com.db4o.foundation

Class Collection4<T>

java.lang.Object

com.db4o.foundation.Collection4<T>

All Implemented Interfaces:

DeepClone, Iterable4<T>, Sequence4<T>, Unversioned

public class Collection4<T>
extends java.lang.Object
implements Sequence4<T>, Iterable4<T>, DeepClone, Unversioned

Fast linked list for all usecases.

Constructor Summary

Constructors

Constructor and Description
Collection4()
Collection4(int initialLength) For jdk11 compatibility only.
Collection4(Iterable4<T> other)
Collection4(Iterator4<T> iterator)
Collection4(T[] elements)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(T element) Adds an element to the end of this collection.
void	addAll(Iterable4<T> other)
void	addAll(Iterator4<T> iterator)
void	addAll(T[] elements)
void	clear()
boolean	contains(T element)
boolean	containsAll(Iterable4<T> iter)
boolean	containsAll(Iterator4<T> iter)
boolean	containsByIdentity(T element) tests if the object is in the Collection.
java.lang.Object	deepClone(java.lang.Object newParent) The parameter allows passing one new object so parent references can be corrected on children.
T	ensure(T element) makes sure the passed object is in the Collection.
T	get(int index)
T	get(T element) returns the first object found in the Collections that equals() the passed object
int	indexOf(T obj)
boolean	isEmpty()
Iterator4<T>	iterator() Iterates through the collection in reversed insertion order which happens to be the fastest.
void	prepend(T element)
boolean	remove(T a_object) removes an object from the Collection equals() comparison returns the removed object or null, if none found
void	removeAll(Iterable4<T> iterable) Removes all the elements from this collection that are returned by iterable.
void	removeAll(Iterator4<T> iterator) Removes all the elements from this collection that are returned by iterator.
void	replace(T oldObject, T newObject)
void	replaceByIdentity(T oldObject, T newObject)
T	singleElement()
int	size()
java.lang.Object[]	toArray()
T[]	toArray(T[] array) This is a non reflection implementation for more speed.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Collection4

public Collection4()

Collection4

public Collection4(int initialLength)

For jdk11 compatibility only.

Collection4

public Collection4(T[] elements)

Collection4

public Collection4(Iterable4<T> other)

Collection4

public Collection4(Iterator4<T> iterator)

Method Detail

singleElement

public T singleElement()

add

public final boolean add(T element)

Adds an element to the end of this collection.

Specified by:

add in interface Sequence4<T>

Parameters:

element -

prepend

public final void prepend(T element)

addAll

public final void addAll(T[] elements)

addAll

public final void addAll(Iterable4<T> other)

Specified by:

addAll in interface Sequence4<T>

addAll

public final void addAll(Iterator4<T> iterator)

clear

public final void clear()

Specified by:

clear in interface Sequence4<T>

contains

public final boolean contains(T element)

Specified by:

contains in interface Sequence4<T>

containsAll

public boolean containsAll(Iterable4<T> iter)

Specified by:

containsAll in interface Sequence4<T>

containsAll

public boolean containsAll(Iterator4<T> iter)

containsByIdentity

public final boolean containsByIdentity(T element)

tests if the object is in the Collection. == comparison.

get

public final T get(T element)

returns the first object found in the Collections that equals() the passed object

deepClone

public java.lang.Object deepClone(java.lang.Object newParent)

Description copied from interface: DeepClone

The parameter allows passing one new object so parent references can be corrected on children.

Specified by:

deepClone in interface DeepClone

ensure

public final T ensure(T element)

makes sure the passed object is in the Collection. equals() comparison.

iterator

public final Iterator4<T> iterator()

Iterates through the collection in reversed insertion order which happens to be the fastest.

Specified by:

iterator in interface Iterable4<T>

Returns:

get

public T get(int index)

Specified by:

get in interface Sequence4<T>

removeAll

public void removeAll(Iterable4<T> iterable)

Removes all the elements from this collection that are returned by iterable.

Parameters:

iterable -

removeAll

public void removeAll(Iterator4<T> iterator)

Removes all the elements from this collection that are returned by iterator.

remove

public boolean remove(T a_object)

removes an object from the Collection equals() comparison returns the removed object or null, if none found

Specified by:

remove in interface Sequence4<T>

replace

public void replace(T oldObject,
           T newObject)

replaceByIdentity

public void replaceByIdentity(T oldObject,
                     T newObject)

size

public final int size()

Specified by:

size in interface Sequence4<T>

indexOf

public int indexOf(T obj)

isEmpty

public final boolean isEmpty()

Specified by:

isEmpty in interface Sequence4<T>

toArray

public final T[] toArray(T[] array)

This is a non reflection implementation for more speed. In contrast to the JDK behaviour, the passed array has to be initialized to the right length.

Specified by:

toArray in interface Sequence4<T>

toArray

public final java.lang.Object[] toArray()

Specified by:

toArray in interface Sequence4<T>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object