List of usage examples for java.util Collection size
int size();
From source file:com.micmiu.modules.utils.Collections3.java
/** * ????(Getter), ??List.//from w w w. ja v a2s . com * * @param collection ???. * @param propertyName ??????. */ public static List extractToList(final Collection collection, final String propertyName) { List list = new ArrayList(collection.size()); try { for (Object obj : collection) { list.add(PropertyUtils.getProperty(obj, propertyName)); } } catch (Exception e) { throw Reflections.convertReflectionExceptionToUnchecked(e); } return list; }
From source file:com.enonic.cms.core.content.ContentKey.java
public static List<ContentKey> convertToList(Collection<Integer> collection) { if (collection == null || collection.size() == 0) { return null; }/*from www .j a v a2 s . c om*/ List<ContentKey> list = new ArrayList<ContentKey>(collection.size()); for (int value : collection) { list.add(new ContentKey(value)); } return list; }
From source file:Main.java
/** * A version of {@link #zipMap(Object[], Object[])} that works with * {@link Collection}s.//from w ww.j av a2 s. c o m * * @param keys Items that will be the keys in the resulting {@code Map}. * @param values Items that will be the values in the result {@code Map}. * * @return A {@code Map} whose entries are of the form * {@code keys[N], values[N]}. * * @see #zipMap(Object[], Object[]) */ public static <K, V> Map<K, V> zipMap(Collection<? extends K> keys, Collection<? extends V> values) { Map<K, V> zipped = new LinkedHashMap<>(keys.size()); Iterator<? extends K> keyIterator = keys.iterator(); Iterator<? extends V> valueIterator = values.iterator(); while (keyIterator.hasNext() && valueIterator.hasNext()) { zipped.put(keyIterator.next(), valueIterator.next()); } return zipped; }
From source file:legendarena.api.fanciful.ArrayWrapper.java
/** * Converts an iterable element collection to an array of elements. * The iteration order of the specified object will be used as the array element order. * @param list The iterable of objects which will be converted to an array. * @param c The type of the elements of the array. * @return An array of elements in the specified iterable. *//*from ww w. j a v a 2 s . c om*/ @SuppressWarnings("unchecked") public static <T> T[] toArray(Iterable<? extends T> list, Class<T> c) { int size = -1; if (list instanceof Collection<?>) { @SuppressWarnings("rawtypes") Collection coll = (Collection) list; size = coll.size(); } if (size < 0) { size = 0; //Ugly hack: Count it ourselves for (@SuppressWarnings("unused") T element : list) size++; } T[] result = (T[]) Array.newInstance(c, size); int i = 0; for (T element : list) // Assumes iteration order is consistent result[i++] = element; // Assign array element at index THEN increment counter return result; }
From source file:Main.java
/** * Returns <code>true</code> iff at least one element is in both collections15. * <p/>/*from w w w. j av a2 s .c om*/ * In other words, this method returns <code>true</code> iff the * {@link #intersection} of <i>coll1</i> and <i>coll2</i> is not empty. * * @param coll1 the first collection, must not be null * @param coll2 the first collection, must not be null * @return <code>true</code> iff the intersection of the collections15 is non-empty * @see #intersection * @since 2.1 */ public static <E> boolean containsAny(final Collection<? extends E> coll1, final Collection<? extends E> coll2) { if (coll1.size() < coll2.size()) { for (Iterator it = coll1.iterator(); it.hasNext();) { if (coll2.contains(it.next())) { return true; } } } else { for (Iterator it = coll2.iterator(); it.hasNext();) { if (coll1.contains(it.next())) { return true; } } } return false; }
From source file:Main.java
public static List<String> getSortedStringList(Collection<String> toSort) { List<String> sorted = new LinkedList<String>(); final PriorityQueue<String> ordered = new PriorityQueue<String>( toSort.size() + 1/*In case the toSort is empty*/, new Comparator<String>() { @Override//from w w w .ja va 2 s.c o m public int compare(String lhs, String rhs) { lhs = lhs.replaceAll("[^a-zA-Z0-9]", ""); rhs = rhs.replaceAll("[^a-zA-Z0-9]", ""); int result = rhs.compareTo(lhs); return result; } }); ordered.addAll(toSort); int originalSize = ordered.size(); for (int i = 0; i < originalSize; i++) { sorted.add(ordered.poll()); } return sorted; }
From source file:Main.java
@SuppressWarnings({ "rawtypes" })
private static Object toIntegerArray(Collection collection) {
int[] ia = new int[collection.size()];
int i = 0;//w w w . j ava 2 s . com
for (Object o : collection) {
int j = ((Integer) o).intValue();
ia[i++] = j;
}
return ia;
}
From source file:Main.java
public static File[] listFiles(File directory, boolean recurse, FileFilter filter) { if (!recurse) { return directory.listFiles(filter); } else {//from w ww .j ava2 s .c om Collection<File> mFiles = new java.util.LinkedList<File>(); innerListFiles(mFiles, directory, filter); return (File[]) mFiles.toArray(new File[mFiles.size()]); } }
From source file:Main.java
public static <T> List<T> conjunction(Collection<T> c1, Collection<T> c2) { if (c1 == null || c2 == null) { return null; } else {/* www . ja va 2 s . c o m*/ List<T> result = new ArrayList<T>(c1.size()); for (T o : c1) { if (c2.contains(o)) { result.add(o); } } return result; } }
From source file:org.ssoup.backend.web.RdfModelConverter.java
private static MediaType[] buildMediaTypeArray() { // now register the media types this converter can handle Collection<Lang> languages = RDFLanguages.getRegisteredLanguages(); MediaType[] mediatypes = new MediaType[languages.size()]; int i = 0;/*from www .j a v a2 s . c o m*/ for (Lang lang : languages) { ContentType ct = lang.getContentType(); logger.debug("registering converter for rdf content type {}", lang.getContentType()); MediaType mt = new MediaType(ct.getType(), ct.getSubType()); mediatypes[i++] = mt; } return mediatypes; }