Java Code Examples for java.util.Collections#emptyListIterator()
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java.util.Collections#emptyListIterator() .
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Example 1
Source Project: ixa-pipe-pos File: LemmaSampleEventStream.java License: Apache License 2.0 | 6 votes |
protected Iterator<Event> createEvents(LemmaSample sample) { if (sample != null) { List<Event> events = new ArrayList<Event>(); String[] toksArray = sample.getTokens(); String[] tagsArray = sample.getTags(); String[] predsArray = sample.getLemmas(); for (int ei = 0, el = sample.getTokens().length; ei < el; ei++) { events.add(new Event(predsArray[ei], contextGenerator.getContext(ei,toksArray,tagsArray,predsArray))); } return events.iterator(); } else { return Collections.emptyListIterator(); } }
Example 2
Source Project: levelup-java-examples File: ReturnEmptyListIterator.java License: Apache License 2.0 | 6 votes |
/** * Used for exception example */ @SuppressWarnings("unused") private void return_empty_list_iterator_java_exception () { DomainObject domain = null; // dao populate domain ListIterator<String> strings; if (domain != null && domain.getStrings() != null && domain.getStrings().hasNext()) { strings = domain.getStrings(); } else { strings = Collections.emptyListIterator(); } //... }
Example 3
Source Project: systemds File: MatrixBlock.java License: Apache License 2.0 | 5 votes |
public Iterator<IJV> getSparseBlockIterator(int rl, int ru) { //check for valid format, should have been checked from outside if( !sparse ) throw new RuntimeException("getSparseBlockInterator should not be called for dense format"); //check for existing sparse block: return empty list if( sparseBlock==null ) return Collections.emptyListIterator(); //get iterator over sparse block return sparseBlock.getIterator(rl, ru); }
Example 4
Source Project: storm_spring_boot_demo File: KafkaSpout.java License: MIT License | 5 votes |
@Override public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) { initialized = false; this.context = context; // Spout internals this.collector = collector; numUncommittedOffsets = 0; // Offset management firstPollOffsetStrategy = kafkaSpoutConfig.getFirstPollOffsetStrategy(); // with AutoCommitMode, offset will be periodically committed in the background by Kafka consumer // consumerAutoCommitMode = kafkaSpoutConfig.isConsumerAutoCommitMode(); //永远设置为false consumerAutoCommitMode = false; // Retries management retryService = kafkaSpoutConfig.getRetryService(); if (!consumerAutoCommitMode) { // If it is auto commit, no need to commit offsets manually commitTimer = new Timer(TIMER_DELAY_MS, kafkaSpoutConfig.getOffsetsCommitPeriodMs(), TimeUnit.MILLISECONDS); } refreshSubscriptionTimer = new Timer(TIMER_DELAY_MS, kafkaSpoutConfig.getPartitionRefreshPeriodMs(), TimeUnit.MILLISECONDS); acked = new HashMap<>(); emitted = new HashSet<>(); waitingToEmit = Collections.emptyListIterator(); LOG.info("Kafka Spout opened with the following configuration: {}", kafkaSpoutConfig); }
Example 5
Source Project: systemds File: MatrixBlock.java License: Apache License 2.0 | 5 votes |
public Iterator<IJV> getSparseBlockIterator(int rl, int ru) { //check for valid format, should have been checked from outside if( !sparse ) throw new RuntimeException("getSparseBlockInterator should not be called for dense format"); //check for existing sparse block: return empty list if( sparseBlock==null ) return Collections.emptyListIterator(); //get iterator over sparse block return sparseBlock.getIterator(rl, ru); }
Example 6
Source Project: wildfly-core File: DefaultOperationRequestAddress.java License: GNU Lesser General Public License v2.1 | 5 votes |
@Override public Iterator<Node> iterator() { if(nodes.isEmpty()) { return Collections.emptyListIterator(); } final Node[] array = nodes.toArray(new Node[nodes.size()]); return new Iterator<Node>() { int i = 0; @Override public boolean hasNext() { return i < array.length; } @Override public Node next() { return array[i++]; } @Override public void remove() { throw new UnsupportedOperationException(); } }; }
Example 7
Source Project: phoenix File: IndexMaintainer.java License: Apache License 2.0 | 5 votes |
public static void serializeServerMaintainedIndexes(PTable dataTable, ImmutableBytesWritable ptr, List<PTable> indexes, PhoenixConnection connection) { Iterator<PTable> indexesItr = Collections.emptyListIterator(); boolean onlyLocalIndexes = dataTable.isImmutableRows() || dataTable.isTransactional(); if (onlyLocalIndexes) { if (!dataTable.isTransactional() || !dataTable.getTransactionProvider().getTransactionProvider().isUnsupported(Feature.MAINTAIN_LOCAL_INDEX_ON_SERVER)) { indexesItr = maintainedLocalIndexes(indexes.iterator()); } } else { indexesItr = maintainedIndexes(indexes.iterator()); } serialize(dataTable, ptr, Lists.newArrayList(indexesItr), connection); }
Example 8
Source Project: levelup-java-examples File: ReturnEmptyListIterator.java License: Apache License 2.0 | 3 votes |
@Test public void return_empty_list_iterator_java () { ListIterator<String> strings = Collections.emptyListIterator(); assertFalse(strings.hasNext()); }