com.sleepycat.collections

Class StoredEntrySet<K,V>

java.lang.Object

com.sleepycat.collections.StoredContainer

com.sleepycat.collections.StoredCollection<Map.Entry<K,V>>

com.sleepycat.collections.StoredEntrySet<K,V>

All Implemented Interfaces:

Cloneable, Iterable<Map.Entry<K,V>>, Collection<Map.Entry<K,V>>, Set<Map.Entry<K,V>>

Direct Known Subclasses:

StoredSortedEntrySet

public class StoredEntrySet<K,V>
extends StoredCollection<Map.Entry<K,V>>
implements Set<Map.Entry<K,V>>

The Set returned by Map.entrySet(). This class may not be instantiated directly. Contrary to what is stated by Map.entrySet() this class does support the add(java.util.Map.Entry<K, V>) and StoredCollection.addAll(java.util.Collection<? extends E>) methods.

The Map.Entry.setValue(V) method of the Map.Entry objects that are returned by this class and its iterators behaves just as the StoredIterator.set(E) method does.

Author:

Mark Hayes

Field Summary

Fields inherited from class com.sleepycat.collections.StoredCollection

DEFAULT_ITERATOR_BLOCK_SIZE

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(Map.Entry<K,V> mapEntry) Adds the specified element to this set if it is not already present (optional operation).
boolean	contains(Object mapEntry) Returns true if this set contains the specified element.
boolean	remove(Object mapEntry) Removes the specified element from this set if it is present (optional operation).
String	toString() Converts the collection to a string representation for debugging.

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

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

Method Detail

add

public boolean add(Map.Entry<K,V> mapEntry)

Adds the specified element 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<Map.Entry<K,V>>

Specified by:

add in interface Set<Map.Entry<K,V>>

Parameters:

mapEntry - must be a Map.Entry instance.

Returns:

true if the key-value pair was added to the set (and was not previously present).

Throws:

OperationFailureException - if one of the Write Operation Failures occurs.

EnvironmentFailureException - if an unexpected, internal or environment-wide failure occurs.

UnsupportedOperationException - if the collection is read-only.

ClassCastException - if the mapEntry is not a Map.Entry instance.

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

remove

public boolean remove(Object mapEntry)

Removes the specified element from this set if it is present (optional operation). This method conforms to the Set.remove(java.lang.Object) interface.

Specified by:

remove in interface Collection<Map.Entry<K,V>>

Specified by:

remove in interface Set<Map.Entry<K,V>>

Parameters:

mapEntry - is a Map.Entry instance to be removed.

Returns:

true if the key-value pair was removed from the set, or false if the mapEntry is not a Map.Entry instance or is not present in the set.

Throws:

OperationFailureException - if one of the Write Operation Failures occurs.

EnvironmentFailureException - if an unexpected, internal or environment-wide failure occurs.

UnsupportedOperationException - if the collection is read-only.

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

contains

public boolean contains(Object mapEntry)

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<Map.Entry<K,V>>

Specified by:

contains in interface Set<Map.Entry<K,V>>

Parameters:

mapEntry - is a Map.Entry instance to be checked.

Returns:

true if the key-value pair is present in the set, or false if the mapEntry is not a Map.Entry instance or is not present in the set.

Throws:

OperationFailureException - if one of the Read Operation Failures occurs.

EnvironmentFailureException - if an unexpected, internal or environment-wide failure occurs.

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

toString

public String toString()

Description copied from class: StoredCollection

Converts the collection to a string representation for debugging. WARNING: The returned string may be very large.

Overrides:

toString in class StoredCollection<Map.Entry<K,V>>

Returns:

the string representation.