How to use

iterator

method

in

java.util.ArrayList

@Override
public boolean hasNext() {
  while ((delegate == null || !delegate.hasNext()) && (providers.hasNext())) {
    final QueueItemAuthenticatorProvider provider = providers.next();
    if (provider == null) {
      continue;
    }
    delegate = new ArrayList<QueueItemAuthenticator>(provider.getAuthenticators()).iterator();
  }
  return delegate != null && delegate.hasNext();
}

private Iterator<Long> getIds() {
  try {
    partitionIdsLock.lock();
    LOG.debug("Iterator partitionIds: {}", partitionIds);
    return new ArrayList<>(partitionIds).iterator();
  } finally {
    partitionIdsLock.unlock();
  }
}

@Override
public TaskMessage next() {
  TaskMessage msg;
  if (iter.hasNext()) {
    msg = iter.next();
  } else {
    bundleOffset++;
    iter = bundle.get(bundleOffset).iterator();
    msg = iter.next();
  }
  if (null != msg) {
    offset++;
  }
  return msg;
}

protected Iterator<String> listKeys(Path path) throws IOException {
  ArrayList<String> ret = new ArrayList<String>();
  FileStatus[] files = _fs.listStatus(new Path[]{path});
  if (files != null) {
    for (FileStatus sub : files) {
      try {
        ret.add(sub.getPath().getName().toString());
      } catch (IllegalArgumentException e) {
        //Ignored the file did not match
        LOG.debug("Found an unexpected file in {} {}", path, sub.getPath().getName());
      }
    }
  }
  return ret.iterator();
}

@Test
public void testUnsecure() throws ZooKeeperConnectionException, IOException {
 Configuration conf = HBaseConfiguration.create();
 conf.set(Superusers.SUPERUSER_CONF_KEY, "user1");
 String node = "/hbase/testUnsecure";
 ZKWatcher watcher = new ZKWatcher(conf, node, null, false);
 List<ACL> aclList = ZKUtil.createACL(watcher, node, false);
 assertEquals(1, aclList.size());
 assertTrue(aclList.contains(Ids.OPEN_ACL_UNSAFE.iterator().next()));
}

public void testIndexOf_consumedDataNoMatch() {
 Iterator<String> iterator = Lists.newArrayList("manny", "mo", "mo", "jack").iterator();
 assertEquals(-1, Iterators.indexOf(iterator, Predicates.equalTo("bob")));
 assertFalse(iterator.hasNext());
}

public MessageAck[] getAcks() {
  ArrayList<Object> list = new ArrayList<Object>();
  for (Iterator<TxOperation> iter = operations.iterator(); iter.hasNext();) {
    TxOperation op = iter.next();
    if (op.operationType == TxOperation.REMOVE_OPERATION_TYPE) {
      list.add(op.data);
    }
  }
  MessageAck rc[] = new MessageAck[list.size()];
  list.toArray(rc);
  return rc;
}

protected Iterator<LocalFsBlobStoreFile> listBlobStoreFiles(File path) throws IOException {
  ArrayList<LocalFsBlobStoreFile> ret = new ArrayList<LocalFsBlobStoreFile>();
  File[] files = path.listFiles();
  if (files != null) {
    for (File sub : files) {
      try {
        ret.add(new LocalFsBlobStoreFile(sub.getParentFile(), sub.getName()));
      } catch (IllegalArgumentException e) {
        //Ignored the file did not match
        LOG.warn("Found an unexpected file in {} {}", path, sub.getName());
      }
    }
  }
  return ret.iterator();
}

private ArrayList<JniSection> getNativeCodeBodies (String classFile) {
  ArrayList<JniSection> sections = getComments(classFile);
  Iterator<JniSection> iter = sections.iterator();
  while (iter.hasNext()) {
    JniSection section = iter.next();
    if (section.getNativeCode().startsWith("JNI")) iter.remove();
    if (section.getNativeCode().startsWith("-{")) iter.remove();
    if (!CustomIgnoreTag.isEmpty() && section.getNativeCode().startsWith(CustomIgnoreTag)) iter.remove();
  }
  return sections;
}

@NotNull
@Override
public Iterator<List<KeyStroke>> iterator() {
 return new ArrayList<List<KeyStroke>>(myKeys.keySet()).iterator();
}

@Test
public void testSecuritySingleSuperuser() throws ZooKeeperConnectionException, IOException {
 Configuration conf = HBaseConfiguration.create();
 conf.set(Superusers.SUPERUSER_CONF_KEY, "user1");
 String node = "/hbase/testSecuritySingleSuperuser";
 ZKWatcher watcher = new ZKWatcher(conf, node, null, false);
 List<ACL> aclList = ZKUtil.createACL(watcher, node, true);
 assertEquals(2, aclList.size()); // 1+1, since ACL will be set for the creator by default
 assertTrue(aclList.contains(new ACL(Perms.ALL, new Id("sasl", "user1"))));
 assertTrue(aclList.contains(Ids.CREATOR_ALL_ACL.iterator().next()));
}

public Message[] getMessages() {
  ArrayList<Object> list = new ArrayList<Object>();
  for (Iterator<TxOperation> iter = operations.iterator(); iter.hasNext();) {
    TxOperation op = iter.next();
    if (op.operationType == TxOperation.ADD_OPERATION_TYPE) {
      list.add(op.data);
    }
  }
  Message rc[] = new Message[list.size()];
  list.toArray(rc);
  return rc;
}

protected Iterator<BlobStoreFile> listBlobStoreFiles(Path path) throws IOException {
  ArrayList<BlobStoreFile> ret = new ArrayList<BlobStoreFile>();
  FileStatus[] files = _fs.listStatus(new Path[]{path});
  if (files != null) {
    for (FileStatus sub : files) {
      try {
        ret.add(new HdfsBlobStoreFile(sub.getPath().getParent(), sub.getPath().getName(),
            _hadoopConf));
      } catch (IllegalArgumentException e) {
        //Ignored the file did not match
        LOG.warn("Found an unexpected file in {} {}", path, sub.getPath().getName());
      }
    }
  }
  return ret.iterator();
}

private ArrayList<JniSection> getNativeCodeBodies (String classFile) {
  ArrayList<JniSection> sections = getComments(classFile);
  Iterator<JniSection> iter = sections.iterator();
  while (iter.hasNext()) {
    JniSection section = iter.next();
    if (section.getNativeCode().startsWith("JNI")) iter.remove();
    if (section.getNativeCode().startsWith("-{")) iter.remove();
    if (!CustomIgnoreTag.isEmpty() && section.getNativeCode().startsWith(CustomIgnoreTag)) iter.remove();
  }
  return sections;
}

public Iterator makeEmptyIterator() {
  ArrayList list = new ArrayList();
  return new IteratorChain(list.iterator());
}

private synchronized void refreshMeasurements() {
  ArrayList<Measurement> newMeasurements = new ArrayList<Measurement>();
  Iterator<Measurement> iterator = mMeasurements.iterator();
  while (iterator.hasNext()) {
    Measurement measurement = iterator.next();
    if (SystemClock.elapsedRealtime() - measurement.timestamp < sampleExpirationMilliseconds ) {
      newMeasurements.add(measurement);
    }
  }
  mMeasurements = newMeasurements;
  Collections.sort(mMeasurements);
}

protected Iterator<LocalFsBlobStoreFile> listBlobStoreFiles(File path) throws IOException {
  ArrayList<LocalFsBlobStoreFile> ret = new ArrayList<LocalFsBlobStoreFile>();
  File[] files = path.listFiles();
  if (files != null) {
    for (File sub: files) {
      try {
        ret.add(new LocalFsBlobStoreFile(sub.getParentFile(), sub.getName()));
      } catch (IllegalArgumentException e) {
        //Ignored the file did not match
        LOG.warn("Found an unexpected file in {} {}",path, sub.getName());
      }
    }
  }
  return ret.iterator();
}

protected String getExpressionSetSummary(java.util.ArrayList<Integer> list) {
  if (list.contains(NO_SPEC)) {
    return "?";
  }
  if (list.contains(ALL_SPEC)) {
    return "*";
  }
  StringBuilder buf = new StringBuilder();
  Iterator<Integer> itr = list.iterator();
  boolean first = true;
  while (itr.hasNext()) {
    Integer iVal = itr.next();
    String val = iVal.toString();
    if (!first) {
      buf.append(",");
    }
    buf.append(val);
    first = false;
  }
  return buf.toString();
}

public Iterator makeEmptyIterator() {
  ArrayList list = new ArrayList();
  return new ObjectGraphIterator(list.iterator(), null);
}

public void addMetric(MetricData data) {
 Iterator<MetricData> it = metricData.iterator();
 while (it.hasNext()) {
  MetricData temp = it.next();
  if (temp.metricName.equals(data.metricName)) {
   // System.out.println("Not adding same metric again......"+temp.metricName);
   return;
  }
 }
 metricData.add(data);
}