com.sleepycat.collections
Class StoredValueSet<E>

java.lang.Object
  com.sleepycat.collections.StoredContainer
      com.sleepycat.collections.StoredCollection<E>
          com.sleepycat.collections.StoredValueSet<E>

All Implemented Interfaces:

Cloneable, Iterable<E>, Collection<E>, Set<E>

Direct Known Subclasses:

StoredSortedValueSet

public class StoredValueSet<E>
extends StoredCollection<E>
implements Set<E>

The Set returned by Map.values() and Map.duplicates(), and which can also be constructed directly if a Map is not needed. Although this collection is a set it may contain duplicate values. Only if an entity value binding is used are all elements guaranteed to be unique.

Field Summary

Fields inherited from class com.sleepycat.collections.StoredCollection

DEFAULT_ITERATOR_BLOCK_SIZE

Constructor Summary

StoredValueSet(Database database, EntityBinding<E> valueEntityBinding, boolean writeAllowed)
Creates a value set entity view of a Database.

StoredValueSet(Database database, EntryBinding<E> valueBinding, boolean writeAllowed)
Creates a value set view of a Database.

Method Summary

boolean	add(E entity) Adds the specified entity to this set if it is not already present (optional operation).
boolean	contains(Object value) Returns true if this set contains the specified element.
boolean	remove(Object value) Removes the specified value 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

addAll, clear, containsAll, equals, hashCode, isEmpty, iterator, removeAll, retainAll, size, toArray, toArray

Constructor Detail

StoredValueSet

public StoredValueSet(Database database,
                      EntryBinding<E> valueBinding,
                      boolean writeAllowed)

Creates a value set view of a Database.

Parameters:

database - is the Database underlying the new collection.

valueBinding - is the binding used to translate between value buffers and value objects.

writeAllowed - is true to create a read-write collection or false to create a read-only collection.

Throws:

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).

StoredValueSet

public StoredValueSet(Database database,
                      EntityBinding<E> valueEntityBinding,
                      boolean writeAllowed)

Creates a value set entity view of a Database.

Parameters:

database - is the Database underlying the new collection.

valueEntityBinding - is the binding used to translate between key/value buffers and entity value objects.

writeAllowed - is true to create a read-write collection or false to create a read-only collection.

Throws:

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

add

public boolean add(E entity)

Adds the specified entity to this set if it is not already present (optional operation). This method conforms to the Set.add(E) interface.

Specified by:

add in interface Collection<E>

Specified by:

add in interface Set<E>

Parameters:

entity - is the entity to be added.

Returns:

true if the entity was added, that is the key-value pair represented by the entity was not previously present in the collection.

Throws:

UnsupportedOperationException - if the collection is read-only, if the collection is indexed, or if an entity binding is not used.

RuntimeExceptionWrapper - if a checked exception is thrown, including a DatabaseException on BDB (C Edition).

contains

public boolean contains(Object value)

Returns true if this set contains the specified element. This method conforms to the Set.contains(java.lang.Object) interface.

Specified by:

contains in interface Collection<E>

Specified by:

contains in interface Set<E>

Parameters:

value - the value to check.

Returns:

whether the set contains the given value.

Throws:

RuntimeExceptionWrapper - if a checked exception is thrown, including a DatabaseException on BDB (C Edition).

remove

public boolean remove(Object value)

Removes the specified value from this set if it is present (optional operation). If an entity binding is used, the key-value pair represented by the given entity is removed. If an entity binding is used, the first occurrence of a key-value pair with the given value is removed. This method conforms to the Set.remove(java.lang.Object) interface.

Specified by:

remove in interface Collection<E>

Specified by:

remove in interface Set<E>

Throws:

UnsupportedOperationException - if the collection is read-only.

RuntimeExceptionWrapper - if a checked exception is thrown, including a DatabaseException on BDB (C Edition).