ChatHistory (Semantic Kernel API 0.2.13-alpha API)

java.lang.Object
- com.microsoft.semantickernel.chatcompletion.ChatHistory

```
public class ChatHistory
extends Object
```
Provides a history of messages between the User, Assistant and System

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`ChatHistory.AuthorRoles`	Role of the author of a chat message
`static class`	`ChatHistory.Message`	Chat message representation

Constructor Summary

Constructors
Constructor Description

ChatHistory()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addMessage(ChatHistory.AuthorRoles authorRole, String content)`	Add a message to the chat history
`Optional<ChatHistory.Message>`	`getLastMessage()`	Get last message
`List<ChatHistory.Message>`	`getMessages()`	Get the chat history

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ChatHistory
```
public ChatHistory()
```
- Method Detail
  - getMessages
```
public List<ChatHistory.Message> getMessages()
```
    Get the chat history
    
    Returns:
    
    List of messages in the chat
  - getLastMessage
```
public Optional<ChatHistory.Message> getLastMessage()
```
    Get last message
    
    Returns:
    
    The most recent message in chat
  - addMessage
```
public void addMessage(ChatHistory.AuthorRoles authorRole,
                       String content)
```
    Add a message to the chat history
    
    Parameters:
    
    authorRole - Role of the message author
    
    content - Message content