Example usage for org.apache.commons.math.random RandomData nextLong

Introduction

In this page you can find the example usage for org.apache.commons.math.random RandomData nextLong.

Prototype

long nextLong(long lower, long upper);

Source Link

Document

Generates a uniformly distributed random long integer between lower and upper (endpoints included).

Usage

From source file:com.milaboratory.util.MathTest.java

@Test
public void testBinomialLogBig() throws Exception {
    RandomData rdg = new RandomDataImpl(new Well19937c());
    long n, k;/*from www .  j ava  2  s  . c  o  m*/
    double func, exact, avrg;
    for (int i = 0; i < 5000; ++i) {
        n = rdg.nextLong(1, 10000);
        k = rdg.nextLong(0, n);
        func = Math.binomialCoefficientLog(n, k);
        exact = exactBinomialCoefficientLog(n, k);
        avrg = (func + exact) / 2;
        assertTrue(func == exact || (java.lang.Math.abs(func - exact) / avrg) <= .001);
    }
}

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From source file:com.milaboratory.util.MathTest.java

@Test
public void testBinomialLog() throws Exception {
    RandomData rdg = new RandomDataImpl(new Well19937c());
    long n, k;/*from   w  ww.  j  a  v  a 2 s  . c o m*/
    double func, exact, avrg;
    for (int i = 0; i < 100000; ++i) {
        n = rdg.nextLong(1, 100);
        k = rdg.nextLong(0, n);
        func = Math.binomialCoefficientLog(n, k);
        exact = exactBinomialCoefficientLog(n, k);
        avrg = (func + exact) / 2;
        assertTrue(func == exact || (java.lang.Math.abs(func - exact) / avrg) <= .001);
    }
}

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From source file:org.apache.accumulo.test.randomwalk.concurrent.Config.java

private void changeTableSetting(RandomData random, State state, Environment env, Properties props)
        throws Exception {
    // pick a random property
    int choice = random.nextInt(0, tableSettings.length - 1);
    Setting setting = tableSettings[choice];

    // pick a random table
    SortedSet<String> tables = env.getConnector().tableOperations().list().tailSet("ctt").headSet("ctu");
    if (tables.isEmpty())
        return;//www. jav a2s  . c o  m
    String table = random.nextSample(tables, 1)[0].toString();

    // generate a random value
    long newValue = random.nextLong(setting.min, setting.max);
    state.set(LAST_TABLE_SETTING, table + "," + choice);
    log.debug("Setting " + setting.property.getKey() + " on table " + table + " to " + newValue);
    try {
        env.getConnector().tableOperations().setProperty(table, setting.property.getKey(), "" + newValue);
    } catch (AccumuloException ex) {
        if (ex.getCause() instanceof ThriftTableOperationException) {
            ThriftTableOperationException ttoe = (ThriftTableOperationException) ex.getCause();
            if (ttoe.type == TableOperationExceptionType.NOTFOUND)
                return;
        }
        throw ex;
    }
}

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From source file:org.apache.accumulo.test.randomwalk.concurrent.Config.java

private void changeNamespaceSetting(RandomData random, State state, Environment env, Properties props)
        throws Exception {
    // pick a random property
    int choice = random.nextInt(0, tableSettings.length - 1);
    Setting setting = tableSettings[choice];

    // pick a random table
    SortedSet<String> namespaces = env.getConnector().namespaceOperations().list().tailSet("nspc")
            .headSet("nspd");
    if (namespaces.isEmpty())
        return;//from w  w  w. j a v  a  2  s  . c  o m
    String namespace = random.nextSample(namespaces, 1)[0].toString();

    // generate a random value
    long newValue = random.nextLong(setting.min, setting.max);
    state.set(LAST_NAMESPACE_SETTING, namespace + "," + choice);
    log.debug("Setting " + setting.property.getKey() + " on namespace " + namespace + " to " + newValue);
    try {
        env.getConnector().namespaceOperations().setProperty(namespace, setting.property.getKey(),
                "" + newValue);
    } catch (AccumuloException ex) {
        if (ex.getCause() instanceof ThriftTableOperationException) {
            ThriftTableOperationException ttoe = (ThriftTableOperationException) ex.getCause();
            if (ttoe.type == TableOperationExceptionType.NAMESPACE_NOTFOUND)
                return;
        }
        throw ex;
    }
}

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From source file:org.apache.accumulo.test.randomwalk.concurrent.Config.java

private void changeSetting(RandomData random, State state, Environment env, Properties props) throws Exception {
    // pick a random property
    int choice = random.nextInt(0, settings.length - 1);
    Setting setting = settings[choice];//from   w  ww . j  a  va 2s.  co m
    // generate a random value
    long newValue = random.nextLong(setting.min, setting.max);
    state.set(LAST_SETTING, "" + choice);
    log.debug("Setting " + setting.property.getKey() + " to " + newValue);
    env.getConnector().instanceOperations().setProperty(setting.property.getKey(), "" + newValue);
}

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From source file:org.datacleaner.user.UsageLogger.java

private long getSessionId() {
    if (sessionId == -1) {
        RandomData rd = new RandomDataImpl();
        sessionId = rd.nextLong(1, Long.MAX_VALUE);
    }/*from   w  w  w.ja v  a  2s . c om*/
    return sessionId;
}

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From source file:org.datacleaner.user.UsageLogger.java

private long getDeploymentId(Map<String, String> additionalProperties) {
    String deploymentId = additionalProperties.get("datacleaner.usage.deployment_id");
    if (Strings.isNullOrEmpty(deploymentId)) {
        RandomData rd = new RandomDataImpl();
        deploymentId = "" + rd.nextLong(1, Long.MAX_VALUE);
        additionalProperties.put("datacleaner.usage.deployment_id", deploymentId);
    }/*w ww .ja  v  a  2s. c  o  m*/
    try {
        return Long.parseLong(deploymentId);
    } catch (NumberFormatException e) {
        return -1l;
    }
}

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From source file:org.tolven.gen.model.Matcher.java

/**
 * Calculate a reasonable event time given that this matcher matched. 
 * It probably can't be earlier than the DOB+lowAge and the lesser of DOB+highAge 
 * and now. It also can't be before the previous occurance of this event + minimum spacing.
 * @param patient//from w w w  . ja v  a  2 s. c om
 * @return
 */
public Date getEventTime(GenMedical patient, RandomData rng, Date minTime) {
    Date eventLow = getEarliest(patient);
    if (minTime != null && minTime.after(eventLow))
        eventLow = minTime;
    Date eventHigh = getLatest(patient);
    Date eventNow = patient.getNow();
    long msHighOffset;
    if (eventHigh.after(eventNow))
        msHighOffset = eventNow.getTime() - eventLow.getTime();
    else
        msHighOffset = eventHigh.getTime() - eventLow.getTime();
    Date eventTime;
    if (msHighOffset > 0) {
        long msOffset = rng.nextLong(eventLow.getTime(), eventLow.getTime() + msHighOffset);
        eventTime = new Date(msOffset);
    } else {
        eventTime = eventLow;
    }
    return eventTime;
}

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