Example usage for com.google.common.collect Maps newHashMapWithExpectedSize

Introduction

In this page you can find the example usage for com.google.common.collect Maps newHashMapWithExpectedSize.

Prototype

public static <K, V> HashMap<K, V> newHashMapWithExpectedSize(int expectedSize) 

Source Link

Document

Creates a HashMap instance, with a high enough "initial capacity" that it should hold expectedSize elements without growth.

Usage

From source file:org.apache.druid.query.topn.TopNLexicographicResultBuilder.java

@Override
public TopNResultBuilder addEntry(Comparable dimValueObj, Object dimValIndex, Object[] metricVals) {
    final String dimValue = Objects.toString(dimValueObj, null);
    final Map<String, Object> metricValues = Maps.newHashMapWithExpectedSize(metricVals.length + 1);

    if (shouldAdd(dimValue)) {
        metricValues.put(dimSpec.getOutputName(), dimValueObj);
        final int extra = metricVals.length % LOOP_UNROLL_COUNT;
        switch (extra) {
        case 7:/*from w  ww  .  ja v  a2  s  .c  o  m*/
            metricValues.put(aggFactoryNames[6], metricVals[6]);
            // fall through
        case 6:
            metricValues.put(aggFactoryNames[5], metricVals[5]);
            // fall through
        case 5:
            metricValues.put(aggFactoryNames[4], metricVals[4]);
            // fall through
        case 4:
            metricValues.put(aggFactoryNames[3], metricVals[3]);
            // fall through
        case 3:
            metricValues.put(aggFactoryNames[2], metricVals[2]);
            // fall through
        case 2:
            metricValues.put(aggFactoryNames[1], metricVals[1]);
            // fall through
        case 1:
            metricValues.put(aggFactoryNames[0], metricVals[0]);
        }
        for (int i = extra; i < metricVals.length; i += LOOP_UNROLL_COUNT) {
            metricValues.put(aggFactoryNames[i + 0], metricVals[i + 0]);
            metricValues.put(aggFactoryNames[i + 1], metricVals[i + 1]);
            metricValues.put(aggFactoryNames[i + 2], metricVals[i + 2]);
            metricValues.put(aggFactoryNames[i + 3], metricVals[i + 3]);
            metricValues.put(aggFactoryNames[i + 4], metricVals[i + 4]);
            metricValues.put(aggFactoryNames[i + 5], metricVals[i + 5]);
            metricValues.put(aggFactoryNames[i + 6], metricVals[i + 6]);
            metricValues.put(aggFactoryNames[i + 7], metricVals[i + 7]);
        }

        pQueue.add(new DimValHolder.Builder().withDimValue(dimValue).withMetricValues(metricValues).build());
        if (pQueue.size() > threshold) {
            pQueue.poll();
        }
    }

    return this;
}

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From source file:org.sonar.db.metric.MetricDao.java

public List<MetricDto> selectEnabled(DbSession session, @Nullable Boolean isCustom, int offset, int limit) {
    Map<String, Object> properties = Maps.newHashMapWithExpectedSize(1);
    if (isCustom != null) {
        properties.put("isCustom", isCustom);
    }//from w w w. ja v a2 s. c  o  m

    return mapper(session).selectAllEnabled(properties, new RowBounds(offset, limit));
}

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From source file:org.matsim.contrib.taxi.optimizer.rules.IdleTaxiZonalRegistry.java

public IdleTaxiZonalRegistry(ZonalSystem zonalSystem, ScheduleInquiry scheduleInquiry) {
    this.scheduleInquiry = scheduleInquiry;

    this.zonalSystem = zonalSystem;
    zonesSortedByDistance = ZonalSystems.initZonesByDistance(zonalSystem.getZones());

    vehiclesInZones = Maps.newHashMapWithExpectedSize(zonalSystem.getZones().size());
    for (Id<Zone> id : zonalSystem.getZones().keySet()) {
        vehiclesInZones.put(id, new HashMap<Id<Vehicle>, Vehicle>());
    }/*from   w ww.j  a v  a  2 s . c o  m*/
}

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From source file:org.apache.phoenix.util.ReadOnlyProps.java

private ReadOnlyProps(ReadOnlyProps defaultProps, Properties overrides) {
    Map<String, String> combinedProps = Maps
            .newHashMapWithExpectedSize(defaultProps.props.size() + overrides.size());
    combinedProps.putAll(defaultProps.props);
    for (Entry<Object, Object> entry : overrides.entrySet()) {
        String key = entry.getKey().toString();
        String value = entry.getValue().toString();
        combinedProps.put(key, value);//  ww  w . ja v a 2  s .  c  om
    }
    this.props = ImmutableMap.copyOf(combinedProps);
}

---

From source file:com.viadeo.kasper.core.id.AbstractSimpleConverter.java

@Override
public Map<ID, ID> convert(final Collection<ID> ids) {
    final Map<ID, ID> transformedIdToIds = Maps.newHashMapWithExpectedSize(ids.size());

    for (final ID id : ids) {
        transformedIdToIds.put(id, convert(id));
    }/*from w w w .  ja  v a 2 s. c om*/

    return transformedIdToIds;
}

---

From source file:org.apache.kylin.cube.util.CubingUtils.java

public static Map<Long, HLLCounter> sampling(CubeDesc cubeDesc, IJoinedFlatTableDesc flatDescIn,
        Iterable<List<String>> streams) {
    final CubeJoinedFlatTableEnrich flatDesc = new CubeJoinedFlatTableEnrich(flatDescIn, cubeDesc);
    final int rowkeyLength = cubeDesc.getRowkey().getRowKeyColumns().length;
    final List<Long> allCuboidIds = new CuboidScheduler(cubeDesc).getAllCuboidIds();
    final long baseCuboidId = Cuboid.getBaseCuboidId(cubeDesc);
    final Map<Long, Integer[]> allCuboidsBitSet = Maps.newHashMap();

    Lists.transform(allCuboidIds, new Function<Long, Integer[]>() {
        @Nullable/* ww  w.  j  av  a2  s  .  c  o  m*/
        @Override
        public Integer[] apply(@Nullable Long cuboidId) {
            Integer[] result = new Integer[Long.bitCount(cuboidId)];

            long mask = Long.highestOneBit(baseCuboidId);
            int position = 0;
            for (int i = 0; i < rowkeyLength; i++) {
                if ((mask & cuboidId) > 0) {
                    result[position] = i;
                    position++;
                }
                mask = mask >> 1;
            }
            return result;
        }
    });
    final Map<Long, HLLCounter> result = Maps.newHashMapWithExpectedSize(allCuboidIds.size());
    for (Long cuboidId : allCuboidIds) {
        result.put(cuboidId, new HLLCounter(cubeDesc.getConfig().getCubeStatsHLLPrecision()));
        Integer[] cuboidBitSet = new Integer[Long.bitCount(cuboidId)];

        long mask = Long.highestOneBit(baseCuboidId);
        int position = 0;
        for (int i = 0; i < rowkeyLength; i++) {
            if ((mask & cuboidId) > 0) {
                cuboidBitSet[position] = i;
                position++;
            }
            mask = mask >> 1;
        }
        allCuboidsBitSet.put(cuboidId, cuboidBitSet);
    }

    HashFunction hf = Hashing.murmur3_32();
    ByteArray[] row_hashcodes = new ByteArray[rowkeyLength];
    for (int i = 0; i < rowkeyLength; i++) {
        row_hashcodes[i] = new ByteArray();
    }
    for (List<String> row : streams) {
        //generate hash for each row key column
        for (int i = 0; i < rowkeyLength; i++) {
            Hasher hc = hf.newHasher();
            final String cell = row.get(flatDesc.getRowKeyColumnIndexes()[i]);
            if (cell != null) {
                row_hashcodes[i].set(hc.putString(cell).hash().asBytes());
            } else {
                row_hashcodes[i].set(hc.putInt(0).hash().asBytes());
            }
        }

        for (Map.Entry<Long, HLLCounter> longHyperLogLogPlusCounterNewEntry : result.entrySet()) {
            Long cuboidId = longHyperLogLogPlusCounterNewEntry.getKey();
            HLLCounter counter = longHyperLogLogPlusCounterNewEntry.getValue();
            Hasher hc = hf.newHasher();
            final Integer[] cuboidBitSet = allCuboidsBitSet.get(cuboidId);
            for (int position = 0; position < cuboidBitSet.length; position++) {
                hc.putBytes(row_hashcodes[cuboidBitSet[position]].array());
            }
            counter.add(hc.hash().asBytes());
        }
    }
    return result;
}

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From source file:com.opengamma.analytics.financial.forex.calculator.PV01ForexCalculator.java

private Map<String, Double> visit(final Map<String, List<DoublesPair>> curveSensitivities) {
    ArgumentChecker.notNull(curveSensitivities, "curve sensitivities");
    final Map<String, Double> result = Maps.newHashMapWithExpectedSize(curveSensitivities.size());
    for (final Map.Entry<String, List<DoublesPair>> entry : curveSensitivities.entrySet()) {
        final String name = entry.getKey();
        final double sum = sumListPair(entry.getValue()) * ONE_BASIS_POINT;
        result.put(name, sum);//w  ww  . java  2 s  .c  o m
    }
    return result;
}

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From source file:com.arpnetworking.tsdaggregator.sources.MappingSource.java

private MappingSource(final Builder builder) {
    super(builder);
    _source = builder._source;/*w ww.  j av a  2  s .  c  o m*/

    _findAndReplace = Maps.newHashMapWithExpectedSize(builder._findAndReplace.size());
    for (final Map.Entry<String, ? extends List<String>> entry : builder._findAndReplace.entrySet()) {
        _findAndReplace.put(Pattern.compile(entry.getKey()), ImmutableList.<String>copyOf(entry.getValue()));
    }

    _source.attach(new MappingObserver(this, _findAndReplace));
}

---

From source file:com.kingen.web.SkillController.java

/**
 * ?grid//from   ww  w.  j  ava  2 s  .  co m
 */
//?jsonstring ?jsonObject
@RequestMapping(value = "/treeData")
public @ResponseBody Object data(Page<SkillCat> page, HttpServletResponse response) {

    List<SkillCat> all = service.list();
    List<TreeNode> allConverted = BeanMapper.mapList(all, TreeNode.class);

    Map<String, Object> json = Maps.newHashMapWithExpectedSize(1);
    //?chidlren,return toComplexJsonString(offices);?.jsonString???????
    json.put("children", TreeConverter.toComplexTree(allConverted));
    return json;

}

---

From source file:org.novelang.build.unicode.UnicodeNamesTextReader.java

Map<Character, String> extractNames(final String names) throws IOException {
    final Map<Character, String> characterToNameMap = Maps.newHashMapWithExpectedSize(256 * 256);
    final Matcher matcher = PROPERTY_LINE_PATTERN.matcher(names);
    int limiter = 0;

    while (matcher.find() /*&& limiter < 150*/ ) {
        final String code = matcher.group(1);
        if (code.length() == 4) {
            final String name;
            final String casualName = matcher.group(2);
            if ("<control>".equals(casualName)) {
                final String controlName = matcher.group(3);
                name = controlName;/*  ww w. j  av a2 s .co m*/
            } else {
                name = casualName;
            }

            final int codeAsInt = Integer.parseInt(code, 16); // Be confident!
            final Character character = (char) codeAsInt;
            final String existing = characterToNameMap.get(character);
            if (existing == null && !"".equals(name)) {
                // Retain first definition, seems that most interesting appear first.
                characterToNameMap.put(character, name);
                //          LOG.info( "Added " + ( ( int ) character ) + " as '" + name + "'" +
                //                  ( character != limiter ? " OOOPS!" : "" )
                //          ) ;
            }
        }
        limiter++;
    }
    return ImmutableMap.copyOf(characterToNameMap);
}

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