Class RepeatedFieldBuilder<MType,BType,IType> (3.19.4) 

public class RepeatedFieldBuilder<MType,BType,IType> implements GeneratedMessage.BuilderParent

RepeatedFieldBuilder implements a structure that a protocol message uses to hold a repeated field of other protocol messages. It supports the classical use case of adding immutable Message's to the repeated field and is highly optimized around this (no extra memory allocations and sharing of immutable arrays).
It also supports the additional use case of adding a Message.Builder to the repeated field and deferring conversion of that Builder to an immutable Message. In this way, it's possible to maintain a tree of Builder's that acts as a fully read/write data structure.
Logically, one can think of a tree of builders as converting the entire tree to messages when build is called on the root or when any method is called that desires a Message instead of a Builder. In terms of the implementation, the SingleFieldBuilder and RepeatedFieldBuilder classes cache messages that were created so that messages only need to be created when some change occurred in its builder or a builder for one of its descendants.

Inheritance

java.lang.Object > RepeatedFieldBuilder<MType,BType,IType>

Type Parameters
Name Description
MType
BType
IType

Constructors

RepeatedFieldBuilder(List<MType> messages, boolean isMessagesListMutable, GeneratedMessage.BuilderParent parent, boolean isClean)

public RepeatedFieldBuilder(List<MType> messages, boolean isMessagesListMutable, GeneratedMessage.BuilderParent parent, boolean isClean)

Constructs a new builder with an empty list of messages.

Parameters
Name Description
messages List<MType>

the current list of messages
isMessagesListMutable boolean

Whether the messages list is mutable
parent GeneratedMessage.BuilderParent

a listener to notify of changes
isClean boolean

whether the builder is initially marked clean

Methods

addAllMessages(Iterable<? extends MType> values)

public RepeatedFieldBuilder<MType,BType,IType> addAllMessages(Iterable<? extends MType> values)

Appends all of the messages in the specified collection to the end of this list, in the order that they are returned by the specified collection's iterator.

Parameter
Name Description
values Iterable<? extends MType>

the messages to add
Returns
Type Description
RepeatedFieldBuilder<MType,BType,IType>

the builder

addBuilder(MType message)

public BType addBuilder(MType message)

Appends a new builder to the end of this list and returns the builder.

Parameter
Name Description
message MType

the message to add which is the basis of the builder
Returns
Type Description
BType

the new builder

addBuilder(int index, MType message)

public BType addBuilder(int index, MType message)

Inserts a new builder at the specified position in this list. Shifts the element currently at that position (if any) and any subsequent elements to the right (adds one to their indices).

Parameters
Name Description
index int

the index at which to insert the builder
message MType

the message to add which is the basis of the builder
Returns
Type Description
BType

the builder

addMessage(MType message)

public RepeatedFieldBuilder<MType,BType,IType> addMessage(MType message)

Appends the specified element to the end of this list.

Parameter
Name Description
message MType

the message to add
Returns
Type Description
RepeatedFieldBuilder<MType,BType,IType>

the builder

addMessage(int index, MType message)

public RepeatedFieldBuilder<MType,BType,IType> addMessage(int index, MType message)

Inserts the specified message at the specified position in this list. Shifts the element currently at that position (if any) and any subsequent elements to the right (adds one to their indices).

Parameters
Name Description
index int

the index at which to insert the message
message MType

the message to add
Returns
Type Description
RepeatedFieldBuilder<MType,BType,IType>

the builder

build()

public List<MType> build()

Builds the list of messages from the builder and returns them.

Returns
Type Description
List<MType>

an immutable list of messages

clear()

public void clear()

Removes all of the elements from this list. The list will be empty after this call returns.

dispose()

public void dispose()

getBuilder(int index)

public BType getBuilder(int index)

Gets a builder for the specified index. If no builder has been created for that index, a builder is created on demand by calling Message#toBuilder.

Parameter
Name Description
index int

the index of the message to get
Returns
Type Description
BType

The builder for that index

getBuilderList()

public List<BType> getBuilderList()

Gets a view of the builder as a list of builders. This returned list is live and will reflect any changes to the underlying builder.

Returns
Type Description
List<BType>

the builders in the list

getCount()

public int getCount()

Gets the count of items in the list.

Returns
Type Description
int

the count of items in the list.

getMessage(int index)

public MType getMessage(int index)

Get the message at the specified index. If the message is currently stored as a Builder, it is converted to a Message by calling Message.Builder#buildPartial on it.

Parameter
Name Description
index int

the index of the message to get
Returns
Type Description
MType

the message for the specified index

getMessageList()

public List<MType> getMessageList()

Gets a view of the builder as a list of messages. The returned list is live and will reflect any changes to the underlying builder.

Returns
Type Description
List<MType>

the messages in the list

getMessageOrBuilder(int index)

public IType getMessageOrBuilder(int index)

Gets the base class interface for the specified index. This may either be a builder or a message. It will return whatever is more efficient.

Parameter
Name Description
index int

the index of the message to get
Returns
Type Description
IType

the message or builder for the index as the base class interface

getMessageOrBuilderList()

public List<IType> getMessageOrBuilderList()

Gets a view of the builder as a list of MessageOrBuilders. This returned list is live and will reflect any changes to the underlying builder.

Returns
Type Description
List<IType>

the builders in the list

isEmpty()

public boolean isEmpty()

Gets whether the list is empty.

Returns
Type Description
boolean

whether the list is empty

markDirty()

public void markDirty()

A builder becomes dirty whenever a field is modified -- including fields in nested builders -- and becomes clean when build() is called. Thus, when a builder becomes dirty, all its parents become dirty as well, and when it becomes clean, all its children become clean. The dirtiness state is used to invalidate certain cached values.

To this end, a builder calls markDirty() on its parent whenever it transitions from clean to dirty. The parent must propagate this call to its own parent, unless it was already dirty, in which case the grandparent must necessarily already be dirty as well. The parent can only transition back to "clean" after calling build() on all children.

remove(int index)

public void remove(int index)

Removes the element at the specified position in this list. Shifts any subsequent elements to the left (subtracts one from their indices).

Parameter
Name Description
index int

the index at which to remove the message

setMessage(int index, MType message)

public RepeatedFieldBuilder<MType,BType,IType> setMessage(int index, MType message)

Sets a message at the specified index replacing the existing item at that index.

Parameters
Name Description
index int

the index to set.
message MType

the message to set
Returns
Type Description
RepeatedFieldBuilder<MType,BType,IType>

the builder