Example usage for org.apache.commons.collections15.iterators EmptyIterator INSTANCE

Introduction

In this page you can find the example usage for org.apache.commons.collections15.iterators EmptyIterator INSTANCE.

Prototype

Iterator INSTANCE

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Document

Singleton instance of the iterator.

Usage

From source file:org.openanzo.rdf.utils.MultiTreeMap.java

/**
 * Gets an iterator for the collection mapped to the specified key.
 * /*from   w w  w. ja  v a2 s  . com*/
 * @param key
 *            the key to get an iterator for
 * @return the iterator of the collection at the key, empty iterator if key not in map
 * @since Commons Collections 3.1
 */
@SuppressWarnings("unchecked")
public Iterator<V> iterator(Object key) {
    Collection<V> coll = getCollection(key);
    if (coll == null) {
        return EmptyIterator.INSTANCE;
    }
    return coll.iterator();
}

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