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java.lang.Objectcom.sleepycat.collections.StoredContainer
com.sleepycat.collections.StoredCollection
com.sleepycat.collections.StoredKeySet
The Set returned by Map.keySet() and which can also be constructed directly if a Map is not needed. Since this collection is a set it only contains one element for each key, even when duplicates are allowed. Key set iterators are therefore particularly useful for enumerating the unique keys of a store or index that allows duplicates.
Note that this class does not conform to the standard Java collections interface in the following ways:
StoredContainer.size() method always throws
 UnsupportedOperationException because, for performance reasons,
 databases do not maintain their total record count.StoredIterator.close() or StoredIterator.close(java.util.Iterator)
 to release the underlying database cursor resources.
| Constructor Summary | |
| StoredKeySet(Database database,
             EntryBinding keyBinding,
             boolean writeAllowed)Creates a key set view of a Database. | |
| Method Summary | |
|  boolean | add(Object key)Adds the specified key to this set if it is not already present (optional operation). | 
|  boolean | contains(Object key)Returns true if this set contains the specified key. | 
|  boolean | remove(Object key)Removes the specified key from this set if it is present (optional operation). | 
| Methods inherited from class com.sleepycat.collections.StoredCollection | 
| addAll, containsAll, equals, hashCode, iterator, iterator, join, removeAll, retainAll, toArray, toArray, toList, toString | 
| Methods inherited from class com.sleepycat.collections.StoredContainer | 
| areDuplicatesAllowed, areDuplicatesOrdered, areKeysRenumbered, clear, isDirtyRead, isDirtyReadAllowed, isEmpty, isOrdered, isSecondary, isTransactional, isWriteAllowed, size | 
| Methods inherited from class java.lang.Object | 
| getClass, notify, notifyAll, wait, wait, wait | 
| Methods inherited from interface java.util.Set | 
| addAll, clear, containsAll, equals, hashCode, isEmpty, iterator, removeAll, retainAll, size, toArray, toArray | 
| Constructor Detail | 
public StoredKeySet(Database database,
                    EntryBinding keyBinding,
                    boolean writeAllowed)
Database.
database - is the Database underlying the new collection.keyBinding - is the binding used to translate between key buffers
 and key objects.writeAllowed - is true to create a read-write collection or false
 to create a read-only collection.
IllegalArgumentException - if formats are not consistently
 defined or a parameter is invalid.
RuntimeExceptionWrapper - if a DatabaseException is
 thrown.| Method Detail | 
public boolean add(Object key)
Set.add(java.lang.Object) interface.
add in interface SetUnsupportedOperationException - if the collection is indexed, or
 if the collection is read-only.
RuntimeExceptionWrapper - if a DatabaseException is
 thrown.public boolean remove(Object key)
Set.remove(java.lang.Object) interface.
remove in interface SetUnsupportedOperationException - if the collection is read-only.
RuntimeExceptionWrapper - if a DatabaseException is
 thrown.public boolean contains(Object key)
Set.contains(java.lang.Object) interface.
contains in interface SetRuntimeExceptionWrapper - if a DatabaseException is
 thrown.| 
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