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(String s)

Source Link

Document

Constructs a NoSuchElementException , saving a reference to the error message string s for later retrieval by the getMessage method.

Usage

From source file:Main.java

public static <T> T third(List<T> list) {
    if (list.size() < 3) {
        throw new NoSuchElementException("Collection does not have a enough elements");
    }//w ww  . j  ava2 s  .  c  om
    return list.get(2);
}

From source file:Main.java

public static <T> T fifth(List<T> list) {
    if (list.size() < 5) {
        throw new NoSuchElementException("Collection does not have a enough elements");
    }// w  ww . j  a  va 2  s  . co m
    return list.get(4);
}

From source file:Main.java

public static <T> T fourth(List<T> list) {
    if (list.size() < 4) {
        throw new NoSuchElementException("Collection does not have a enough elements");
    }//from w ww .  j a v a2 s .  c om
    return list.get(3);
}

From source file:Main.java

public static <T> T only(Collection<T> coll) {
    if (coll.size() != 1) {
        throw new NoSuchElementException("Collection has none or more than one elements");
    }/*from w ww  .  j  a v a  2s  . c  o m*/
    return coll.iterator().next();
}

From source file:Main.java

/**
 * Returns the single element contained in a collection or a null
 * if the collection is null or empty./*w  w  w  . j a  v a  2  s .  c  o  m*/
 * 
 * @param c the collection containing a single element
 * @return Object the single element contained in the collection
 * @throws NoSuchElementException If the collection contains more than one element.
 */
public static Object getUniqueElement(Collection c) throws NoSuchElementException {
    // Return null if list is null or empty
    if (c == null || c.isEmpty())
        return null;

    // Throw an exception if collection has more than one element
    if (c.size() > 1) {
        NoSuchElementException exc = new NoSuchElementException(
                "CollectionHelper.getUniqueElement() called with a collection containing "
                        + "more than one element.");
        throw exc;
    }

    return c.iterator().next();
}

From source file:Main.java

public static Element firstChildElement(Element element, String childNameSpace, String childName)
        throws NoSuchElementException {
    NodeList childCandidateList;//w  w w  .j a va 2 s .  c o  m
    if (childNameSpace == null || childNameSpace.isEmpty()) {
        childCandidateList = element.getElementsByTagName(childName);
    } else {
        /*childCandidateList = element.getElementsByTagNameNS(childNameSpace,
          childName);*/
        childCandidateList = element.getElementsByTagNameNS(childNameSpace, childName);
    }
    if (childCandidateList.getLength() > 0) {
        Element firstChild = (Element) childCandidateList.item(0);
        return firstChild;
    } else {
        throw new NoSuchElementException("No child candidate found in this element");
    }
}

From source file:Main.java

public static int indexOf(Object[] array, Object obj) {
    for (int i = 0; i < array.length; ++i) {
        if (obj == array[i]) {
            return i;
        }//w ww. ja  v  a2 s .  co  m
    }
    throw new NoSuchElementException("" + obj);
}

From source file:Main.java

public static String getAttribute(Element element, String name) {
    String value = element.getAttribute(name);
    if (value != null && !value.isEmpty()) {
        return value;
    }//w  w  w .j  a va2 s .com
    throw new NoSuchElementException(String.format("Element <%s> has no \"%s\" attribute", element, name));
}

From source file:Main.java

public static <T> Enumeration<T> getEmptyEnumeration() {
    return new Enumeration<T>() {
        public boolean hasMoreElements() {
            return false;
        }/*w w w  .j a  v a2 s . c o  m*/

        public T nextElement() {
            throw new NoSuchElementException("Trying to get element of an empty enumeration");
        }
    };
}

From source file:Main.java

/**
 * The function getFirstChildWithTagName() returns the first child node from
 * a node, identified by its node name./*from   ww w  .j ava 2s.c o m*/
 *
 * @param data
 *            Document or Element whose children shall be examined
 * @param tagName
 *            name of the node to find
 * @return first child node with that node name
 * @throws NoSuchElementException
 *             if no child node with that name can be found
 */
public static Element getFirstChildWithTagName(Node data, String tagName) {
    for (Node element = data.getFirstChild(); element != null; element = element.getNextSibling()) {
        if (!(element instanceof Element)) {
            continue;
        }
        if (element.getNodeName().equals(tagName)) {
            return (Element) element;
        }
    }
    throw new NoSuchElementException(tagName);
}