Example usage for java.util HashMap merge

Introduction

In this page you can find the example usage for java.util HashMap merge.

Prototype

@Override
public V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) 

Source Link

Document

This method will, on a best-effort basis, throw a ConcurrentModificationException if it is detected that the remapping function modifies this map during computation.

Usage

From source file:com.adobe.acs.commons.wcm.impl.PropertyMergePostProcessor.java

private void trackMergeParameters(final HashMap<String, Set<String>> mapping, final String source,
        String destination) {/*from w  ww  . j  av a 2  s  .  c o  m*/
    mapping.merge(destination, new HashSet<>(), (a, b) -> a).add(source);
}

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From source file:org.briljantframework.data.Collectors.java

public static <T> Collector<T, ?, Vector> valueCounts() {
    return Collector.of(HashMap::new, (map, t) -> map.compute(t, (v, c) -> c == null ? 1 : c + 1),
            new BinaryOperator<HashMap<T, Integer>>() {
                @Override/*from w  ww . j av a 2  s  .  c om*/
                public HashMap<T, Integer> apply(HashMap<T, Integer> left, HashMap<T, Integer> right) {
                    right.forEach((k, v) -> left.merge(k, v, (Integer o, Integer n) -> o == null ? n : o + n));
                    return left;
                }
            }, (map) -> {
                Vector.Builder b = new TypeInferenceVectorBuilder();
                for (Map.Entry<T, Integer> e : map.entrySet()) {
                    b.set(e.getKey(), e.getValue());
                }
                return b.build();
            }, Collector.Characteristics.UNORDERED);
}

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From source file:org.sleuthkit.autopsy.timeline.ui.detailview.EventNodeBase.java

/**
 * defer tooltip content creation till needed, this had a surprisingly large
 * impact on speed of loading the chart/*from   w w w  .  jav a  2  s  . com*/
 */
@NbBundle.Messages({ "# {0} - counts", "# {1} - event type", "# {2} - description", "# {3} - start date/time",
        "# {4} - end date/time", "EventNodeBase.tooltip.text={0} {1} events\n{2}\nbetween\t{3}\nand   \t{4}",
        "EventNodeBase.toolTip.loading2=loading tooltip", "# {0} - hash set count string",
        "EventNodeBase.toolTip.hashSetHits=\n\nHash Set Hits\n{0}", "# {0} - tag count string",
        "EventNodeBase.toolTip.tags=\n\nTags\n{0}" })
@ThreadConfined(type = ThreadConfined.ThreadType.JFX)
void installTooltip() {
    if (tooltip.getText().equalsIgnoreCase(Bundle.EventBundleNodeBase_toolTip_loading())) {
        final Task<String> tooltTipTask = new Task<String>() {
            {
                updateTitle(Bundle.EventNodeBase_toolTip_loading2());
            }

            @Override
            protected String call() throws Exception {
                HashMap<String, Long> hashSetCounts = new HashMap<>();
                if (tlEvent.getEventIDsWithHashHits().isEmpty() == false) {
                    try {
                        //TODO:push this to DB
                        for (SingleEvent tle : eventsModel.getEventsById(tlEvent.getEventIDsWithHashHits())) {
                            Set<String> hashSetNames = sleuthkitCase.getAbstractFileById(tle.getFileID())
                                    .getHashSetNames();
                            for (String hashSetName : hashSetNames) {
                                hashSetCounts.merge(hashSetName, 1L, Long::sum);
                            }
                        }
                    } catch (TskCoreException ex) {
                        LOGGER.log(Level.SEVERE, "Error getting hashset hit info for event.", ex); //NON-NLS
                    }
                }
                String hashSetCountsString = hashSetCounts.entrySet().stream()
                        .map((Map.Entry<String, Long> t) -> t.getKey() + " : " + t.getValue())
                        .collect(Collectors.joining("\n"));

                Map<String, Long> tagCounts = new HashMap<>();
                if (tlEvent.getEventIDsWithTags().isEmpty() == false) {
                    tagCounts.putAll(eventsModel.getTagCountsByTagName(tlEvent.getEventIDsWithTags()));
                }
                String tagCountsString = tagCounts.entrySet().stream()
                        .map((Map.Entry<String, Long> t) -> t.getKey() + " : " + t.getValue())
                        .collect(Collectors.joining("\n"));

                return Bundle.EventNodeBase_tooltip_text(getEventIDs().size(), getEventType(), getDescription(),
                        TimeLineController.getZonedFormatter().print(getStartMillis()),
                        TimeLineController.getZonedFormatter().print(getEndMillis() + 1000))
                        + (hashSetCountsString.isEmpty() ? ""
                                : Bundle.EventNodeBase_toolTip_hashSetHits(hashSetCountsString))
                        + (tagCountsString.isEmpty() ? "" : Bundle.EventNodeBase_toolTip_tags(tagCountsString));
            }

            @Override
            protected void succeeded() {
                super.succeeded();
                try {
                    tooltip.setText(get());
                    tooltip.setGraphic(null);
                } catch (InterruptedException | ExecutionException ex) {
                    LOGGER.log(Level.SEVERE, "Tooltip generation failed.", ex); //NON-NLS
                }
            }
        };
        new Thread(tooltTipTask).start();
        chartLane.getController().monitorTask(tooltTipTask);
    }
}

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