Package 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:
  `java.lang.Cloneable`, `java.lang.Iterable<E>`, `java.util.Collection<E>`, `java.util.Set<E>`

Direct Known Subclasses:
  `StoredSortedValueSet`

    public class StoredValueSet<E>
    extends StoredCollection<E>
    implements java.util.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

Constructors
`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

All Methods Instance Methods Concrete Methods
`boolean` `add​(E entity)` Adds the specified entity to this set if it is not already present (optional operation).
`boolean` `contains​(java.lang.Object value)` Returns true if this set contains the specified element.
`boolean` `remove​(java.lang.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.Collection

`parallelStream, removeIf, stream, toArray`

### Methods inherited from interface java.lang.Iterable

`forEach`

### Methods inherited from interface java.util.Set

`addAll, clear, containsAll, equals, hashCode, isEmpty, iterator, removeAll, retainAll, size, spliterator, 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:
  `java.lang.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:
  `java.lang.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 `java.util.Collection<E>`
Specified by:
  `add` in interface `java.util.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:
  `java.lang.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​(java.lang.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 `java.util.Collection<E>`
Specified by:
  `contains` in interface `java.util.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​(java.lang.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 `java.util.Collection<E>`
Specified by:
  `remove` in interface `java.util.Set<E>`
Throws:
  `java.lang.UnsupportedOperationException` - if the collection is read-only.
  `RuntimeExceptionWrapper` - if a checked exception is thrown, including a `DatabaseException` on BDB (C Edition).