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java.lang.Objectcom.sleepycat.collections.StoredContainer
com.sleepycat.collections.StoredCollection<K>
com.sleepycat.collections.StoredKeySet<K>
public class StoredKeySet<K>
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.
| Field Summary | 
|---|
| Fields inherited from class com.sleepycat.collections.StoredCollection | 
|---|
| DEFAULT_ITERATOR_BLOCK_SIZE | 
| Constructor Summary | |
|---|---|
| StoredKeySet(Database database,
             EntryBinding<K> keyBinding,
             boolean writeAllowed)Creates a key set view of a Database. | |
| Method Summary | |
|---|---|
|  boolean | add(K 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, getIteratorBlockSize, hashCode, iterator, iterator, join, removeAll, retainAll, setIteratorBlockSize, size, storedIterator, storedIterator, toArray, toArray, toList, toString | 
| Methods inherited from class com.sleepycat.collections.StoredContainer | 
|---|
| areDuplicatesAllowed, areDuplicatesOrdered, areKeyRangesAllowed, areKeysRenumbered, clear, getCursorConfig, isEmpty, isOrdered, isSecondary, isTransactional, isWriteAllowed | 
| Methods inherited from class java.lang.Object | 
|---|
| clone, finalize, getClass, notify, notifyAll, wait, wait, wait | 
| Methods inherited from interface java.util.Set | 
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| addAll, clear, containsAll, equals, hashCode, isEmpty, iterator, removeAll, retainAll, size, toArray, toArray | 
| Constructor Detail | 
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public StoredKeySet(Database database,
                    EntryBinding<K> 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 checked exception is thrown,
 including a DatabaseException on BDB (C Edition).| Method Detail | 
|---|
public boolean add(K key)
Set.add(E) interface.
 WARNING: When a key is added the value in the underlying data store will be empty, i.e., the byte array will be zero length. Such a record cannot be accessed using the Map interface unless the value binding supports zero length byte arrays.
add in interface Collection<K>add in interface Set<K>UnsupportedOperationException - if the collection is indexed, or
 if the collection is read-only.
RuntimeExceptionWrapper - if a checked exception is thrown,
 including a DatabaseException on BDB (C Edition).public boolean remove(Object key)
Set.remove(java.lang.Object) interface.
remove in interface Collection<K>remove in interface Set<K>UnsupportedOperationException - if the collection is read-only.
RuntimeExceptionWrapper - if a checked exception is thrown,
 including a DatabaseException on BDB (C Edition).public boolean contains(Object key)
Set.contains(java.lang.Object) interface.
contains in interface Collection<K>contains in interface Set<K>RuntimeExceptionWrapper - if a checked exception is thrown,
 including a DatabaseException on BDB (C Edition).| 
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