Java representation of a native Elektra key set, a container for keys. More...

Inherits AbstractSet< Key >, and NavigableSet< Key >.

Public Member Functions
void	release ()
	Clean-up method to release key set reference by trying to free the native reference Call this method if you have obtained a KeySet via any of its public methods or {} and you do not longer need it. More...

KeySet	dup ()
	Duplicates the key set. More...

KeySet	copy (KeySet source)
	Copies key references from. More...

KeySet	append (Key key)
	Append key to key set. More...

KeySet	append (KeySet source)
	Appends keys from key set. More...

KeySet	cut (Key cutpoint)
	Creates new key set with help of a cut point. More...

Optional< Key >	remove (ReadableKey key)
	Removes the specified key from key set. More...

Optional< Key >	remove (String find)
	Removes the key with the specified name from key set. More...

Key	remove (int cursor)
	Returns key from key set and also removes it from the set. More...

Key	at (int cursor)
	Gets the key at the given cursor position. More...

int	indexOf (Key key)

Optional< Key >	lookup (Key find)
	Search for a key in the key set. More...

Optional< Key >	lookup (String find)
	Search for a key in the key set. More...

String	toString ()
	Iterates though all keys in this key set and appends their representation to the output. More...

int	size ()

boolean	isEmpty ()

boolean	contains (@Nullable Object o)

Key	lower (Key key)

Key	floor (Key key)

Key	ceiling (Key key)

Key	higher (Key key)

Key	pollFirst ()

Key	pollLast ()

Iterator< Key >	iterator ()

NavigableSet< Key >	descendingSet ()

Iterator< Key >	descendingIterator ()

NavigableSet< Key >	subSet (Key fromElement, boolean fromInclusive, Key toElement, boolean toInclusive)

NavigableSet< Key >	headSet (Key toElement, boolean inclusive)

NavigableSet< Key >	tailSet (Key fromElement, boolean inclusive)

Object[]	toArray ()

boolean	add (Key e)

boolean	remove (Object o)

boolean	containsAll (Collection<?> c)

boolean	addAll (Collection<? extends Key > c)

boolean	retainAll (Collection<?> c)

boolean	removeAll (Collection<?> c)

void	clear ()
	Removes all elements form this KeySet. More...

Comparator<? super Key >	comparator ()

SortedSet< Key >	subSet (Key fromElement, Key toElement)

SortedSet< Key >	headSet (Key toElement)

SortedSet< Key >	tailSet (Key fromElement)

Key	first ()

Key	last ()

Static Public Member Functions
static KeySet	create (Key... keys)
	Constructs a new KeySet containing the specified keys Example: KeySet keySet = KeySet.create(Key.create("A"), Key.create("B"));. More...

static KeySet	create (int allocationHint, Key... keys)
	Constructs a new KeySet containing the specified keys Example: KeySet keySet = KeySet.create(10, Key.create("A"), Key.create("B"));. More...

static KeySet	create ()
	Constructs an empty KeySet with a default allocation hint of 16. More...

Protected Member Functions
	KeySet (long nativePointer)
	Constructor associating a new KeySet instance with a native pointer in long format. More...

	KeySet (long nativePointer, boolean suppressCleanUp)
	Constructor associating a new KeySet instance with a native pointer in long format Suppressing clean-up has been introduced for usage of this binding as JNI plug-in and should normally not be used in any other case. More...

	KeySet (Pointer pointer)
	Constructor associating a new KeySet instance with a JNA pointer. More...

Pointer	getPointer ()

Detailed Description

Java representation of a native Elektra key set, a container for keys.

Constructor & Destructor Documentation

◆ KeySet() [1/3]

org.libelektra.KeySet.KeySet ( long nativePointer )

inlineprotected

Constructor associating a new KeySet instance with a native pointer in long format.

Parameters

nativePointer Native pointer to key set in long format

◆ KeySet() [2/3]

org.libelektra.KeySet.KeySet	(	long	nativePointer,
		boolean	suppressCleanUp
	)

inlineprotected

Constructor associating a new KeySet instance with a native pointer in long format

Suppressing clean-up has been introduced for usage of this binding as JNI plug-in and should normally not be used in any other case.

Parameters

nativePointer	Native pointer to key set in long format
suppressCleanUp	True to suppress native reference clean-up as soon as this {} instance becomes phantom reachable, false otherwise #release()

◆ KeySet() [3/3]

org.libelektra.KeySet.KeySet ( Pointer pointer )

inlineprotected

Constructor associating a new KeySet instance with a JNA pointer.

Parameters

pointer JNA Pointer to key set

Exceptions

IllegalArgumentException

if

pointer

is

null

See also: release()

Member Function Documentation

◆ add()

boolean org.libelektra.KeySet.add ( Key e )

inline

Exceptions

IllegalStateException	if this KeySet or the specified key has already been released
NullPointerException	if key is null
KeySetException	if inserting the key failed because of allocation problems

See also: append(Key)

◆ addAll()

boolean org.libelektra.KeySet.addAll ( Collection<? extends Key > c )

inline

Exceptions

IllegalStateException	if this KeySet or any Key contained in the specified collection c has already been released
NullPointerException	if the specified collection is null or contains null elements
KeySetException	if inserting the key failed because of allocation problems

◆ append() [1/2]

KeySet org.libelektra.KeySet.append ( Key key )

inline

Append key to key set.

Parameters

key	Key to append

Returns: This KeySet, enabling a fluent interface

Exceptions

IllegalStateException	if this KeySet or the specified key has already been released
IllegalArgumentException	if key is null
KeySetException	if appending the key failed because of allocation problems

See also: add(Key)

◆ append() [2/2]

KeySet org.libelektra.KeySet.append ( KeySet source )

inline

Appends keys from key set.

Parameters

source Source KeySet to append all of its keys

Returns: This KeySet, enabling a fluent interface

Exceptions

IllegalStateException	if this KeySet or the specified source has already been released
IllegalArgumentException	if source is null
KeySetException	if appending the source failed because of allocation problems

◆ at()

Key org.libelektra.KeySet.at ( int cursor )

inline

Gets the key at the given cursor position.

Parameters

cursor Cursor position used to fetch key; starting from 0

Returns: Key found at specified cursor position

Exceptions

IllegalStateException	if this KeySet has already been released
IndexOutOfBoundsException	if position is out of bounds

See also: Key::release()

◆ ceiling()

Key org.libelektra.KeySet.ceiling ( Key key )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ clear()

void org.libelektra.KeySet.clear ( )

inline

Removes all elements form this KeySet.

Exceptions

IllegalStateException if this KeySet has already been released

◆ comparator()

Comparator<? super Key> org.libelektra.KeySet.comparator ( )

inline

@implSpec Returns

null

because natural ordering of keys is used (ReadableKey implements Comparable)

Exceptions

IllegalStateException if this KeySet has already been released

◆ contains()

boolean org.libelektra.KeySet.contains ( @Nullable Object o )

inline

Exceptions

IllegalStateException	if this KeySet has already been released or the passed o is a Key that has already been released
NullPointerException	if the specified element o is null

See also: lookup(Key)

◆ containsAll()

boolean org.libelektra.KeySet.containsAll ( Collection<?> c )

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if the specified collection is null or contains null elements

◆ copy()

KeySet org.libelektra.KeySet.copy ( KeySet source )

inline

Copies key references from.

source

to this KeySet

Parameters

source Key set that is used as source

Returns: This KeySet, enabling a fluent interface

Exceptions

IllegalStateException	if this KeySet or the specified source has already been released
IllegalArgumentException	if source is null

◆ create() [1/3]

static KeySet org.libelektra.KeySet.create ( )

inlinestatic

Constructs an empty KeySet with a default allocation hint of 16.

Returns: Newly allocated key set

Exceptions

KeySetException on allocation problems

See also: release()

◆ create() [2/3]

static KeySet org.libelektra.KeySet.create	(	int	allocationHint,
		Key...	keys
	)

inlinestatic

Constructs a new KeySet containing the specified keys

Example: KeySet keySet = KeySet.create(10, Key.create("A"), Key.create("B"));.

Parameters

allocationHint	Hint indicating the expected size of the key set
keys	List of initial keys for the key set

Returns: New key set containing the specified initial keys

Exceptions

KeySetException on allocation problems

See also: release()

◆ create() [3/3]

static KeySet org.libelektra.KeySet.create ( Key... keys )

inlinestatic

Constructs a new KeySet containing the specified keys

Example: KeySet keySet = KeySet.create(Key.create("A"), Key.create("B"));.

Parameters

keys	List of initial keys for the key set

Returns: New key set containing the specified initial keys

Exceptions

KeySetException on allocation problems

See also: release()

◆ cut()

KeySet org.libelektra.KeySet.cut ( Key cutpoint )

inline

Creates new key set with help of a cut point.

Parameters

cutpoint Key that is used as cutting point

Returns: New KeySet containing all keys until the cutting point

Exceptions

IllegalStateException	if this KeySet has already been released
IllegalArgumentException	if cutpoint is null
KeySetException	if cutpoint is missing a key name or on allocation problems

See also: release()

◆ descendingIterator()

Iterator<Key> org.libelektra.KeySet.descendingIterator ( )

inline

Returns: New DescendingKeySetIterator backed by this KeySet

◆ descendingSet()

NavigableSet<Key> org.libelektra.KeySet.descendingSet ( )

inline

Returns: New DescendingKeySetView backed by this KeySet

◆ dup()

KeySet org.libelektra.KeySet.dup ( )

inline

Duplicates the key set.

Returns: New KeySet containing the same key references as this KeySet does

Exceptions

IllegalStateException if this KeySet has already been released

See also: release()

◆ first()

Key org.libelektra.KeySet.first ( )

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NoSuchElementException

See also: Key::release()

◆ floor()

Key org.libelektra.KeySet.floor ( Key key )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ getPointer()

Pointer org.libelektra.KeySet.getPointer ( )

inlineprotected

Returns: JNA pointer to the native pointer for this key set

Exceptions

IllegalStateException if this KeySet has already been released

◆ headSet() [1/2]

SortedSet<Key> org.libelektra.KeySet.headSet ( Key toElement )

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if toElement is null
IllegalArgumentException

◆ headSet() [2/2]

NavigableSet<Key> org.libelektra.KeySet.headSet	(	Key	toElement,
		boolean	inclusive
	)

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if toElement is null
IllegalArgumentException

◆ higher()

Key org.libelektra.KeySet.higher ( Key key )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ indexOf()

int org.libelektra.KeySet.indexOf ( Key key )

inline

Parameters

key	Key to look for

Returns: Index of the
key

in this KeySet

Exceptions

IllegalStateException	if KeySet or key has already been released
IllegalArgumentException	if key was not found in this KeySet

◆ isEmpty()

boolean org.libelektra.KeySet.isEmpty ( )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ iterator()

Iterator<Key> org.libelektra.KeySet.iterator ( )

inline

Returns: New KeySetIterator backed by this KeySet

◆ last()

Key org.libelektra.KeySet.last ( )

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NoSuchElementException

See also: Key::release()

◆ lookup() [1/2]

Optional<Key> org.libelektra.KeySet.lookup ( Key find )

inline

Search for a key in the key set.

Parameters

find	Key used in search

Returns: Key if search successful, Optional#empty() otherwise

Exceptions

IllegalStateException	if this KeySet has already been released
IllegalArgumentException	if key is null

See also: Key::release(); #contains(Object)

◆ lookup() [2/2]

Optional<Key> org.libelektra.KeySet.lookup ( String find )

inline

Search for a key in the key set.

Parameters

find	Key name used in search

Returns: Key if search successful, Optional#empty() otherwise

Exceptions

IllegalStateException	if this KeySet has already been released
IllegalArgumentException	if find is blank

See also: Key::release()

◆ lower()

Key org.libelektra.KeySet.lower ( Key key )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ pollFirst()

Key org.libelektra.KeySet.pollFirst ( )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ pollLast()

Key org.libelektra.KeySet.pollLast ( )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ release()

void org.libelektra.KeySet.release ( )

inline

Clean-up method to release key set reference by trying to free the native reference

Call this method if you have obtained a KeySet via any of its public methods or {} and you do not longer need it.

If you do not manually release such key sets, they will get cleaned up by garbage collection as soon as they get phantom reachable. Therefore its encouraged to release key set instances as soon as you do not use them anymore.

◆ remove() [1/4]

Key org.libelektra.KeySet.remove ( int cursor )

inline

Returns key from key set and also removes it from the set.

Parameters

cursor Cursor position of the key to remove; starting from 0

Returns: Key found at given cursor position

Exceptions

IllegalStateException	if this KeySet has already been released
IndexOutOfBoundsException	if position is out of bounds

See also: Key::release()

◆ remove() [2/4]

boolean org.libelektra.KeySet.remove ( Object o )

inline

Exceptions

IllegalStateException if this KeySet has already been released

See also: remove(ReadableKey)

◆ remove() [3/4]

Optional<Key> org.libelektra.KeySet.remove ( ReadableKey key )

inline

Removes the specified key from key set.

Parameters

key	Key to remove

Returns: Removed Key from the key set, matching the specified
key

's name. May or may not reference the same native key resource. Optional#empty() if the specified
key

was not found.

Exceptions

IllegalStateException	if KeySet or key has already been released
IllegalArgumentException	if key is null

See also: remove(Object)

◆ remove() [4/4]

Optional<Key> org.libelektra.KeySet.remove ( String find )

inline

Removes the key with the specified name from key set.

Parameters

find	Name of the key to remove

Returns: Removed Key from the key set, matching the specified
key

's name. {} if the no key matching the specified name was not found. IllegalStateException if this KeySet} has already been released IllegalArgumentException if find is String#isBlank() blank}

◆ removeAll()

boolean org.libelektra.KeySet.removeAll ( Collection<?> c )

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if the specified collection is null or contains null elements

◆ retainAll()

boolean org.libelektra.KeySet.retainAll ( Collection<?> c )

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if the specified collection is null or contains null elements

◆ size()

int org.libelektra.KeySet.size ( )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ subSet() [1/2]

NavigableSet<Key> org.libelektra.KeySet.subSet	(	Key	fromElement,
		boolean	fromInclusive,
		Key	toElement,
		boolean	toInclusive
	)

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if fromElement or toElement is null
IllegalArgumentException

◆ subSet() [2/2]

SortedSet<Key> org.libelektra.KeySet.subSet	(	Key	fromElement,
		Key	toElement
	)

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if fromElement or toElement is null
IllegalArgumentException

◆ tailSet() [1/2]

SortedSet<Key> org.libelektra.KeySet.tailSet ( Key fromElement )

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if fromElement is null
IllegalArgumentException

◆ tailSet() [2/2]

NavigableSet<Key> org.libelektra.KeySet.tailSet	(	Key	fromElement,
		boolean	inclusive
	)

inline

Exceptions

IllegalStateException	if this KeySet has already been released
NullPointerException	if fromElement is null
IllegalArgumentException

◆ toArray()

Object [] org.libelektra.KeySet.toArray ( )

inline

Exceptions

IllegalStateException if this KeySet has already been released

◆ toString()

String org.libelektra.KeySet.toString ( )

inline

Iterates though all keys in this key set and appends their representation to the output.

Uses the toString() function of the Key objects.

Returns: Represents this KeySet as string

The documentation for this class was generated from the following file:

KeySet.java

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ KeySet() [1/3]

◆ KeySet() [2/3]

◆ KeySet() [3/3]

Member Function Documentation

◆ add()

◆ addAll()

◆ append() [1/2]

◆ append() [2/2]

◆ at()

◆ ceiling()

◆ clear()

◆ comparator()

◆ contains()

◆ containsAll()

◆ copy()

◆ create() [1/3]

◆ create() [2/3]

◆ create() [3/3]

◆ cut()

◆ descendingIterator()

◆ descendingSet()

◆ dup()

◆ first()

◆ floor()

◆ getPointer()

◆ headSet() [1/2]

◆ headSet() [2/2]

◆ higher()

◆ indexOf()

◆ isEmpty()

◆ iterator()

◆ last()

◆ lookup() [1/2]

◆ lookup() [2/2]

◆ lower()

◆ pollFirst()

◆ pollLast()

◆ release()

◆ remove() [1/4]

◆ remove() [2/4]

◆ remove() [3/4]

◆ remove() [4/4]

◆ removeAll()

◆ retainAll()

◆ size()

◆ subSet() [1/2]

◆ subSet() [2/2]

◆ tailSet() [1/2]

◆ tailSet() [2/2]

◆ toArray()

◆ toString()