Class Collections

java.lang.Object
net.okapia.osid.torrefacto.collect.Collections
public class Collections extends Object
Static factory methods for MultiMap, mirroring the wrappers Collections provides for the standard collections. It supplies synchronized and unmodifiable views of a multimap.

  • Constructor Details

    • Collections

      protected Collections()
      java.util.Collections has a private constructor so it can't be extended. This one is protected only so the class cannot be instantiated directly; it holds no state.

  • Method Details

    • synchronizedMultiMap

      public static <K,V> MultiMap<K,V> synchronizedMultiMap(MultiMap<K,V> m)
      Returns a synchronized (thread-safe) map backed by the specified map. In order to guarantee serial access, it is critical that all access to the backing map is accomplished through the returned map.
      Type Parameters:
      K - the key type
      V - the value type
      Parameters:
      m - the map to be "wrapped" in a synchronized map
      Returns:
      a synchronized view of the specified map

    • unmodifiableMultiMap

      public static <K,V> MultiMap<K,V> unmodifiableMultiMap(MultiMap<K,V> m)
      Returns an unmodifiable view of the specified map. This method allows modules to provide users with "read-only" access to internal maps. Query operations on the returned map "read through" to the specified map, and attempts to modify the returned map, whether direct or via its collection views, result in an UnsupportedOperationException.
      Type Parameters:
      K - the key type
      V - the value type
      Parameters:
      m - the map for which an unmodifiable view is to be returned
      Returns:
      an unmodifiable view of the specified map