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:Main.java

/**
 * Extracts child elements from node whith type <code>ELEMENT_NODE</code>.
 *
 * @param node root node of XML document for search.
 * @return iterator with proper node childs.
 *///from   ww  w  .  j  av  a 2s. c  om
public static Iterator<Element> getChildElements(final Node node) {
    //        node.normalize();
    return new Iterator<Element>() {
        private final NodeList nodes = node.getChildNodes();
        private int nextPos = 0;
        private Element nextElement = seekNext();

        public boolean hasNext() {
            return nextElement != null;
        }

        public Element next() {
            if (nextElement == null)
                throw new NoSuchElementException();
            final Element result = nextElement;
            nextElement = seekNext();
            return result;
        }

        public void remove() {
            throw new UnsupportedOperationException("operation not supported");
        }

        private Element seekNext() {
            for (int i = nextPos, len = nodes.getLength(); i < len; i++) {
                final Node childNode = nodes.item(i);
                if (childNode.getNodeType() == Node.ELEMENT_NODE) {
                    nextPos = i + 1;
                    return (Element) childNode;
                }
            }
            return null;
        }
    };
}

From source file:Main.java

public static <E extends Comparable<E>> E getSmallestNotNull(final Collection<? extends E> c) {
    if ((c instanceof List) && (c instanceof RandomAccess)) {
        return getSmallestNotNull((List<? extends E>) c);
    }/*from   w w  w  . j  a v  a  2 s .c om*/

    final Iterator<? extends E> iterator = c.iterator();
    E result = iterator.next();
    E element;

    while (iterator.hasNext()) {
        element = iterator.next();
        if (element == null) {
            continue;
        }
        if ((result == null) || (element.compareTo(result) < 0)) {
            result = element;
        }
    }

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

    return result;
}

From source file:Main.java

public static <E extends Comparable<E>> E getGreatestNotNull(final Collection<? extends E> c) {
    if ((c instanceof List) && (c instanceof RandomAccess)) {
        return getGreatestNotNull((List<? extends E>) c);
    }//from  w ww  .j  a v a  2  s.c  o m

    final Iterator<? extends E> iterator = c.iterator();
    E result = iterator.next();
    E element;

    while (iterator.hasNext()) {
        element = iterator.next();
        if (element == null) {
            continue;
        }
        if ((result == null) || (element.compareTo(result) > 0)) {
            result = element;
        }
    }

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

    return result;
}

From source file:Main.java

/**
 * INTERNAL: Gets the first object in the collection. If the
 * collection does not contain any elements NoSuchElementException
 * is thrown.<p>/*w  w w.  j av a  2 s  .  c om*/
 *
 * @since 1.3.4
 */
public static <T> T getFirstElement(Collection<T> coll) {
    if ((coll == null) || coll.isEmpty())
        throw new NoSuchElementException();
    return coll.iterator().next();
}

From source file:Main.java

@SuppressWarnings("unchecked")
public static <T> Iterable<T> concat(final Iterable<T>... collections) {
    return new Iterable<T>() {
        @Override//from w ww .j a v a2 s  .  c o  m
        public Iterator<T> iterator() {
            return new Iterator<T>() {
                final Iterable<T>[] iterables = collections;
                int iteratorIdx = 0;
                Iterator<T> it = collections[0].iterator();

                private synchronized void advanceCursor() {
                    while (!it.hasNext() && iteratorIdx < iterables.length) {
                        iteratorIdx += 1;
                        if (iteratorIdx == iterables.length) {
                            it = new Iterator<T>() {
                                @Override
                                public boolean hasNext() {
                                    return false;
                                }

                                @Override
                                public T next() {
                                    throw new NoSuchElementException();
                                }

                                @Override
                                public void remove() {
                                    throw new RuntimeException();
                                }
                            };
                        } else {
                            it = iterables[iteratorIdx].iterator();
                        }
                    }
                }

                @Override
                public synchronized boolean hasNext() {
                    advanceCursor();
                    return iteratorIdx != iterables.length && it.hasNext();
                }

                @Override
                public synchronized T next() {
                    advanceCursor();
                    if (iteratorIdx == iterables.length)
                        throw new NoSuchElementException();
                    return it.next();
                }

                @Override
                public void remove() {
                    throw new UnsupportedOperationException();
                }
            };
        }
    };
}

From source file:Main.java

public static <T> Iterator<T> singletonIterator(final T item) {
    return new Iterator<T>() {
        private boolean gotItem = false;

        public boolean hasNext() {
            return !this.gotItem;
        }/* ww  w .j  ava2  s  .  c o m*/

        public T next() {
            if (this.gotItem) {
                throw new NoSuchElementException();
            }
            this.gotItem = true;
            return item;
        }

        public void remove() {
            if (!this.gotItem) {
                this.gotItem = true;
            } else {
                throw new NoSuchElementException();
            }
        }
    };
}

From source file:EmptyIterator.java

/**
 * @return null
 */
public Object next() {
    throw new NoSuchElementException();
}

From source file:IterableString.java

public Character next() {
    if (count == str.length())
        throw new NoSuchElementException();

    count++;//from  w ww .j  av  a 2 s .  c o  m
    return str.charAt(count - 1);
}

From source file:Main.java

public static <E> E getSmallest(final Comparator<? super E> comparator, final Collection<? extends E> c) {
    if (c.isEmpty()) {
        throw new NoSuchElementException();
    }/* w w  w .  jav  a2s  . c  o m*/

    if ((c instanceof List) && (c instanceof RandomAccess)) {
        return getSmallest(comparator, (List<? extends E>) c);
    }

    final Iterator<? extends E> iterator = c.iterator();
    E result = iterator.next();
    E element;

    while (iterator.hasNext()) {
        element = iterator.next();
        if (comparator.compare(element, result) < 0) {
            result = element;
        }
    }

    return result;
}

From source file:Main.java

public static <E> E getGreatest(final Comparator<? super E> comparator, final Collection<? extends E> c) {
    if (c.isEmpty()) {
        throw new NoSuchElementException();
    }/*from  ww w  . j a v a2 s .com*/

    if ((c instanceof List) && (c instanceof RandomAccess)) {
        return getGreatest(comparator, (List<? extends E>) c);
    }

    final Iterator<? extends E> iterator = c.iterator();
    E result = iterator.next();
    E element;

    while (iterator.hasNext()) {
        element = iterator.next();
        if (comparator.compare(element, result) > 0) {
            result = element;
        }
    }

    return result;
}