public abstract class CollectionFactory extends Object
The goal of this class is to avoid runtime dependencies on a specific Java version, while nevertheless using the best collection implementation that is available at runtime.
Constructor and Description |
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CollectionFactory() |
Modifier and Type | Method and Description |
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static <E> Collection<E> |
createApproximateCollection(Object collection,
int initialCapacity)
Create the most approximate collection for the given collection.
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static <K,V> Map<K,V> |
createApproximateMap(Object map,
int initialCapacity)
Create the most approximate map for the given map.
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static <E> Collection<E> |
createCollection(Class<?> collectionType,
int initialCapacity)
Create the most appropriate collection for the given collection type.
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static <K,V> Map<K,V> |
createMap(Class<?> mapType,
int initialCapacity)
Create the most approximate map for the given map.
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static boolean |
isApproximableCollectionType(Class<?> collectionType)
Determine whether the given collection type is an approximable type,
i.e.
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static boolean |
isApproximableMapType(Class<?> mapType)
Determine whether the given map type is an approximable type,
i.e.
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public static boolean isApproximableCollectionType(Class<?> collectionType)
createApproximateCollection(java.lang.Object, int)
can approximate.collectionType
- the collection type to checktrue
if the type is approximable,
false
if it is notpublic static <E> Collection<E> createApproximateCollection(Object collection, int initialCapacity)
Creates an ArrayList, TreeSet or linked Set for a List, SortedSet or Set, respectively.
collection
- the original Collection objectinitialCapacity
- the initial capacityArrayList
,
TreeSet
,
LinkedHashSet
public static <E> Collection<E> createCollection(Class<?> collectionType, int initialCapacity)
Creates an ArrayList, TreeSet or linked Set for a List, SortedSet or Set, respectively.
collectionType
- the desired type of the target CollectioninitialCapacity
- the initial capacityArrayList
,
TreeSet
,
LinkedHashSet
public static boolean isApproximableMapType(Class<?> mapType)
createApproximateMap(java.lang.Object, int)
can approximate.mapType
- the map type to checktrue
if the type is approximable,
false
if it is notpublic static <K,V> Map<K,V> createApproximateMap(Object map, int initialCapacity)
Creates a TreeMap or linked Map for a SortedMap or Map, respectively.
map
- the original Map objectinitialCapacity
- the initial capacityTreeMap
,
LinkedHashMap
public static <K,V> Map<K,V> createMap(Class<?> mapType, int initialCapacity)
Creates a TreeMap or linked Map for a SortedMap or Map, respectively.
mapType
- the desired type of the target MapinitialCapacity
- the initial capacityTreeMap
,
LinkedHashMap