Package com.exonum.binding.core.storage.indices

Interface ListIndex<T>

Type Parameters:

T - the type of elements in this list

All Superinterfaces:

Iterable<T>, StorageIndex

All Known Implementing Classes:

ListIndexProxy, ProofListIndexProxy

public interface ListIndex<T>
extends StorageIndex, Iterable<T>

A list index proxy is a contiguous list of elements.

The "destructive" methods of the list, i.e., those that change its contents, are specified to throw UnsupportedOperationException if this list has been created with a read-only database view.

When the corresponding view goes out of scope, this list is destroyed. Subsequent use of the closed list is prohibited and will result in IllegalStateException.

This interface prohibits null elements. All method arguments are non-null by default.

Method Summary

Modifier and Type	Method	Description
void	add(T e)	Adds a new element to the end of the list.
void	addAll(Collection<? extends T> elements)	Adds all elements from the specified collection to this list.
void	clear()	Clears the list.
T	get(long index)	Returns the element at the given index.
T	getLast()	Returns the last element of the list.
boolean	isEmpty()	Returns true if the list is empty, false — otherwise.
Iterator<T>	iterator()	Returns an iterator over the elements of the list.
void	set(long index, T e)	Replaces the element at the given index of the list with the specified element.
long	size()	Returns the number of elements in the list.
Stream<T>	stream()	Returns a stream of elements in this list.

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface com.exonum.binding.core.storage.indices.StorageIndex

getAddress, getName

Method Detail

add

void add(T e)

Adds a new element to the end of the list.

Parameters:

e - an element to append to the list

Throws:

IllegalStateException - if this list is not valid

UnsupportedOperationException - if this list is read-only

addAll

void addAll(Collection<? extends T> elements)

Adds all elements from the specified collection to this list.

If the collection contains an invalid element, this list is not modified.

Parameters:

elements - elements to add to this list

Throws:

NullPointerException - if the collection is null or it contains null elements. In this case the collection is not modified.

IllegalStateException - if this list is not valid

UnsupportedOperationException - if this list is read-only

set

void set(long index,
         T e)

Replaces the element at the given index of the list with the specified element.

Parameters:

index - an index of the element to replace

e - an element to add

Throws:

IndexOutOfBoundsException - if the index is invalid

IllegalStateException - if this list is not valid

UnsupportedOperationException - if this list is read-only

get

T get(long index)

Returns the element at the given index.

Parameters:

index - an index of the element to return

Returns:

an element at the given index

Throws:

IndexOutOfBoundsException - if index is invalid

IllegalStateException - if this list is not valid

getLast

T getLast()

Returns the last element of the list.

Returns:

the last element of the list

Throws:

NoSuchElementException - if the list is empty

IllegalStateException - if this list is not valid

clear

void clear()

Clears the list.

Throws:

IllegalStateException - if this list is not valid

UnsupportedOperationException - if this list is read-only

isEmpty

boolean isEmpty()

Returns true if the list is empty, false — otherwise.

Throws:

IllegalStateException - if this list is not valid

size

long size()

Returns the number of elements in the list.

Throws:

IllegalStateException - if this list is not valid

iterator

Iterator<T> iterator()

Returns an iterator over the elements of the list.

Specified by:

iterator in interface Iterable<T>

Throws:

IllegalStateException - if this list is not valid

stream

Stream<T> stream()

Returns a stream of elements in this list. The returned stream is fail-fast and late-binding. The stream can be used as long as the source list is valid.

Throws:

IllegalStateException - if this list is not valid