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com.sleepycat.collections
Class StoredList

java.lang.Object
  com.sleepycat.collections.StoredContainer
      com.sleepycat.collections.StoredCollection
          com.sleepycat.collections.StoredList

All Implemented Interfaces:

Cloneable, Collection, List

public class StoredList

extends StoredCollection

implements List

A List view of a Database.

For all stored lists the keys of the underlying Database must have record number format, and therefore the store or index must be a RECNO, RECNO-RENUMBER, QUEUE, or BTREE-RECNUM database. Only RECNO-RENUMBER allows true list behavior where record numbers are renumbered following the position of an element that is added or removed. For the other access methods (RECNO, QUEUE, and BTREE-RECNUM), stored Lists are most useful as read-only collections where record numbers are not required to be sequential.

Note that this class does not conform to the standard Java collections interface in the following ways:

• The StoredContainer.size() method always throws UnsupportedOperationException because, for performance reasons, databases do not maintain their total record count.
• All iterators must be explicitly closed using StoredIterator.close() or StoredIterator.close(java.util.Iterator) to release the underlying database cursor resources.

In addition to the standard List methods, this class provides the following methods for stored lists only. Note that the use of these methods is not compatible with the standard Java collections interface.

• append(Object)

Constructor Summary

StoredList(Database database, EntityBinding valueEntityBinding, boolean writeAllowed)
Creates a list entity view of a Database.

StoredList(Database database, EntityBinding valueEntityBinding, PrimaryKeyAssigner keyAssigner)
Creates a list entity view of a Database with a PrimaryKeyAssigner.

StoredList(Database database, EntryBinding valueBinding, boolean writeAllowed)
Creates a list view of a Database.

StoredList(Database database, EntryBinding valueBinding, PrimaryKeyAssigner keyAssigner)
Creates a list view of a Database with a PrimaryKeyAssigner.

Method Summary

void	add(int index, Object value) Inserts the specified element at the specified position in this list (optional operation).
boolean	add(Object value) Appends the specified element to the end of this list (optional operation).
boolean	addAll(int index, Collection coll) Inserts all of the elements in the specified collection into this list at the specified position (optional operation).
int	append(Object value) Appends a given value returning the newly assigned index.
boolean	contains(Object value) Returns true if this list contains the specified element.
boolean	equals(Object other) Compares the specified object with this list for equality.
Object	get(int index) Returns the element at the specified position in this list.
int	hashCode()
int	indexOf(Object value) Returns the index in this list of the first occurrence of the specified element, or -1 if this list does not contain this element.
int	lastIndexOf(Object value) Returns the index in this list of the last occurrence of the specified element, or -1 if this list does not contain this element.
ListIterator	listIterator() Returns a list iterator of the elements in this list (in proper sequence).
ListIterator	listIterator(int index) Returns a list iterator of the elements in this list (in proper sequence), starting at the specified position in this list.
Object	remove(int index) Removes the element at the specified position in this list (optional operation).
boolean	remove(Object value) Removes the first occurrence in this list of the specified element (optional operation).
Object	set(int index, Object value) Replaces the element at the specified position in this list with the specified element (optional operation).
List	subList(int fromIndex, int toIndex) Returns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive.

Methods inherited from class com.sleepycat.collections.StoredCollection

addAll, containsAll, iterator, iterator, join, removeAll, retainAll, toArray, toArray, toList, toString

Methods inherited from class com.sleepycat.collections.StoredContainer

areDuplicatesAllowed, areDuplicatesOrdered, areKeysRenumbered, clear, getCursorConfig, isDirtyRead, isDirtyReadAllowed, isEmpty, isOrdered, isSecondary, isTransactional, isWriteAllowed, size

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

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

Constructor Detail

StoredList

public StoredList(Database database,
                  EntryBinding valueBinding,
                  boolean writeAllowed)

Creates a list 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 DatabaseException is thrown.

StoredList

public StoredList(Database database,
                  EntityBinding valueEntityBinding,
                  boolean writeAllowed)

Creates a list 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 DatabaseException is thrown.

StoredList

public StoredList(Database database,
                  EntryBinding valueBinding,
                  PrimaryKeyAssigner keyAssigner)

Creates a list view of a Database with a PrimaryKeyAssigner. Writing is allowed for the created list.

Parameters:

database - is the Database underlying the new collection.

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

keyAssigner - is used by the add(int, java.lang.Object) and append(java.lang.Object) methods to assign primary keys.

Throws:

IllegalArgumentException - if formats are not consistently defined or a parameter is invalid.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

StoredList

public StoredList(Database database,
                  EntityBinding valueEntityBinding,
                  PrimaryKeyAssigner keyAssigner)

Creates a list entity view of a Database with a PrimaryKeyAssigner. Writing is allowed for the created list.

Parameters:

database - is the Database underlying the new collection.

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

keyAssigner - is used by the add(int, java.lang.Object) and append(java.lang.Object) methods to assign primary keys.

Throws:

IllegalArgumentException - if formats are not consistently defined or a parameter is invalid.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

Method Detail

add

public void add(int index,
                Object value)

Inserts the specified element at the specified position in this list (optional operation). This method conforms to the List.add(int, Object) interface.

Specified by:

add in interface List

Throws:

UnsupportedOperationException - if the collection is a sublist, or if the collection is indexed, or if the collection is read-only, or if the RECNO-RENUMBER access method was not used.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

add

public boolean add(Object value)

Appends the specified element to the end of this list (optional operation). This method conforms to the List.add(Object) interface.

Specified by:

add in interface List

Throws:

UnsupportedOperationException - if the collection is a sublist, or if the collection is indexed, or if the collection is read-only, or if the RECNO-RENUMBER access method was not used.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

append

public int append(Object value)

Appends a given value returning the newly assigned index. If a PrimaryKeyAssigner is associated with Store for this list, it will be used to assigned the returned index. Otherwise the Store must be a QUEUE or RECNO database and the next available record number is assigned as the index. This method does not exist in the standard List interface.

Parameters:

value - the value to be appended.

Returns:

the assigned index.

Throws:

UnsupportedOperationException - if the collection is indexed, or if the collection is read-only, or if the Store has no PrimaryKeyAssigner and is not a QUEUE or RECNO database.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

addAll

public boolean addAll(int index,
                      Collection coll)

Inserts all of the elements in the specified collection into this list at the specified position (optional operation). This method conforms to the List.addAll(int, Collection) interface.

Specified by:

addAll in interface List

Throws:

UnsupportedOperationException - if the collection is a sublist, or if the collection is indexed, or if the collection is read-only, or if the RECNO-RENUMBER access method was not used.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

contains

public boolean contains(Object value)

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

Specified by:

contains in interface List

Throws:

RuntimeExceptionWrapper - if a DatabaseException is thrown.

get

public Object get(int index)

Returns the element at the specified position in this list. This method conforms to the List.get(int) interface.

Specified by:

get in interface List

Throws:

RuntimeExceptionWrapper - if a DatabaseException is thrown.

indexOf

public int indexOf(Object value)

Returns the index in this list of the first occurrence of the specified element, or -1 if this list does not contain this element. This method conforms to the List.indexOf(java.lang.Object) interface.

Specified by:

indexOf in interface List

Throws:

RuntimeExceptionWrapper - if a DatabaseException is thrown.

lastIndexOf

public int lastIndexOf(Object value)

Returns the index in this list of the last occurrence of the specified element, or -1 if this list does not contain this element. This method conforms to the List.lastIndexOf(java.lang.Object) interface.

Specified by:

lastIndexOf in interface List

Throws:

RuntimeExceptionWrapper - if a DatabaseException is thrown.

listIterator

public ListIterator listIterator()

Returns a list iterator of the elements in this list (in proper sequence). The iterator will be read-only if the collection is read-only. This method conforms to the List.listIterator() interface.

Specified by:

listIterator in interface List

Returns:

a StoredIterator for this collection.

Throws:

RuntimeExceptionWrapper - if a DatabaseException is thrown.

See Also:

StoredContainer.isWriteAllowed()

listIterator

public ListIterator listIterator(int index)

Returns a list iterator of the elements in this list (in proper sequence), starting at the specified position in this list. The iterator will be read-only if the collection is read-only. This method conforms to the List.listIterator(int) interface.

Specified by:

listIterator in interface List

Returns:

a StoredIterator for this collection.

Throws:

RuntimeExceptionWrapper - if a DatabaseException is thrown.

See Also:

StoredContainer.isWriteAllowed()

remove

public Object remove(int index)

Removes the element at the specified position in this list (optional operation). This method conforms to the List.remove(int) interface.

Specified by:

remove in interface List

Throws:

UnsupportedOperationException - if the collection is a sublist, or if the collection is read-only.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

remove

public boolean remove(Object value)

Removes the first occurrence in this list of the specified element (optional operation). This method conforms to the List.remove(Object) interface.

Specified by:

remove in interface List

Throws:

UnsupportedOperationException - if the collection is a sublist, or if the collection is read-only.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

set

public Object set(int index,
                  Object value)

Replaces the element at the specified position in this list with the specified element (optional operation). This method conforms to the List.set(int, java.lang.Object) interface.

Specified by:

set in interface List

Throws:

UnsupportedOperationException - if the collection is indexed, or if the collection is read-only.

IllegalArgumentException - if an entity value binding is used and the primary key of the value given is different than the existing stored primary key.

RuntimeExceptionWrapper - if a DatabaseException is thrown.

subList

public List subList(int fromIndex,
                    int toIndex)

Returns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive. Note that add() and remove() may not be called for the returned sublist. This method conforms to the List.subList(int, int) interface.

Specified by:

subList in interface List

Throws:

RuntimeExceptionWrapper - if a DatabaseException is thrown.

equals

public boolean equals(Object other)

Compares the specified object with this list for equality. A value comparison is performed by this method and the stored values are compared rather than calling the equals() method of each element. This method conforms to the List.equals(java.lang.Object) interface.

Specified by:

equals in interface List

Overrides:

equals in class StoredCollection

Throws:

RuntimeExceptionWrapper - if a DatabaseException is thrown.

hashCode

public int hashCode()

Specified by:

hashCode in interface List

Overrides:

hashCode in class StoredCollection