ww . j av a 2 s.c o m*/
    list.add(new JSONObject());
    data.setData(list);
    assertEquals("string", extr(data.getDataAs(String.class)));
}

From source file:com.impetus.kundera.utils.NumericUtils.java

/**
 *  Check if zero/*  w w  w.  ja  va  2 s .c om*/
 * @param value        value string
 * @param valueClazz   value class 
 * @return             
 */
public static final boolean checkIfZero(String value, Class valueClazz) {
    boolean returnValue = false;
    if (value != null && NumberUtils.isNumber(value) && numberTypes.get(valueClazz) != null) {
        switch (numberTypes.get(valueClazz)) {

        case INTEGER:
            returnValue = Integer.parseInt(value) == (NumberUtils.INTEGER_ZERO);
            break;

        case FLOAT:
            returnValue = Float.parseFloat(value) == (NumberUtils.FLOAT_ZERO);
            break;

        case LONG:
            returnValue = Long.parseLong(value) == (NumberUtils.LONG_ZERO);
            break;

        case BIGDECIMAL:
            returnValue = new BigDecimal(value) == (BigDecimal.ZERO);
            break;

        case BIGINTEGER:
            returnValue = new BigInteger(value) == (BigInteger.ZERO);
            break;

        case SHORT:
            returnValue = new Short(value) == (NumberUtils.SHORT_ZERO);
            break;
        }
    }

    return returnValue;
}

From source file:Main.java

public static String encodeBase58(byte[] input) {
    if (input == null) {
        return null;
    }//from w ww . ja  va2  s. com
    StringBuilder str = new StringBuilder((input.length * 350) / 256 + 1);
    BigInteger bn = new BigInteger(1, input);
    long rem;
    while (true) {
        BigInteger[] divideAndRemainder = bn.divideAndRemainder(BASE58_CHUNK_MOD);
        bn = divideAndRemainder[0];
        rem = divideAndRemainder[1].longValue();
        if (bn.compareTo(BigInteger.ZERO) == 0) {
            break;
        }
        for (int i = 0; i < BASE58_CHUNK_DIGITS; i++) {
            str.append(BASE58[(int) (rem % 58)]);
            rem /= 58;
        }
    }
    while (rem != 0) {
        str.append(BASE58[(int) (rem % 58)]);
        rem /= 58;
    }
    str.reverse();
    int nLeadingZeros = 0;
    while (nLeadingZeros < input.length && input[nLeadingZeros] == 0) {
        str.insert(0, BASE58[0]);
        nLeadingZeros++;
    }
    return str.toString();
}

From source file:ID.java

public static String getHexString(byte[] bytes) {
    // This method cannot change even if it's wrong.
    BigInteger bigInteger = BigInteger.ZERO;
    int shift = 0;
    for (int i = bytes.length; --i >= 0;) {
        BigInteger contrib = BigInteger.valueOf(bytes[i] & 0xFF);
        contrib = contrib.shiftLeft(shift);
        bigInteger = bigInteger.add(contrib);
        shift += 8;//from   ww  w. j ava 2s .  co m
    }
    return bigInteger.toString(16).toUpperCase();
}

From source file:com.nearinfinity.honeycomb.hbase.bulkload.FieldParser.java

/**
 * Try to parse a string into a byte string based on a column type.
 *
 * @param val    String value/*from   w w w . ja  v a2  s.c  o  m*/
 * @param schema Column schema to base value parsing on.
 * @return Byte string
 * @throws ParseException The string value could not be parsed into the column type.
 */
public static ByteBuffer parse(String val, ColumnSchema schema) throws ParseException {
    checkNotNull(val, "Should not be parsing null. Something went terribly wrong.");
    checkNotNull(schema, "Column metadata is null.");

    ColumnType type = schema.getType();

    if (val.length() == 0 && type != ColumnType.STRING && type != ColumnType.BINARY) {
        if (schema.getIsNullable()) {
            return null;
        }

        throw new IllegalArgumentException(
                "Expected a value for a" + " non-null SQL column, but no value was given.");
    }

    switch (type) {
    case LONG:
        return ByteBuffer.wrap(Longs.toByteArray(Long.parseLong(val)));
    case ULONG:
        BigInteger n = new BigInteger(val);
        if (n.compareTo(BigInteger.ZERO) == -1) {
            throw new IllegalArgumentException("negative value provided for unsigned column. value: " + val);
        }
        return ByteBuffer.wrap(Longs.toByteArray(n.longValue()));
    case DOUBLE:
        return ByteBuffer.wrap(Bytes.toBytes(Double.parseDouble(val)));
    case DATE:
        return extractDate(val, "yyyy-MM-dd", "yyyy-MM-dd", "yyyy/MM/dd", "yyyy.MM.dd", "yyyyMMdd");
    case TIME:
        return extractDate(val, "HH:mm:ss", "HH:mm:ss", "HHmmss");
    case DATETIME:
        return extractDate(val, "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm:ss", "yyyy/MM/dd HH:mm:ss",
                "yyyy.MM.dd HH:mm:ss", "yyyyMMdd HHmmss");
    case DECIMAL:
        return extractDecimal(val, schema.getPrecision(), schema.getScale());
    case STRING:
    case BINARY:
    default:
        return ByteBuffer.wrap(val.getBytes(Charset.forName("UTF-8")));
    }
}

From source file:com.basho.riak.client.itest.ITestStats.java

@Test
public void testDeserializer() throws IOException {
    NodeStats.UndefinedStatDeserializer usd = new NodeStats.UndefinedStatDeserializer();
    SimpleModule module = new SimpleModule("UndefinedStatDeserializer", new Version(1, 0, 0, null, null, null));
    module.addDeserializer(BigInteger.class, usd);

    String json = "{\"vnode_gets\":\"deprecated\",\"vnode_gets_total\":12345678}";

    ObjectMapper mapper = new ObjectMapper();
    mapper.registerModule(module);//from www  .  ja  va 2  s  .  c  o  m
    NodeStats stats = mapper.readValue(json, NodeStats.class);
    assertEquals(stats.vnodeGets(), BigInteger.ZERO);
    assertEquals(stats.vnodeGetsTotal(), BigInteger.valueOf(12345678));

}

From source file:com.redhat.lightblue.metadata.types.BigIntegerTypeTest.java

@Test
public void testToJson() {
    JsonNodeFactory jsonNodeFactory = new JsonNodeFactory(true);
    JsonNode jsonNode = bigIntegerType.toJson(jsonNodeFactory, BigInteger.ZERO);
    assertTrue(new BigInteger(jsonNode.asText()).equals(BigInteger.ZERO));
}