Example usage for java.math BigInteger ONE

Introduction

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

Prototype

BigInteger ONE

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Document

The BigInteger constant one.

Usage

From source file:com.google.uzaygezen.core.ranges.BigIntegerRange.java

static BigInteger overlap(List<BigIntegerRange> x, List<BigIntegerRange> y) {
    int n = x.size();
    Preconditions.checkArgument(y.size() == n, "x and y must have the same number of values");
    BigInteger overlap = BigInteger.ONE;
    // Stop early if overlap.signum() becomes zero.
    for (int i = 0; i < n & overlap.signum() != 0; ++i) {
        BigIntegerRange xRange = x.get(i);
        BigIntegerRange yRange = y.get(i);
        overlap = overlap.multiply(xRange.overlap(yRange));
    }/*from   w w w  . j  ava 2  s  .  co m*/
    return overlap;
}

From source file:RandomUtil.java

public static BigInteger randomBitFlip(BigInteger n) {
    if (n.equals(BigInteger.ONE))
        return BigInteger.ONE;
    if (n.equals(BigInteger.ZERO))
        return BigInteger.ZERO;

    BigInteger toRet = BigInteger.ONE;
    while (toRet.equals(BigInteger.ONE) || toRet.equals(BigInteger.ZERO)) {
        byte[] bytes = n.toByteArray();
        getInstance().random.nextBytes(bytes);
        // could allow up to maxExclusive by converting and checking value
        // but this is faster, even if it doesn't give us full range
        bytes[0] = 0;/*ww w.  j  a  va2 s.  c om*/
        toRet = new BigInteger(bytes);
    }
    return toRet;
}

From source file:com.spotify.hdfs2cass.CassandraPartitionerTest.java

@Test
public void testGetPartition() throws Exception {
    final int maxNodes = 5;

    final List<String> tokenRanges = new ArrayList<String>();

    BigInteger start = BigInteger.ZERO;
    BigInteger step = RandomPartitioner.MAXIMUM.divide(BigInteger.valueOf(maxNodes));
    for (int i = 0; i < maxNodes - 1; i++) {
        BigInteger end = start.add(step);

        tokenRanges.add(String.format("%d:%d", start, end));
        start = end.add(BigInteger.ONE);
    }/*from  w  w w  .ja  v  a  2 s. c o m*/

    tokenRanges.add(String.format("%d:0", start));

    final JobConf conf = new JobConf();
    conf.set(ClusterInfo.SPOTIFY_CASSANDRA_TOKENS_PARAM, StringUtils.join(tokenRanges, ","));
    conf.set(ClusterInfo.SPOTIFY_CASSANDRA_PARTITIONER_PARAM, "org.apache.cassandra.dht.RandomPartitioner");

    CassandraPartitioner instance = new CassandraPartitioner();
    instance.configure(conf);

    Text key = new Text("foobar");
    assertEquals(2, instance.getPartition(key, null, 5));

    key = new Text("someotherkey");
    assertEquals(1, instance.getPartition(key, null, 5));

    key = new Text("1ce5cf4b861941f4aa799ae39ac9daa4");
    assertEquals(4, instance.getPartition(key, null, 5));
}

From source file:org.apache.usergrid.persistence.cassandra.SimpleIndexBucketLocatorImpl.java

/** Get a token */
private static BigInteger initialToken(int size, int position) {
    BigInteger decValue = MINIMUM;
    if (position != 0) {
        decValue = MAXIMUM.divide(new BigInteger("" + size)).multiply(new BigInteger("" + position))
                .subtract(BigInteger.ONE);
    }//  www .  ja v  a2  s .c  om
    return decValue;
}

From source file:com.google.uzaygezen.core.BigIntegerContent.java

@Override
public boolean isOne() {
    return value.equals(BigInteger.ONE);
}

From source file:org.easycassandra.persistence.ColumnFamilyInformation.java

public BigInteger increment() {
    id = id.add(BigInteger.ONE);
    return id;
}

From source file:org.usergrid.persistence.cassandra.SimpleIndexBucketLocatorImpl.java

/**
 * Get a token//w  ww.j  a  va  2s . c o m
 * 
 * @param size
 * @param position
 * @return
 */
private static BigInteger initialToken(int size, int position) {
    BigInteger decValue = MINIMUM;
    if (position != 0)
        decValue = MAXIMUM.divide(new BigInteger("" + size)).multiply(new BigInteger("" + position))
                .subtract(BigInteger.ONE);
    return decValue;
}

From source file:cherry.foundation.type.SecureBigIntegerTest.java

@Test
public void testToString() {
    SecureBigInteger sec = plainValueOf(BigInteger.ONE);
    assertThat(sec.toString(), is("SecureBigInteger[1]"));
}

From source file:cc.redberry.core.number.NumberUtils.java

/**
 * Computes the integer square root of a number.
 *
 * @param n The number./*from   ww w .  j  av a2 s  . c  o m*/
 * @return The integer square root, i.e. the largest number whose square
 *         doesn't exceed n.
 */
public static BigInteger sqrt(BigInteger n) {
    if (n.signum() >= 0) {
        final int bitLength = n.bitLength();
        BigInteger root = BigInteger.ONE.shiftLeft(bitLength / 2);

        while (!isSqrtXXX(n, root))
            root = root.add(n.divide(root)).divide(TWO);
        return root;
    } else
        throw new ArithmeticException("square root of negative number");
}

From source file:org.eclipse.equinox.p2.cudf.solver.ParanoidOptimizationFunction.java

public List<WeightedObject<Object>> createOptimizationFunction(InstallableUnit metaIu) {
    List<WeightedObject<Object>> weightedObjects = new ArrayList<WeightedObject<Object>>();
    BigInteger weight = BigInteger.valueOf(slice.size() + 1);
    removed(weightedObjects, weight, metaIu);
    changed(weightedObjects, BigInteger.ONE, metaIu);
    if (!weightedObjects.isEmpty()) {
        return weightedObjects;
    }/*from w  ww . j  a v a2  s. c o  m*/
    return null;
}