Example usage for java.util NoSuchElementException NoSuchElementException

Introduction

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

Prototype

public NoSuchElementException()

Source Link

Document

Constructs a NoSuchElementException with null as its error message string.

Usage

From source file:ConcurrentDoublyLinkedList.java

/**
 * Returns element unless it is null, in which case throws
 * NoSuchElementException./*from  ww w .j  a  v a 2s  .  com*/
 * 
 * @param v
 *            the element
 * @return the element
 */
private E screenNullResult(E v) {
    if (v == null)
        throw new NoSuchElementException();
    return v;
}

From source file:net.javacoding.queue.DiskQueue.java

/**
 * @see org.archive.queue.Queue#peek()/* w  ww.  ja  va2s. co m*/
 */
public Object peek() {
    if (isEmpty()) {
        throw new NoSuchElementException();
    }
    if (headObject == null) {
        loadHead();
    }
    return headObject;
}

From source file:ShortPriorityQueue.java

/**
 * Returns the smallest element in the queue.  Unlike {@link
 * #peekLast()}, this method throws an exception if the queue is
 * empty.//from w w  w  .  ja  v  a2 s  .co  m
 *
 * @return The smallest element in the queue.
 * @throws IllegalArgumentException If the queue is empty.
 */
public E last() {
    if (isEmpty())
        throw new NoSuchElementException();
    return mElts[mSize - 1];
}

From source file:edu.berkeley.compbio.sequtils.sequencefragmentiterator.SequentialMatePairSFI.java

public SequenceFragment next() {
    // return theSectionList.hasNext(); // doesn't guarantee that the next NucleotideKcount is not null

    // we don't use a SectionSequenceFragmentIterator here, because that way we'd unnecessarily count
    // every section whether or not it ends up in a mate pair

    try {/*from   ww  w . j  a  v  a  2  s.c o m*/

        SequenceFragmentMetadata s1;
        SequenceFragmentMetadata s2 = sectionList.next();
        SequenceFragment result = null;
        while (true) //(s2 != null)
        {
            s1 = s2;
            s2 = sectionList.next();
            if (isMatePair(s1, s2)) {
                sectionList.seek(s1);
                SequenceFragment k1 = new SequenceFragment(s1.getParentMetadata(), s1.getSequenceName(),
                        s1.getStartPosition(), sectionList, SequenceFragment.UNKNOWN_LENGTH, spectrumScanner);
                k1.checkAvailable();
                //Kcount k1 = scanner.scanSequence(theSectionList, Integer.MAX_VALUE);

                sectionList.seek(s2);
                //Kcount k2 = scanner.scanSequence(theSectionList, Integer.MAX_VALUE);
                SequenceFragment k2 = new SequenceFragment(s1.getParentMetadata(), s1.getSequenceName(),
                        s1.getStartPosition(), sectionList, SequenceFragment.UNKNOWN_LENGTH, spectrumScanner);
                k2.checkAvailable();
                result = joinMatePair(k1, k2);
                break;
            }
            //theNextKcount = joinPotentialMatePair(s1, s2);
        }
        charactersRead += result.getLength();
        return result;
    } catch (IOException e) {
        logger.error("Error", e);
        throw new NoSuchElementException();
    } catch (NotEnoughSequenceException e) {
        // no problem, end of sequence
        throw new NoSuchElementException();
    }
}

From source file:edu.cornell.med.icb.goby.readers.FastXReader.java

/**
 * Return the next FASTA entries. This returns next FastaEntry that is
 * re-used for every next! Do not directly store this value as it is reused.
 * @return the next FastaEntry entry//from w w  w.j  a v a  2  s . com
 */
public FastXEntry next() {
    if (nextEntry == null) {
        try {
            readNextEntry();
            if (nextEntry == null) {
                throw new NoSuchElementException();
            }
        } catch (IOException e) {
            throw new GobyRuntimeException(e);
        }
    }
    final FastXEntry toReturn = nextEntry;
    nextEntry = null;
    return toReturn;
}

From source file:org.dataconservancy.access.connector.HttpDcsSearchIterator.java

@Override
public DcsEntity next() {
    try {//  w w  w . j a v  a  2s . c o m
        refreshCurrentIterator();
    } catch (IOException e) {
        log.error(e.getMessage(), e);
        reset();
    } catch (InvalidXmlException e) {
        log.error(e.getMessage(), e);
        reset();
    }

    if (currentItr != null) {
        currentIterPosition++;
        return currentItr.next();
    }

    throw new NoSuchElementException();
}

From source file:com.phoenixst.plexus.traversals.BreadthFirstTraverser.java

public Object next() {
    LOGGER.debug("next():");
    if (current != null && current.hasNext()) {
        LOGGER.debug("  Adding last created Traverser to end of queue.");
        traverserQueue.addLast(current);
    }//from w w w.j  a v  a 2 s .  co  m
    current = null;

    while (!traverserQueue.isEmpty()) {
        Traverser t = (Traverser) traverserQueue.getFirst();
        LOGGER.debug("  Calling hasNext() on first Traverser in queue.");
        if (t.hasNext()) {
            Object node = t.next();
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("  Creating new Traverser for " + node + ".");
            }
            current = (Traverser) traverserFactory.transform(node);
            return node;
        }
        LOGGER.debug("  Removing first Traverser in queue.");
        traverserQueue.removeFirst();
    }

    throw new NoSuchElementException();
}

From source file:com.martinkampjensen.thesis.util.gromacs.EnergyExtractor.java

/**
 * Reads and returns the next energy value.
 * //from   w  ww .  java 2  s.  c o m
 * @return the energy value.
 * @throws IllegalStateException if {@link #close()} has been called.
 * @throws NoSuchElementException if there are no more energy values. This
 *         means that {@link #hasNext()} would have returned
 *         <code>false</code> immediately before this method was called or
 *         that an {@link IOException} occurred.
 */
@Override
public double next() {
    checkState();

    if (!_hasNext) {
        throw new NoSuchElementException();
    }

    _nValues++;
    final double toReturn = _next;

    try {
        _next = readReal(_input, _useDoublePrecision);
        skipBytes(_input, _bytesBetweenValues);
    } catch (EOFException e) {
        _hasNext = false;
    } catch (IOException e) {
        final NoSuchElementException nsee = new NoSuchElementException();
        nsee.initCause(e);

        try {
            _input.close();
        } catch (IOException e2) {
            // Ignore second IOException.
        }

        throw nsee;
    }

    return toReturn;
}

From source file:MiniMap.java

/**
 * @see java.util.Map#keySet()//from w ww.ja  v a  2s.  c om
 */
public Set<K> keySet() {
    return new AbstractSet<K>() {
        @Override
        public Iterator<K> iterator() {
            return new Iterator<K>() {
                public boolean hasNext() {
                    return i < size - 1;
                }

                public K next() {
                    // Just in case... (WICKET-428)
                    if (!hasNext()) {
                        throw new NoSuchElementException();
                    }

                    // Find next key
                    i = nextKey(nextIndex(i));

                    // Get key
                    return keys[i];
                }

                public void remove() {
                    keys[i] = null;
                    values[i] = null;
                    size--;
                }

                int i = -1;
            };
        }

        @Override
        public int size() {
            return size;
        }
    };
}

From source file:com.metamx.druid.indexing.common.index.StaticS3FirehoseFactory.java

@Override
public Firehose connect() throws IOException {
    Preconditions.checkNotNull(s3Client, "null s3Client");

    return new Firehose() {
        LineIterator lineIterator = null;
        final Queue<URI> objectQueue = Lists.newLinkedList(uris);

        // Rolls over our streams and iterators to the next file, if appropriate
        private void maybeNextFile() throws Exception {

            if (lineIterator == null || !lineIterator.hasNext()) {

                // Close old streams, maybe.
                if (lineIterator != null) {
                    lineIterator.close();
                }/*from   w w w  .j  a v a 2s .  c om*/

                // Open new streams, maybe.
                final URI nextURI = objectQueue.poll();
                if (nextURI != null) {

                    final String s3Bucket = nextURI.getAuthority();
                    final S3Object s3Object = new S3Object(
                            nextURI.getPath().startsWith("/") ? nextURI.getPath().substring(1)
                                    : nextURI.getPath());

                    log.info("Reading from bucket[%s] object[%s] (%s)", s3Bucket, s3Object.getKey(), nextURI);

                    int ntry = 0;
                    try {
                        final InputStream innerInputStream = s3Client.getObject(s3Bucket, s3Object.getKey())
                                .getDataInputStream();

                        final InputStream outerInputStream = s3Object.getKey().endsWith(".gz")
                                ? new GZIPInputStream(innerInputStream)
                                : innerInputStream;

                        lineIterator = IOUtils.lineIterator(
                                new BufferedReader(new InputStreamReader(outerInputStream, Charsets.UTF_8)));
                    } catch (IOException e) {
                        log.error(e,
                                "Exception reading from bucket[%s] object[%s] (try %d) (sleeping %d millis)",
                                s3Bucket, s3Object.getKey(), ntry, retryMillis);

                        ntry++;
                        if (ntry <= retryCount) {
                            Thread.sleep(retryMillis);
                        }
                    }

                }
            }

        }

        @Override
        public boolean hasMore() {
            try {
                maybeNextFile();
            } catch (Exception e) {
                throw Throwables.propagate(e);
            }

            return lineIterator != null && lineIterator.hasNext();
        }

        @Override
        public InputRow nextRow() {
            try {
                maybeNextFile();
            } catch (Exception e) {
                throw Throwables.propagate(e);
            }

            if (lineIterator == null) {
                throw new NoSuchElementException();
            }

            return parser.parse(lineIterator.next());
        }

        @Override
        public Runnable commit() {
            // Do nothing.
            return new Runnable() {
                public void run() {
                }
            };
        }

        @Override
        public void close() throws IOException {
            objectQueue.clear();
            if (lineIterator != null) {
                lineIterator.close();
            }
        }
    };
}