com.google.protobuf

Interface LazyStringList

All Superinterfaces:

Collection<String>, Iterable<String>, List<String>, ProtocolStringList

All Known Implementing Classes:

LazyStringArrayList, UnmodifiableLazyStringList

public interface LazyStringList
extends ProtocolStringList

An interface extending List<String> that also provides access to the items of the list as UTF8-encoded ByteString or byte[] objects. This is used by the protocol buffer implementation to support lazily converting bytes parsed over the wire to String objects until needed and also increases the efficiency of serialization if the String was never requested as the ByteString or byte[] is already cached. The ByteString methods are used in immutable API only and byte[] methods used in mutable API only for they use different representations for string/bytes fields.

Author:

[email protected] (Jon Perlow)

Method Summary

Modifier and Type	Method and Description
void	add(byte[] element) Appends the specified element to the end of this list (optional operation).
void	add(ByteString element) Appends the specified element to the end of this list (optional operation).
boolean	addAllByteArray(Collection<byte[]> c) Appends all elements in the specified byte[] collection to the end of this list.
boolean	addAllByteString(Collection<? extends ByteString> c) Appends all elements in the specified ByteString collection to the end of this list.
List<byte[]>	asByteArrayList() Returns a mutable view of this list.
byte[]	getByteArray(int index) Returns the element at the specified position in this list as byte[].
ByteString	getByteString(int index) Returns the element at the specified position in this list as a ByteString.
Object	getRaw(int index) Returns the element at the specified position in this list as an Object that will either be a String or a ByteString.
List<?>	getUnderlyingElements() Returns an unmodifiable List of the underlying elements, each of which is either a String or its equivalent UTF-8 encoded ByteString or byte[].
LazyStringList	getUnmodifiableView() Returns an unmodifiable view of the list.
void	mergeFrom(LazyStringList other) Merges all elements from another LazyStringList into this one.
void	set(int index, byte[] element) Replaces the element at the specified position in this list with the specified element (optional operation).
void	set(int index, ByteString element) Replaces the element at the specified position in this list with the specified element (optional operation).

Methods inherited from interface com.google.protobuf.ProtocolStringList

asByteStringList

Methods inherited from interface java.util.List

add, add, addAll, addAll, clear, contains, containsAll, equals, get, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, replaceAll, retainAll, set, size, sort, spliterator, subList, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Method Detail

getByteString

ByteString getByteString(int index)

Returns the element at the specified position in this list as a ByteString.

Parameters:

index - index of the element to return

Returns:

the element at the specified position in this list

Throws:

IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())

getRaw

Object getRaw(int index)

Returns the element at the specified position in this list as an Object that will either be a String or a ByteString.

Parameters:

index - index of the element to return

Returns:

the element at the specified position in this list

Throws:

IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())

getByteArray

byte[] getByteArray(int index)

Returns the element at the specified position in this list as byte[].

Parameters:

index - index of the element to return

Returns:

the element at the specified position in this list

Throws:

IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())

add

void add(ByteString element)

Appends the specified element to the end of this list (optional operation).

Parameters:

element - element to be appended to this list

Throws:

UnsupportedOperationException - if the add operation is not supported by this list

add

void add(byte[] element)

Appends the specified element to the end of this list (optional operation).

Parameters:

element - element to be appended to this list

Throws:

UnsupportedOperationException - if the add operation is not supported by this list

set

void set(int index,
         ByteString element)

Replaces the element at the specified position in this list with the specified element (optional operation).

Parameters:

index - index of the element to replace

element - the element to be stored at the specified position

Throws:

UnsupportedOperationException - if the set operation is not supported by this list IndexOutOfBoundsException if the index is out of range (index < 0 || index >= size())

set

void set(int index,
         byte[] element)

Replaces the element at the specified position in this list with the specified element (optional operation).

Parameters:

index - index of the element to replace

element - the element to be stored at the specified position

Throws:

UnsupportedOperationException - if the set operation is not supported by this list IndexOutOfBoundsException if the index is out of range (index < 0 || index >= size())

addAllByteString

boolean addAllByteString(Collection<? extends ByteString> c)

Appends all elements in the specified ByteString collection to the end of this list.

Parameters:

c - collection whose elements are to be added to this list

Returns:

true if this list changed as a result of the call

Throws:

UnsupportedOperationException - if the addAllByteString operation is not supported by this list

addAllByteArray

boolean addAllByteArray(Collection<byte[]> c)

Appends all elements in the specified byte[] collection to the end of this list.

Parameters:

c - collection whose elements are to be added to this list

Returns:

true if this list changed as a result of the call

Throws:

UnsupportedOperationException - if the addAllByteArray operation is not supported by this list

getUnderlyingElements

List<?> getUnderlyingElements()

Returns an unmodifiable List of the underlying elements, each of which is either a String or its equivalent UTF-8 encoded ByteString or byte[]. It is an error for the caller to modify the returned List, and attempting to do so will result in an UnsupportedOperationException.

mergeFrom

void mergeFrom(LazyStringList other)

Merges all elements from another LazyStringList into this one. This method differs from List.addAll(Collection) on that underlying byte arrays are copied instead of reference shared. Immutable API doesn't need to use this method as byte[] is not used there at all.

asByteArrayList

List<byte[]> asByteArrayList()

Returns a mutable view of this list. Changes to the view will be made into the original list. This method is used in mutable API only.

getUnmodifiableView

LazyStringList getUnmodifiableView()

Returns an unmodifiable view of the list.