Example usage for java.util SortedMap isEmpty

Introduction

In this page you can find the example usage for java.util SortedMap isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this map contains no key-value mappings.

Usage

From source file:org.jactr.core.queue.collection.PrioritizedQueue.java

/**
 * first key after afterPriority, or NaN
 * /*w  w w .ja va  2  s . co  m*/
 * @param afterPriority
 * @return
 */
synchronized public double getFirstPriorityAfter(double afterPriority) {
    SortedMap<Double, Collection<T>> submap = _backingMap.subMap(_backingMap.firstKey(), afterPriority);
    if (!submap.isEmpty())
        return submap.firstKey();
    return Double.NaN;
}

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From source file:com.precioustech.fxtrading.tradingbot.strategies.FadeTheMoveStrategy.java

public void analysePrices() {
    for (Map.Entry<TradeableInstrument<T>, Cache<DateTime, MarketDataPayLoad<T>>> entry : instrumentRecentPricesCache
            .entrySet()) {/*  w w  w.  jav a 2s  .com*/
        SortedMap<DateTime, MarketDataPayLoad<T>> sortedByDate = ImmutableSortedMap
                .copyOf(entry.getValue().asMap());
        if (sortedByDate.isEmpty()) {
            continue;
        }
        Double pipJump = calculatePipJump(sortedByDate.values(), entry.getKey());
        Double absPipJump = Math.abs(pipJump);
        if (absPipJump >= this.pipJumpCutOffCalculator.calculatePipJumpCutOff(entry.getKey())) {
            MarketDataPayLoad<T> lastPayLoad = sortedByDate.get(sortedByDate.lastKey());
            Double pip = this.instrumentService.getPipForInstrument(entry.getKey());
            double takeProfitPrice;
            double limitPrice;
            TradingSignal signal = null;
            if (Math.signum(pipJump) > 0) {// Short
                signal = TradingSignal.SHORT;
                limitPrice = lastPayLoad.getBidPrice() + tradingConfig.getFadeTheMoveDistanceToTrade() * pip;
                takeProfitPrice = limitPrice - tradingConfig.getFadeTheMovePipsDesired() * pip;
            } else {
                signal = TradingSignal.LONG;
                limitPrice = lastPayLoad.getAskPrice() - tradingConfig.getFadeTheMoveDistanceToTrade() * pip;
                takeProfitPrice = limitPrice + tradingConfig.getFadeTheMovePipsDesired() * pip;
            }
            this.orderQueue.offer(new TradingDecision<T>(entry.getKey(), signal, takeProfitPrice, 0.0,
                    limitPrice, TradingDecision.SRCDECISION.FADE_THE_MOVE));
            entry.getValue().asMap().clear();/*
                                              * clear the prices so that we do not keep
                                              * working on old decision
                                              */
        }
    }
}

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From source file:com.openkappa.rst.Classifier.java

private Container findWithPrefix(int attributeIndex, String prefix) {
    SortedMap<String, Container> prefixMap = criteria[attributeIndex].prefixMap(prefix);
    if (null == prefixMap || prefixMap.isEmpty()) {
        return fallback(attributeIndex);
    }//ww w.  j a  v a  2s .c  om
    return prefixMap.get(prefixMap.firstKey());
}

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From source file:org.vbossica.springbox.metrics.HealthCheckController.java

@RequestMapping(value = "/metrics/healthcheck", method = RequestMethod.GET)
public void process(
        @RequestParam(value = "pretty", required = false, defaultValue = "true") boolean prettyPrint,
        HttpServletResponse resp) throws IOException {
    SortedMap<String, HealthCheck.Result> results = registry.runHealthChecks();
    resp.setContentType("application/json");
    resp.setHeader("Cache-Control", "must-revalidate,no-cache,no-store");
    if (results.isEmpty()) {
        resp.setStatus(SC_NOT_IMPLEMENTED);
    } else {// w w  w.  jav  a 2  s . co  m
        resp.setStatus(isAllHealthy(results) ? SC_OK : SC_INTERNAL_SERVER_ERROR);
    }

    OutputStream output = resp.getOutputStream();
    try {
        (prettyPrint ? mapper.writerWithDefaultPrettyPrinter() : mapper.writer()).writeValue(output, results);
    } finally {
        output.close();
    }
}

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From source file:org.apache.metron.stellar.common.shell.DefaultStellarAutoCompleter.java

/**
 * Returns a list of viable candidates for auto-completion.
 * @param buffer The current buffer.// w w w.  j  a va2 s  .c  o m
 * @param opType The type of operation needing auto-completion.
 * @return Viable candidates for auto-completion.
 */
private Iterable<String> autoComplete(String buffer, final OperationType opType) {
    indexLock.readLock().lock();
    try {
        SortedMap<String, AutoCompleteType> ret = autocompleteIndex.prefixMap(buffer);
        if (ret.isEmpty()) {
            return new ArrayList<>();
        }
        return Iterables.transform(ret.entrySet(), kv -> kv.getValue().transform(opType, kv.getKey()));
    } finally {
        indexLock.readLock().unlock();
    }
}

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From source file:org.opennms.netmgt.rrd.model.RRDv3IT.java

/**
 * Test samples for multiple RRAs (2)/*from   ww  w.  j  a  v  a 2 s  . co  m*/
 *
 * @throws Exception the exception
 */
@Test
public void testSamplesMultipleRRAs2() throws Exception {
    File source = new File("src/test/resources/sample-counter-rras.xml");
    RRDv3 rrd = JaxbUtils.unmarshal(RRDv3.class, source);
    Assert.assertNotNull(rrd);
    SortedMap<Long, List<Double>> samples = rrd.generateSamples();
    Assert.assertFalse(samples.isEmpty());
    int size = rrd.getRras().stream().mapToInt(r -> r.getRows().size()).sum();
    Assert.assertEquals(size - 3 - 1, samples.size()); // There are 3 timestamps that exist in both RRAs and the last one is incomplete
}

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From source file:amazon.SignedRequestsHelper.java

/**
 * Canonicalize the query string as required by Amazon.
 * //from  w  w w  .  j a  v  a 2s  .co m
 * @param sortedParamMap    Parameter name-value pairs in lexicographical order.
 * @return                  Canonical form of query string.
 */
private String canonicalize(SortedMap<String, String> sortedParamMap) {
    if (sortedParamMap.isEmpty()) {
        return "";
    }

    StringBuffer buffer = new StringBuffer();
    Iterator<Map.Entry<String, String>> iter = sortedParamMap.entrySet().iterator();

    while (iter.hasNext()) {
        Map.Entry<String, String> kvpair = iter.next();
        buffer.append(percentEncodeRfc3986(kvpair.getKey()));
        buffer.append("=");
        buffer.append(percentEncodeRfc3986(kvpair.getValue()));
        if (iter.hasNext()) {
            buffer.append("&");
        }
    }
    String cannoical = buffer.toString();
    return cannoical;
}

---

From source file:model.connection.amazon.SignedRequestsHelper.java

/**
 * Canonicalize the query string as required by Amazon.
 * /*w  ww .  j a  v  a  2  s.c om*/
 * @param sortedParamMap    Parameter name-value pairs in lexicographical order.
 * @return                  Canonical form of query string.
 */
private String canonicalize(SortedMap<String, String> sortedParamMap) {
    if (sortedParamMap.isEmpty()) {
        return "";
    }

    StringBuffer buffer = new StringBuffer();
    Iterator<Map.Entry<String, String>> iter = sortedParamMap.entrySet().iterator();

    while (iter.hasNext()) {
        Map.Entry<String, String> kvpair = iter.next();
        buffer.append(percentEncodeRfc3986(kvpair.getKey()));
        buffer.append("=");
        buffer.append(percentEncodeRfc3986(kvpair.getValue()));
        if (iter.hasNext()) {
            buffer.append("&");
        }
    }
    String cannonical = buffer.toString();
    return cannonical;
}

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From source file:com.espertech.esper.schedule.SchedulingServiceImpl.java

public synchronized final void evaluate(Collection<ScheduleHandle> handles) {
    // Get the values on or before the current time - to get those that are exactly on the
    // current time we just add one to the current time for getting the head map
    SortedMap<Long, SortedMap<ScheduleSlot, ScheduleHandle>> headMap = timeHandleMap.headMap(currentTime + 1);

    if (headMap.isEmpty()) {
        return;//from  w  w  w  . j av a2s .  c  o m
    }

    // First determine all triggers to shoot
    List<Long> removeKeys = new ArrayList<Long>();
    for (Map.Entry<Long, SortedMap<ScheduleSlot, ScheduleHandle>> entry : headMap.entrySet()) {
        Long key = entry.getKey();
        SortedMap<ScheduleSlot, ScheduleHandle> value = entry.getValue();
        removeKeys.add(key);
        for (ScheduleHandle handle : value.values()) {
            handles.add(handle);
        }
    }

    // Next remove all handles
    for (Map.Entry<Long, SortedMap<ScheduleSlot, ScheduleHandle>> entry : headMap.entrySet()) {
        for (ScheduleHandle handle : entry.getValue().values()) {
            handleSetMap.remove(handle);
        }
    }

    // Remove all triggered msec values
    for (Long key : removeKeys) {
        timeHandleMap.remove(key);
    }
}

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From source file:gridool.routing.strategy.ConsistentHash.java

public GridNode get(@Nonnull byte[] key) {
    if (circle.isEmpty()) {
        return null;
    }//from ww  w  .  j  a va  2s .c  o  m
    Long hash = hashFunction.hash(key);
    GridNode node = circle.get(hash);
    if (node != null) {
        return node;
    }
    SortedMap<Long, GridNode> tailMap = circle.tailMap(hash);
    hash = tailMap.isEmpty() ? circle.firstKey() : tailMap.firstKey();
    return circle.get(hash);
}

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